---
_id: '13671'
abstract:
- lang: eng
  text: The aging of biodiesel proceeds via multiple pathways, with oligomerization
    playing a central role. In this study, we investigated an epoxide-dependent oligomerization
    pathway, which had previously only been postulated. Using methyl oleate (C18:1)
    as a model monounsaturated fatty acid and acetic acid as a representative, reactive
    nucleophile and known biodiesel aging product with a suitable boiling point, oligomeric
    products were identified by size-exclusion chromatography (SEC) coupled with electrospray
    ionization quadrupole time-of-flight mass spectrometry (ESI-QTOF-MS). The concentration
    of 20 wt% was chosen to ensure a measurable kinetic effect while maintaining stable
    reaction conditions. Furthermore, the role of methyl oleate during biodiesel aging
    was addressed. Time-resolved analysis confirmed the proposed sequential order
    of reactions. It was pointed out that elimination reactions may occur. The data
    support the formation of epoxides, despite the isobaric overlap with ketones,
    and show that hydroxyl intermediates undergo esterification and etherification.
    Moreover, experiments with pure C18:1 demonstrated that acetic acid–derived oligomers
    are generated. Under Rancimat conditions, addition of 20 wt% acetic acid resulted
    in an approximately 1.1 – 2.6 increase in product yield. Kinetic analysis revealed
    structure-dependent formation and decay behavior of the aging products, with slightly
    faster epoxidation and shifted product distributions toward higher oligomeric
    species in the presence of acetic acid. Reactive intermediates were consumed more
    rapidly than oligomeric species and all decay processes followed apparent second-order
    kinetics. These findings provide direct experimental evidence for the involvement
    of epoxide-dependent pathways in biodiesel aging.
article_number: '139339'
author:
- first_name: Julian
  full_name: Türck, Julian
  last_name: Türck
- first_name: Carsten
  full_name: Funke, Carsten
  id: '74167'
  last_name: Funke
- first_name: Fabian
  full_name: Schmitt, Fabian
  last_name: Schmitt
- first_name: Jan
  full_name: Schneider, Jan
  id: '13209'
  last_name: Schneider
  orcid: 0000-0001-6401-8873
- first_name: Hans-Jürgen
  full_name: Danneel, Hans-Jürgen
  id: '12231'
  last_name: Danneel
- first_name: Ralf
  full_name: Türck, Ralf
  last_name: Türck
- first_name: Wolfgang
  full_name: Ruck, Wolfgang
  last_name: Ruck
- first_name: Jürgen
  full_name: Krahl, Jürgen
  id: '68870'
  last_name: Krahl
citation:
  ama: 'Türck J, Funke C, Schmitt F, et al. Kinetic study and confirmation of epoxide-dependent
    oligomerization of methyl oleate. <i>Fuel : the science and technology of fuel
    and energy </i>. 2026;424. doi:<a href="https://doi.org/10.1016/j.fuel.2026.139339">10.1016/j.fuel.2026.139339</a>'
  apa: 'Türck, J., Funke, C., Schmitt, F., Schneider, J., Danneel, H.-J., Türck, R.,
    Ruck, W., &#38; Krahl, J. (2026). Kinetic study and confirmation of epoxide-dependent
    oligomerization of methyl oleate. <i>Fuel : The Science and Technology of Fuel
    and Energy </i>, <i>424</i>, Article 139339. <a href="https://doi.org/10.1016/j.fuel.2026.139339">https://doi.org/10.1016/j.fuel.2026.139339</a>'
  bjps: '<b>Türck J <i>et al.</i></b> (2026) Kinetic Study and Confirmation of Epoxide-Dependent
    Oligomerization of Methyl Oleate. <i>Fuel : the science and technology of fuel
    and energy </i> <b>424</b>.'
  chicago: 'Türck, Julian, Carsten Funke, Fabian Schmitt, Jan Schneider, Hans-Jürgen
    Danneel, Ralf Türck, Wolfgang Ruck, and Jürgen Krahl. “Kinetic Study and Confirmation
    of Epoxide-Dependent Oligomerization of Methyl Oleate.” <i>Fuel : The Science
    and Technology of Fuel and Energy </i> 424 (2026). <a href="https://doi.org/10.1016/j.fuel.2026.139339">https://doi.org/10.1016/j.fuel.2026.139339</a>.'
  chicago-de: 'Türck, Julian, Carsten Funke, Fabian Schmitt, Jan Schneider, Hans-Jürgen
    Danneel, Ralf Türck, Wolfgang Ruck und Jürgen Krahl. 2026. Kinetic study and confirmation
    of epoxide-dependent oligomerization of methyl oleate. <i>Fuel : the science and
    technology of fuel and energy </i> 424. doi:<a href="https://doi.org/10.1016/j.fuel.2026.139339">10.1016/j.fuel.2026.139339</a>,
    .'
  din1505-2-1: '<span style="font-variant:small-caps;">Türck, Julian</span> ; <span
    style="font-variant:small-caps;">Funke, Carsten</span> ; <span style="font-variant:small-caps;">Schmitt,
    Fabian</span> ; <span style="font-variant:small-caps;">Schneider, Jan</span> ;
    <span style="font-variant:small-caps;">Danneel, Hans-Jürgen</span> ; <span style="font-variant:small-caps;">Türck,
    Ralf</span> ; <span style="font-variant:small-caps;">Ruck, Wolfgang</span> ; <span
    style="font-variant:small-caps;">Krahl, Jürgen</span>: Kinetic study and confirmation
    of epoxide-dependent oligomerization of methyl oleate. In: <i>Fuel : the science
    and technology of fuel and energy </i> Bd. 424. Amsterdam [u.a.], Elsevier (2026)'
  havard: 'J. Türck, C. Funke, F. Schmitt, J. Schneider, H.-J. Danneel, R. Türck,
    W. Ruck, J. Krahl, Kinetic study and confirmation of epoxide-dependent oligomerization
    of methyl oleate, Fuel : The Science and Technology of Fuel and Energy . 424 (2026).'
  ieee: 'J. Türck <i>et al.</i>, “Kinetic study and confirmation of epoxide-dependent
    oligomerization of methyl oleate,” <i>Fuel : the science and technology of fuel
    and energy </i>, vol. 424, Art. no. 139339, 2026, doi: <a href="https://doi.org/10.1016/j.fuel.2026.139339">10.1016/j.fuel.2026.139339</a>.'
  mla: 'Türck, Julian, et al. “Kinetic Study and Confirmation of Epoxide-Dependent
    Oligomerization of Methyl Oleate.” <i>Fuel : The Science and Technology of Fuel
    and Energy </i>, vol. 424, 139339, 2026, <a href="https://doi.org/10.1016/j.fuel.2026.139339">https://doi.org/10.1016/j.fuel.2026.139339</a>.'
  short: 'J. Türck, C. Funke, F. Schmitt, J. Schneider, H.-J. Danneel, R. Türck, W.
    Ruck, J. Krahl, Fuel : The Science and Technology of Fuel and Energy  424 (2026).'
  ufg: '<b>Türck, Julian u. a.</b>: Kinetic study and confirmation of epoxide-dependent
    oligomerization of methyl oleate, in: <i>Fuel : the science and technology of
    fuel and energy </i> 424 (2026).'
  van: 'Türck J, Funke C, Schmitt F, Schneider J, Danneel HJ, Türck R, et al. Kinetic
    study and confirmation of epoxide-dependent oligomerization of methyl oleate.
    Fuel : the science and technology of fuel and energy . 2026;424.'
date_created: 2026-04-07T12:49:23Z
date_updated: 2026-04-08T12:55:00Z
doi: 10.1016/j.fuel.2026.139339
intvolume: '       424'
keyword:
- Biodiesel aging
- Epoxide-dependent oligomerization
- Acetic acid
- Identification of aging products
- Kinetics of aging products
language:
- iso: eng
place: Amsterdam [u.a.]
publication: 'Fuel : the science and technology of fuel and energy '
publication_identifier:
  eissn:
  - 1873-7153
  issn:
  - 0016-2361
publication_status: published
publisher: Elsevier
quality_controlled: '1'
status: public
title: Kinetic study and confirmation of epoxide-dependent oligomerization of methyl
  oleate
type: scientific_journal_article
user_id: '83781'
volume: 424
year: '2026'
...
---
_id: '12846'
abstract:
- lang: eng
  text: "The decarbonization of the energy supply is one of the biggest and most important
    challenges of the 21st century. This paper contributes to the solution of the
    energy crisis by investigating the stability of alcohols as e-fuels. The focus
    is on the investigation of the aging mechanism of the linear alcohols 1-hexanol
    and 1-octanol compared to the iso-alcohol 2-hexanol. It is analysed in detail
    how the time-dependent aging varies depending on the chain length and the position
    of the hydroxy-group, both in the liquid and in the gas phase. It is shown that
    a variety of aging products such as aldehydes, acids, short-chain alcohols and
    esters are formed during the aging of the n-alcohols by oxidation, decarboxylation,
    oxidative C-C bond cleavage and esterification. In contrast, the decomposition
    of the iso-alcohol is significantly lower. The results show that the total acid
    number is significantly higher for aged n-alcohols than for the aged iso-alcohos,
    while the kinematic viscosity decreases for all alcohols during aging. Carbon
    mass balancing shows that after accelerated aging for 120 hours, around 80% of
    the iso-alcohol is still present, compared to only around 57-63% for the n-alcohols.
    In addition, significantly fewer acids are formed with the iso-alcohol. In this
    study, iso-alcohols have a higher stability against thermo-oxidative aging compared
    to n-alcohols, showing their potential as e-fuels. Furthermore, the chain length
    of the alcohols has also an influence on aging, as more different aging products
    can be formed with increasing chain length.\r\n\r\nThis paper contributes to the
    solution of the energy crisis by investigating the stability of alcohols as e-fuels.
    The focus is on the investigation of the aging mechanism of 1-hexanol and 1-octanol
    compared to the 2-hexanol."
author:
- first_name: Anne
  full_name: Lichtinger, Anne
  last_name: Lichtinger
- first_name: Maximilian J.
  full_name: Poller, Maximilian J.
  last_name: Poller
- first_name: Olaf
  full_name: Schröder, Olaf
  last_name: Schröder
- first_name: Julian
  full_name: Türck, Julian
  last_name: Türck
- first_name: Thomas
  full_name: Garbe, Thomas
  last_name: Garbe
- first_name: Jürgen
  full_name: Krahl, Jürgen
  id: '68870'
  last_name: Krahl
- first_name: Markus
  full_name: Jakob, Markus
  last_name: Jakob
- first_name: Jakob
  full_name: Albert, Jakob
  last_name: Albert
citation:
  ama: 'Lichtinger A, Poller MJ, Schröder O, et al. Thermo-oxidative aging of linear
    and branched alcohols as stability criterion for their use as e-fuels. <i>  Sustainable
    energy &#38; fuels : interdisciplinary research for the development of sustainable
    energy technologies </i>. 2024;8(15):3329-3340. doi:<a href="https://doi.org/10.1039/d4se00400k">10.1039/d4se00400k</a>'
  apa: 'Lichtinger, A., Poller, M. J., Schröder, O., Türck, J., Garbe, T., Krahl,
    J., Jakob, M., &#38; Albert, J. (2024). Thermo-oxidative aging of linear and branched
    alcohols as stability criterion for their use as e-fuels. <i>  Sustainable Energy
    &#38; Fuels : Interdisciplinary Research for the Development of Sustainable Energy
    Technologies </i>, <i>8</i>(15), 3329–3340. <a href="https://doi.org/10.1039/d4se00400k">https://doi.org/10.1039/d4se00400k</a>'
  bjps: '<b>Lichtinger A <i>et al.</i></b> (2024) Thermo-Oxidative Aging of Linear
    and Branched Alcohols as Stability Criterion for Their Use as e-Fuels. <i>  Sustainable
    energy &#38; fuels : interdisciplinary research for the development of sustainable
    energy technologies </i> <b>8</b>, 3329–3340.'
  chicago: 'Lichtinger, Anne, Maximilian J. Poller, Olaf Schröder, Julian Türck, Thomas
    Garbe, Jürgen Krahl, Markus Jakob, and Jakob Albert. “Thermo-Oxidative Aging of
    Linear and Branched Alcohols as Stability Criterion for Their Use as e-Fuels.”
    <i>  Sustainable Energy &#38; Fuels : Interdisciplinary Research for the Development
    of Sustainable Energy Technologies </i> 8, no. 15 (2024): 3329–40. <a href="https://doi.org/10.1039/d4se00400k">https://doi.org/10.1039/d4se00400k</a>.'
  chicago-de: 'Lichtinger, Anne, Maximilian J. Poller, Olaf Schröder, Julian Türck,
    Thomas Garbe, Jürgen Krahl, Markus Jakob und Jakob Albert. 2024. Thermo-oxidative
    aging of linear and branched alcohols as stability criterion for their use as
    e-fuels. <i>  Sustainable energy &#38; fuels : interdisciplinary research for
    the development of sustainable energy technologies </i> 8, Nr. 15: 3329–3340.
    doi:<a href="https://doi.org/10.1039/d4se00400k">10.1039/d4se00400k</a>, .'
  din1505-2-1: '<span style="font-variant:small-caps;">Lichtinger, Anne</span> ; <span
    style="font-variant:small-caps;">Poller, Maximilian J.</span> ; <span style="font-variant:small-caps;">Schröder,
    Olaf</span> ; <span style="font-variant:small-caps;">Türck, Julian</span> ; <span
    style="font-variant:small-caps;">Garbe, Thomas</span> ; <span style="font-variant:small-caps;">Krahl,
    Jürgen</span> ; <span style="font-variant:small-caps;">Jakob, Markus</span> ;
    <span style="font-variant:small-caps;">Albert, Jakob</span>: Thermo-oxidative
    aging of linear and branched alcohols as stability criterion for their use as
    e-fuels. In: <i>  Sustainable energy &#38; fuels : interdisciplinary research
    for the development of sustainable energy technologies </i> Bd. 8. Cambridge ,
    Royal Society of Chemistry (RSC) (2024), Nr. 15, S. 3329–3340'
  havard: 'A. Lichtinger, M.J. Poller, O. Schröder, J. Türck, T. Garbe, J. Krahl,
    M. Jakob, J. Albert, Thermo-oxidative aging of linear and branched alcohols as
    stability criterion for their use as e-fuels,   Sustainable Energy &#38; Fuels :
    Interdisciplinary Research for the Development of Sustainable Energy Technologies
    . 8 (2024) 3329–3340.'
  ieee: 'A. Lichtinger <i>et al.</i>, “Thermo-oxidative aging of linear and branched
    alcohols as stability criterion for their use as e-fuels,” <i>  Sustainable energy
    &#38; fuels : interdisciplinary research for the development of sustainable energy
    technologies </i>, vol. 8, no. 15, pp. 3329–3340, 2024, doi: <a href="https://doi.org/10.1039/d4se00400k">10.1039/d4se00400k</a>.'
  mla: 'Lichtinger, Anne, et al. “Thermo-Oxidative Aging of Linear and Branched Alcohols
    as Stability Criterion for Their Use as e-Fuels.” <i>  Sustainable Energy &#38;
    Fuels : Interdisciplinary Research for the Development of Sustainable Energy Technologies
    </i>, vol. 8, no. 15, 2024, pp. 3329–40, <a href="https://doi.org/10.1039/d4se00400k">https://doi.org/10.1039/d4se00400k</a>.'
  short: 'A. Lichtinger, M.J. Poller, O. Schröder, J. Türck, T. Garbe, J. Krahl, M.
    Jakob, J. Albert,   Sustainable Energy &#38; Fuels : Interdisciplinary Research
    for the Development of Sustainable Energy Technologies  8 (2024) 3329–3340.'
  ufg: '<b>Lichtinger, Anne u. a.</b>: Thermo-oxidative aging of linear and branched
    alcohols as stability criterion for their use as e-fuels, in: <i>  Sustainable
    energy &#38; fuels : interdisciplinary research for the development of sustainable
    energy technologies </i> 8 (2024), H. 15,  S. 3329–3340.'
  van: 'Lichtinger A, Poller MJ, Schröder O, Türck J, Garbe T, Krahl J, et al. Thermo-oxidative
    aging of linear and branched alcohols as stability criterion for their use as
    e-fuels.   Sustainable energy &#38; fuels : interdisciplinary research for the
    development of sustainable energy technologies . 2024;8(15):3329–40.'
date_created: 2025-04-23T12:27:18Z
date_updated: 2025-06-25T13:00:39Z
department:
- _id: DEP1408
doi: 10.1039/d4se00400k
external_id:
  isi:
  - '001253422700001'
intvolume: '         8'
isi: '1'
issue: '15'
keyword:
- OXIDATION
- 1-OCTANOL
- PERFORMANCE
- CATALYSTS
- KINETICS
- ACID
language:
- iso: eng
page: 3329-3340
place: 'Cambridge '
publication: '  Sustainable energy & fuels : interdisciplinary research for the development
  of sustainable energy technologies '
publication_identifier:
  issn:
  - 2398-4902
publication_status: published
publisher: Royal Society of Chemistry (RSC)
status: public
title: Thermo-oxidative aging of linear and branched alcohols as stability criterion
  for their use as e-fuels
type: scientific_journal_article
user_id: '83781'
volume: 8
year: '2024'
...
---
_id: '11385'
abstract:
- lang: eng
  text: Accurate pH calculations are essential for scientists across different disciplines
    to design optimal reactor solutions, but they can be arduous to calculate for
    complex acid-base solutions. Visual Water is a powerful software tool that provides
    accurate pH calculations with automated mathematical uncertainty analysis. Its
    workflow is presented and validated using acids and bases, showing a deviation
    of < 0.2 pH units between measured and calculated pH values. This highlights the
    software's reliability, which can help to simplify the work of non-experts in
    water chemistry.
author:
- first_name: Pascal
  full_name: Kosse, Pascal
  last_name: Kosse
- first_name: Tanja
  full_name: Hernández Rodriguez, Tanja
  id: '52466'
  last_name: Hernández Rodriguez
- first_name: Björn
  full_name: Frahm, Björn
  id: '45666'
  last_name: Frahm
- first_name: Manfred
  full_name: Lübken, Manfred
  last_name: Lübken
- first_name: Marc
  full_name: Wichern, Marc
  last_name: Wichern
citation:
  ama: Kosse P, Hernández Rodriguez T, Frahm B, Lübken M, Wichern M. Validation and
    Uncertainty Assessment of a Software‐Integrated Workflow for pH Calculations.
    <i>Chemie Ingenieur Technik</i>. 2023;95(12):1960-1969. doi:<a href="https://doi.org/10.1002/cite.202300082">10.1002/cite.202300082</a>
  apa: Kosse, P., Hernández Rodriguez, T., Frahm, B., Lübken, M., &#38; Wichern, M.
    (2023). Validation and Uncertainty Assessment of a Software‐Integrated Workflow
    for pH Calculations. <i>Chemie Ingenieur Technik</i>, <i>95</i>(12), 1960–1969.
    <a href="https://doi.org/10.1002/cite.202300082">https://doi.org/10.1002/cite.202300082</a>
  bjps: <b>Kosse P <i>et al.</i></b> (2023) Validation and Uncertainty Assessment
    of a Software‐Integrated Workflow for PH Calculations. <i>Chemie Ingenieur Technik</i>
    <b>95</b>, 1960–1969.
  chicago: 'Kosse, Pascal, Tanja Hernández Rodriguez, Björn Frahm, Manfred Lübken,
    and Marc Wichern. “Validation and Uncertainty Assessment of a Software‐Integrated
    Workflow for PH Calculations.” <i>Chemie Ingenieur Technik</i> 95, no. 12 (2023):
    1960–69. <a href="https://doi.org/10.1002/cite.202300082">https://doi.org/10.1002/cite.202300082</a>.'
  chicago-de: 'Kosse, Pascal, Tanja Hernández Rodriguez, Björn Frahm, Manfred Lübken
    und Marc Wichern. 2023. Validation and Uncertainty Assessment of a Software‐Integrated
    Workflow for pH Calculations. <i>Chemie Ingenieur Technik</i> 95, Nr. 12: 1960–1969.
    doi:<a href="https://doi.org/10.1002/cite.202300082">10.1002/cite.202300082</a>,
    .'
  din1505-2-1: '<span style="font-variant:small-caps;">Kosse, Pascal</span> ; <span
    style="font-variant:small-caps;">Hernández Rodriguez, Tanja</span> ; <span style="font-variant:small-caps;">Frahm,
    Björn</span> ; <span style="font-variant:small-caps;">Lübken, Manfred</span> ;
    <span style="font-variant:small-caps;">Wichern, Marc</span>: Validation and Uncertainty
    Assessment of a Software‐Integrated Workflow for pH Calculations. In: <i>Chemie
    Ingenieur Technik</i> Bd. 95. Weinheim, Wiley (2023), Nr. 12, S. 1960–1969'
  havard: P. Kosse, T. Hernández Rodriguez, B. Frahm, M. Lübken, M. Wichern, Validation
    and Uncertainty Assessment of a Software‐Integrated Workflow for pH Calculations,
    Chemie Ingenieur Technik. 95 (2023) 1960–1969.
  ieee: 'P. Kosse, T. Hernández Rodriguez, B. Frahm, M. Lübken, and M. Wichern, “Validation
    and Uncertainty Assessment of a Software‐Integrated Workflow for pH Calculations,”
    <i>Chemie Ingenieur Technik</i>, vol. 95, no. 12, pp. 1960–1969, 2023, doi: <a
    href="https://doi.org/10.1002/cite.202300082">10.1002/cite.202300082</a>.'
  mla: Kosse, Pascal, et al. “Validation and Uncertainty Assessment of a Software‐Integrated
    Workflow for PH Calculations.” <i>Chemie Ingenieur Technik</i>, vol. 95, no. 12,
    2023, pp. 1960–69, <a href="https://doi.org/10.1002/cite.202300082">https://doi.org/10.1002/cite.202300082</a>.
  short: P. Kosse, T. Hernández Rodriguez, B. Frahm, M. Lübken, M. Wichern, Chemie
    Ingenieur Technik 95 (2023) 1960–1969.
  ufg: '<b>Kosse, Pascal u. a.</b>: Validation and Uncertainty Assessment of a Software‐Integrated
    Workflow for pH Calculations, in: <i>Chemie Ingenieur Technik</i> 95 (2023), H.
    12,  S. 1960–1969.'
  van: Kosse P, Hernández Rodriguez T, Frahm B, Lübken M, Wichern M. Validation and
    Uncertainty Assessment of a Software‐Integrated Workflow for pH Calculations.
    Chemie Ingenieur Technik. 2023;95(12):1960–9.
date_created: 2024-04-26T06:52:48Z
date_updated: 2025-06-26T07:50:29Z
department:
- _id: DEP4000
doi: 10.1002/cite.202300082
external_id:
  isi:
  - '001073579300001'
intvolume: '        95'
isi: '1'
issue: '12'
keyword:
- Acid-base equilibria
- Carboxylic acids
- Dissociation constants
- pH calculation software
- Uncertainty assessment
language:
- iso: eng
page: 1960-1969
place: Weinheim
publication: Chemie Ingenieur Technik
publication_identifier:
  eissn:
  - 1522-2640
  issn:
  - 0009-286X
publication_status: published
publisher: Wiley
quality_controlled: '1'
status: public
title: Validation and Uncertainty Assessment of a Software‐Integrated Workflow for
  pH Calculations
type: scientific_journal_article
user_id: '83781'
volume: 95
year: '2023'
...
---
_id: '7090'
abstract:
- lang: eng
  text: The conventional method for the determination of the lethal heat load during
    pasteurisation (expressed in so-called pasteurisation units (PU)) by measuring
    temperature and flow rate provides known inaccuracies and requires safety margins
    in terms of a planned over-pasteurisation to the detriment of the product quality.
    Based on the hypothesis that chemical conversions correlate with applied heat
    input, despite the differences in reaction kinetics between chemical conversion
    and microbiological inactivation, inline near infrared spectroscopy (NIRS) was
    investigated to identify and quantify applied PU. Acid hydrolytic sucrose degradation
    was confirmed a favourable marker reaction. In a first step by still using offline
    analytics (HPLC) and a calculation the feasibility and plausibility in principle
    could be proved. Compared with conventional PU deviation of only 0.3% were found
    when using the chemical marker reaction. However, the inline application using
    NIRS showed too high variations. The too low accuracy of the NIRS model for the
    sucrose measurement was identified of being the cause for failing the overall
    goal. Improvements in the inline determination seem to be promising.
author:
- first_name: Imke
  full_name: Weishaupt, Imke
  id: '58425'
  last_name: Weishaupt
- first_name: Peter
  full_name: Neubauer, Peter
  last_name: Neubauer
- first_name: Jan
  full_name: Schneider, Jan
  id: '13209'
  last_name: Schneider
  orcid: 0000-0001-6401-8873
citation:
  ama: Weishaupt I, Neubauer P, Schneider J. Approach to an inline monitoring of the
    heat impact in a high temperature short time treatment (HTST) of juice with the
    help of a chemical marker. <i>Brewing science</i>. 2022;75(1/2):1-8. doi:<a href="https://doi.org/10.23763/BrSc21-20weishaupt">10.23763/BrSc21-20weishaupt</a>
  apa: Weishaupt, I., Neubauer, P., &#38; Schneider, J. (2022). Approach to an inline
    monitoring of the heat impact in a high temperature short time treatment (HTST)
    of juice with the help of a chemical marker. <i>Brewing Science</i>, <i>75</i>(1/2),
    1–8. <a href="https://doi.org/10.23763/BrSc21-20weishaupt">https://doi.org/10.23763/BrSc21-20weishaupt</a>
  bjps: <b>Weishaupt I, Neubauer P and Schneider J</b> (2022) Approach to an Inline
    Monitoring of the Heat Impact in a High Temperature Short Time Treatment (HTST)
    of Juice with the Help of a Chemical Marker. <i>Brewing science</i> <b>75</b>,
    1–8.
  chicago: 'Weishaupt, Imke, Peter Neubauer, and Jan Schneider. “Approach to an Inline
    Monitoring of the Heat Impact in a High Temperature Short Time Treatment (HTST)
    of Juice with the Help of a Chemical Marker.” <i>Brewing Science</i> 75, no. 1/2
    (2022): 1–8. <a href="https://doi.org/10.23763/BrSc21-20weishaupt">https://doi.org/10.23763/BrSc21-20weishaupt</a>.'
  chicago-de: 'Weishaupt, Imke, Peter Neubauer und Jan Schneider. 2022. Approach to
    an inline monitoring of the heat impact in a high temperature short time treatment
    (HTST) of juice with the help of a chemical marker. <i>Brewing science</i> 75,
    Nr. 1/2: 1–8. doi:<a href="https://doi.org/10.23763/BrSc21-20weishaupt">10.23763/BrSc21-20weishaupt</a>,
    .'
  din1505-2-1: '<span style="font-variant:small-caps;">Weishaupt, Imke</span> ; <span
    style="font-variant:small-caps;">Neubauer, Peter</span> ; <span style="font-variant:small-caps;">Schneider,
    Jan</span>: Approach to an inline monitoring of the heat impact in a high temperature
    short time treatment (HTST) of juice with the help of a chemical marker. In: <i>Brewing
    science</i> Bd. 75, Carl (2022), Nr. 1/2, S. 1–8'
  havard: I. Weishaupt, P. Neubauer, J. Schneider, Approach to an inline monitoring
    of the heat impact in a high temperature short time treatment (HTST) of juice
    with the help of a chemical marker, Brewing Science. 75 (2022) 1–8.
  ieee: 'I. Weishaupt, P. Neubauer, and J. Schneider, “Approach to an inline monitoring
    of the heat impact in a high temperature short time treatment (HTST) of juice
    with the help of a chemical marker,” <i>Brewing science</i>, vol. 75, no. 1/2,
    pp. 1–8, 2022, doi: <a href="https://doi.org/10.23763/BrSc21-20weishaupt">10.23763/BrSc21-20weishaupt</a>.'
  mla: Weishaupt, Imke, et al. “Approach to an Inline Monitoring of the Heat Impact
    in a High Temperature Short Time Treatment (HTST) of Juice with the Help of a
    Chemical Marker.” <i>Brewing Science</i>, vol. 75, no. 1/2, 2022, pp. 1–8, <a
    href="https://doi.org/10.23763/BrSc21-20weishaupt">https://doi.org/10.23763/BrSc21-20weishaupt</a>.
  short: I. Weishaupt, P. Neubauer, J. Schneider, Brewing Science 75 (2022) 1–8.
  ufg: '<b>Weishaupt, Imke/Neubauer, Peter/Schneider, Jan</b>: Approach to an inline
    monitoring of the heat impact in a high temperature short time treatment (HTST)
    of juice with the help of a chemical marker, in: <i>Brewing science</i> 75 (2022),
    H. 1/2,  S. 1–8.'
  van: Weishaupt I, Neubauer P, Schneider J. Approach to an inline monitoring of the
    heat impact in a high temperature short time treatment (HTST) of juice with the
    help of a chemical marker. Brewing science. 2022;75(1/2):1–8.
date_created: 2022-02-28T10:50:48Z
date_updated: 2026-03-12T11:52:14Z
department:
- _id: DEP4018
- _id: DEP1308
- _id: DEP4028
doi: 10.23763/BrSc21-20weishaupt
external_id:
  isi:
  - '000858906600001'
intvolume: '        75'
isi: '1'
issue: 1/2
keyword:
- near infrared spectroscopy
- apple juice
- pasteurisation
- acid hydrolytic sucrose degradation
- inline measure-ment of heat input
- pasteurisation units
language:
- iso: eng
main_file_link:
- open_access: '1'
  url: https://www.researchgate.net/publication/360806853_Approach_to_an_inline_monitoring_of_the_heat_impact_in_a_high_temperature_short_time_treatment_HTST_of_juice_with_the_help_of_a_chemical_marker
oa: '1'
page: 1-8
publication: Brewing science
publication_identifier:
  eissn:
  - 1613-2041
  issn:
  - '1866-5195 '
publication_status: published
publisher: Carl
status: public
title: Approach to an inline monitoring of the heat impact in a high temperature short
  time treatment (HTST) of juice with the help of a chemical marker
type: journal_article
user_id: '83778'
volume: 75
year: '2022'
...
---
_id: '5406'
abstract:
- lang: eng
  text: "\r\nThe pentacyclic triterpenes oleanolic acid (OA) and ursolic acid (UA)
    in Salvia triloba are attractive ingredients for cosmetic and pharmaceutical formulations.
    These triterpenoids are constitution isomers and differ only in the position of
    one methyl group in their chemical structures. Therefore it is difficult to achieve
    a baseline separation by standard RP-HPLC systems. Another challenge is that the
    complex plant contains a large variety of similar compounds. To achieve precise
    results for the target molecules, these compounds should be removed prior to analysis.
    Due to the large application of these two triterpenes, a fast quantification method
    is favored. If the triterpenes are extracted with aqueous two-phase systems, the
    target substances are enriched in a surfactant-rich phase. For this application,
    it is desirable to develop a method that is capable of quantifying both triterpenes
    directly by RP-HPLC without additional purification steps.\r\n\r\nThe optimal
    chromatographic conditions for pure substances as well as for crude surfactant-containing
    extracts were accomplished on a Nucleodur C18 ISIS column by isocratic elution
    with methanol/water/acetic acid/triethanolamine (90:10:0.04:0.02 v/v) as the mobile
    phase and a column temperature of 10°C. The flow rate was 0.6 mL/min, and the
    detection wavelength was 210 nm. With these parameters, a baseline separation
    was achieved and the calibration curve showed a very good linearity (R2 > 0.999
    for OA and UA) within the test range. The method is simple, rapid, and reliable
    for the quantification of crude extracts from plant material.\r\n"
author:
- first_name: Pia
  full_name: Schneider, Pia
  id: '75629'
  last_name: Schneider
- first_name: S. S.
  full_name: Hosseiny, S. S.
  last_name: Hosseiny
- first_name: F.
  full_name: Bischoff, F.
  last_name: Bischoff
- first_name: Ulrich
  full_name: Müller, Ulrich
  id: '12119'
  last_name: Müller
- first_name: H. J.
  full_name: Bart, H. J.
  last_name: Bart
- first_name: K.
  full_name: Schlitter, K.
  last_name: Schlitter
- first_name: V.
  full_name: Jordan, V.
  last_name: Jordan
citation:
  ama: Schneider P, Hosseiny SS, Bischoff F, et al. SURFACTANT MEDIATED EXTRACTION
    OF TRITERPENES AND THEIR DIRECT HPLC ANALYSIS FROM THE MICELLAR SYSTEM. <i>Instrumentation
    Science &#38; Technology</i>. 2011:407-418. doi:<a href="https://doi.org/10.1080/10739149.2011.602167">10.1080/10739149.2011.602167</a>
  apa: Schneider, P., Hosseiny, S. S., Bischoff, F., Müller, U., Bart, H. J., Schlitter,
    K., &#38; Jordan, V. (2011). SURFACTANT MEDIATED EXTRACTION OF TRITERPENES AND
    THEIR DIRECT HPLC ANALYSIS FROM THE MICELLAR SYSTEM. <i>Instrumentation Science
    &#38; Technology</i>, 407–418. <a href="https://doi.org/10.1080/10739149.2011.602167">https://doi.org/10.1080/10739149.2011.602167</a>
  bjps: <b>Schneider P <i>et al.</i></b> (2011) SURFACTANT MEDIATED EXTRACTION OF
    TRITERPENES AND THEIR DIRECT HPLC ANALYSIS FROM THE MICELLAR SYSTEM. <i>Instrumentation
    Science &#38; Technology</i> 407–418.
  chicago: Schneider, Pia, S. S. Hosseiny, F. Bischoff, Ulrich Müller, H. J. Bart,
    K. Schlitter, and V. Jordan. “SURFACTANT MEDIATED EXTRACTION OF TRITERPENES AND
    THEIR DIRECT HPLC ANALYSIS FROM THE MICELLAR SYSTEM.” <i>Instrumentation Science
    &#38; Technology</i>, 2011, 407–18. <a href="https://doi.org/10.1080/10739149.2011.602167">https://doi.org/10.1080/10739149.2011.602167</a>.
  chicago-de: 'Schneider, Pia, S. S. Hosseiny, F. Bischoff, Ulrich Müller, H. J. Bart,
    K. Schlitter und V. Jordan. 2011. SURFACTANT MEDIATED EXTRACTION OF TRITERPENES
    AND THEIR DIRECT HPLC ANALYSIS FROM THE MICELLAR SYSTEM. <i>Instrumentation Science
    &#38; Technology</i>: 407–418. doi:<a href="https://doi.org/10.1080/10739149.2011.602167,">10.1080/10739149.2011.602167,</a>
    .'
  din1505-2-1: '<span style="font-variant:small-caps;">Schneider, Pia</span> ; <span
    style="font-variant:small-caps;">Hosseiny, S. S.</span> ; <span style="font-variant:small-caps;">Bischoff,
    F.</span> ; <span style="font-variant:small-caps;">Müller, Ulrich</span> ; <span
    style="font-variant:small-caps;">Bart, H. J.</span> ; <span style="font-variant:small-caps;">Schlitter,
    K.</span> ; <span style="font-variant:small-caps;">Jordan, V.</span>: SURFACTANT
    MEDIATED EXTRACTION OF TRITERPENES AND THEIR DIRECT HPLC ANALYSIS FROM THE MICELLAR
    SYSTEM. In: <i>Instrumentation Science &#38; Technology</i> (2011), S. 407–418'
  havard: P. Schneider, S.S. Hosseiny, F. Bischoff, U. Müller, H.J. Bart, K. Schlitter,
    V. Jordan, SURFACTANT MEDIATED EXTRACTION OF TRITERPENES AND THEIR DIRECT HPLC
    ANALYSIS FROM THE MICELLAR SYSTEM, Instrumentation Science &#38; Technology. (2011)
    407–418.
  ieee: P. Schneider <i>et al.</i>, “SURFACTANT MEDIATED EXTRACTION OF TRITERPENES
    AND THEIR DIRECT HPLC ANALYSIS FROM THE MICELLAR SYSTEM,” <i>Instrumentation Science
    &#38; Technology</i>, pp. 407–418, 2011.
  mla: Schneider, Pia, et al. “SURFACTANT MEDIATED EXTRACTION OF TRITERPENES AND THEIR
    DIRECT HPLC ANALYSIS FROM THE MICELLAR SYSTEM.” <i>Instrumentation Science &#38;
    Technology</i>, 2011, pp. 407–18, doi:<a href="https://doi.org/10.1080/10739149.2011.602167">10.1080/10739149.2011.602167</a>.
  short: P. Schneider, S.S. Hosseiny, F. Bischoff, U. Müller, H.J. Bart, K. Schlitter,
    V. Jordan, Instrumentation Science &#38; Technology (2011) 407–418.
  ufg: '<b>Schneider, Pia et. al. (2011)</b>: SURFACTANT MEDIATED EXTRACTION OF TRITERPENES
    AND THEIR DIRECT HPLC ANALYSIS FROM THE MICELLAR SYSTEM, in: <i>Instrumentation
    Science &#38; Technology</i>, S. 407–418.'
  van: Schneider P, Hosseiny SS, Bischoff F, Müller U, Bart HJ, Schlitter K, et al.
    SURFACTANT MEDIATED EXTRACTION OF TRITERPENES AND THEIR DIRECT HPLC ANALYSIS FROM
    THE MICELLAR SYSTEM. Instrumentation Science &#38; Technology. 2011;407–18.
date_created: 2021-04-07T12:32:48Z
date_updated: 2023-03-15T13:49:59Z
department:
- _id: DEP4023
- _id: DEP4009
doi: 10.1080/10739149.2011.602167
keyword:
- oleanolic acid
- Salvia triloba
- surfactants
- triterpenes
- ursolic acid
language:
- iso: eng
page: 407-418
publication: Instrumentation Science & Technology
publication_identifier:
  eissn:
  - 1525-6030
  issn:
  - 1073-9149
publication_status: published
status: public
title: SURFACTANT MEDIATED EXTRACTION OF TRITERPENES AND THEIR DIRECT HPLC ANALYSIS
  FROM THE MICELLAR SYSTEM
type: journal_article
user_id: '15514'
year: 2011
...