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Pérez-Míguez R, Marina ML, Castro-Puyana M. A micellar electrokinetic chromatography approach using diastereomeric derivatization and a volatile surfactant for the enantioselective separation of selenomethionine. Electrophoresis 2019; 40:1951-1958. [PMID: 31111508 DOI: 10.1002/elps.201900077] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2019] [Revised: 05/16/2019] [Accepted: 05/18/2019] [Indexed: 11/06/2022]
Abstract
A MEKC methodology with UV detection was developed for the enantioselective separation of selenomethionine (SeMet). The use of (+)-1-(9-fluorenyl)ethyl chloroformate (FLEC) as chiral derivatization reagent to form SeMet diastereomers enabled their subsequent separation using ammonium perfluorooctanoate (APFO) as a volatile pseudostationary phase. The effect of APFO concentration and pH, temperature, injection volume, and derivatization conditions (time and FLEC/SeMet ratio) were evaluated in order to select the best separation conditions. A chiral resolution of 4.4 for DL-SeMet was achieved in less than 6 min using 100 mM APFO at pH 8.5 as electrophoretic buffer. Satisfactory results were obtained in terms of linearity, precision (RSD from 3.4 to 5.1% for migration times and from 1.8 to 4.6% for corrected peak areas), accuracy, and LODs (3.1 × 10-6 M and 3.7 × 10-6 M for d and l enantiomers, respectively). The method was successfully applied to the determination of l-SeMet in food supplements.
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Affiliation(s)
- Raquel Pérez-Míguez
- Departamento de Química Analítica, Química Física e Ingeniería Química, Facultad de Ciencias, Universidad de Alcalá, Alcalá de Henares (Madrid), Spain
| | - Maria Luisa Marina
- Departamento de Química Analítica, Química Física e Ingeniería Química, Facultad de Ciencias, Universidad de Alcalá, Alcalá de Henares (Madrid), Spain.,Instituto de Investigación Química Andrés M. del Río (IQAR), Universidad de Alcalá, Alcalá de Henares (Madrid), Spain
| | - María Castro-Puyana
- Departamento de Química Analítica, Química Física e Ingeniería Química, Facultad de Ciencias, Universidad de Alcalá, Alcalá de Henares (Madrid), Spain.,Instituto de Investigación Química Andrés M. del Río (IQAR), Universidad de Alcalá, Alcalá de Henares (Madrid), Spain
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Pérez-Míguez R, Salido-Fortuna S, Castro-Puyana M, Marina ML. Advances in the Determination of Nonprotein Amino Acids in Foods and Biological Samples by Capillary Electrophoresis. Crit Rev Anal Chem 2019; 49:459-475. [DOI: 10.1080/10408347.2018.1546113] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.4] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/11/2023]
Affiliation(s)
- Raquel Pérez-Míguez
- Departamento de Química Analítica, Química Física e Ingeniería Química, Universidad de Alcalá, Alcalá de Henares, Madrid, Spain
| | - Sandra Salido-Fortuna
- Departamento de Química Analítica, Química Física e Ingeniería Química, Universidad de Alcalá, Alcalá de Henares, Madrid, Spain
| | - María Castro-Puyana
- Departamento de Química Analítica, Química Física e Ingeniería Química, Universidad de Alcalá, Alcalá de Henares, Madrid, Spain
- Instituto de Investigación Química “Andrés M. del Río” (IQAR), Universidad de Alcalá, Alcalá de Henares, Madrid, Spain
| | - María Luisa Marina
- Departamento de Química Analítica, Química Física e Ingeniería Química, Universidad de Alcalá, Alcalá de Henares, Madrid, Spain
- Instituto de Investigación Química “Andrés M. del Río” (IQAR), Universidad de Alcalá, Alcalá de Henares, Madrid, Spain
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Pérez-Míguez R, Bruyneel B, Castro-Puyana M, Marina ML, Somsen GW, Domínguez-Vega E. Chiral Discrimination of DL-Amino Acids by Trapped Ion Mobility Spectrometry after Derivatization with (+)-1-(9-Fluorenyl)ethyl Chloroformate. Anal Chem 2019; 91:3277-3285. [PMID: 30682252 PMCID: PMC6404107 DOI: 10.1021/acs.analchem.8b03661] [Citation(s) in RCA: 33] [Impact Index Per Article: 6.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
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A novel analytical
method based on hybrid trapped ion mobility
spectrometry-time-of-flight mass spectrometry (TIMS-TOFMS) has been
developed to achieve fast enantiomeric separation of amino acids (AAs).
Resolution of chiral AAs was achieved by forming diastereomers through
derivatization with the chiral agent (+)-1-(9-fluorenyl)ethyl chloroformate
(FLEC), avoiding the use of reference compounds. Electrospray ionization
(ESI) in positive mode yielded sodiated FLEC-AAs ions of which the
diastereomers could be separated by TIMS. The effect of other alkali
metal ions (such as Li and K) on the enantioselectivity was studied,
but chiral discrimination was only observed for Na. TIMS conditions,
including voltage ramp, ramp time, and accumulation time were optimized
for each AA, and collision cross sections (CCSs) were determined for
all diastereomers. The migration order of the DL enantiomers was found
to be dependent on the structure of the AA. The resulting TIMS resolution
(K0/ΔK0) for the FLEC-AA diastereomers on average was 115, requiring
a mobility (K0) difference of about 0.009 cm2/(V s) to
achieve 50%-valley separation. From the 21 AAs studied, enantiomer
separation was achieved for 17 AAs with mobility differences ranging
from 0.009 for lysine up to 0.061 cm2/(V s) for asparagine.
Moreover, the presented methodology provided mutual separation of
various AAs, allowing chiral analysis of multiple AAs simultaneously
which may be challenging with previous enantioselective IMS approaches.
It appeared possible to fully resolve all studied DL-AAs using three
distinct TIMS methods, resulting in a total MS run time of about 3
min (1 min per method) and a total analysis time (including derivatization)
of less than 15 min. The method demonstrated capable to determine
enantiomeric ratios down to 2.5% with detection limits for the D enantiomers
in the nanomolar range. This new TIMS-based methodology opens up possibilities
for easy and fast analysis of AA enantiomers.
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Affiliation(s)
- Raquel Pérez-Míguez
- Division of BioAnalytical Chemistry, Amsterdam Institute for Molecules, Medicines and Systems, Department of Chemistry and Pharmaceutical Sciences , Vrije Universiteit Amsterdam , de Boelelaan 1085 , 1081 HV Amsterdam , The Netherlands.,Department of Analytical Chemistry, Physical Chemistry and Chemical Engineering, Faculty of Sciences , University of Alcalá , Carretera Madrid-Barcelona Km. 33600 , 28871 , Alcalá de Henares , Madrid , Spain
| | - Ben Bruyneel
- Division of BioAnalytical Chemistry, Amsterdam Institute for Molecules, Medicines and Systems, Department of Chemistry and Pharmaceutical Sciences , Vrije Universiteit Amsterdam , de Boelelaan 1085 , 1081 HV Amsterdam , The Netherlands
| | - María Castro-Puyana
- Department of Analytical Chemistry, Physical Chemistry and Chemical Engineering, Faculty of Sciences , University of Alcalá , Carretera Madrid-Barcelona Km. 33600 , 28871 , Alcalá de Henares , Madrid , Spain
| | - María Luisa Marina
- Department of Analytical Chemistry, Physical Chemistry and Chemical Engineering, Faculty of Sciences , University of Alcalá , Carretera Madrid-Barcelona Km. 33600 , 28871 , Alcalá de Henares , Madrid , Spain
| | - Govert W Somsen
- Division of BioAnalytical Chemistry, Amsterdam Institute for Molecules, Medicines and Systems, Department of Chemistry and Pharmaceutical Sciences , Vrije Universiteit Amsterdam , de Boelelaan 1085 , 1081 HV Amsterdam , The Netherlands
| | - Elena Domínguez-Vega
- Division of BioAnalytical Chemistry, Amsterdam Institute for Molecules, Medicines and Systems, Department of Chemistry and Pharmaceutical Sciences , Vrije Universiteit Amsterdam , de Boelelaan 1085 , 1081 HV Amsterdam , The Netherlands
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Castro-Puyana M, Pérez-Míguez R, Montero L, Herrero M. Reprint of: Application of mass spectrometry-based metabolomics approaches for food safety, quality and traceability. Trends Analyt Chem 2017. [DOI: 10.1016/j.trac.2017.08.007] [Citation(s) in RCA: 35] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/18/2022]
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Pérez-Míguez R, Marina ML, Castro-Puyana M. Enantiomeric separation of non-protein amino acids by electrokinetic chromatography. J Chromatogr A 2016; 1467:409-416. [PMID: 27372417 DOI: 10.1016/j.chroma.2016.06.058] [Citation(s) in RCA: 14] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2016] [Revised: 06/06/2016] [Accepted: 06/17/2016] [Indexed: 12/22/2022]
Abstract
New analytical methodologies enabling the enantiomeric separation of a group of non-protein amino acids of interest in the pharmaceutical and food analysis fields were developed in this work using Electrokinetic Chromatography. The use of FMOC as derivatization reagent and the subsequent separation using acidic conditions (formate buffer at pH 2.0) and anionic cyclodextrins as chiral selectors allowed the chiral separation of eight from the ten non-protein amino acids studied. Pyroglutamic acid, norvaline, norleucine, 3,4-dihydroxyphenilalanine, 2-aminoadipic acid, and selenomethionine were enantiomericaly separated using sulfated-α-CD while sulfated-γ-CD enabled the enantiomeric separation of norvaline, 3,4-dihydroxyphenilalanine, 2-aminoadipic acid, selenomethionie, citrulline, and pipecolic acid. Moreover, the potential of the developed methodologies was demonstrated in the analysis of citrulline and its enantiomeric impurity in food supplements. For that purpose, experimental and instrumental variables were optimized and the analytical characteristics of the proposed method were evaluated. LODs of 2.1×10-7 and 1.8×10-7M for d- and l-citrulline, respectively, were obtained. d-Cit was not detectable in any of the six food supplement samples analyzed showing that the effect of storage time on the racemization of citrulline was negligible.
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Affiliation(s)
- Raquel Pérez-Míguez
- Departamento de Química Analítica, Química Física e Ingeniería Química, Facultad de Biología, Ciencias Ambientales y Química, Universidad de Alcalá, Ctra. Madrid-Barcelona Km. 33.600, 28871 Alcalá de Henares, Madrid, Spain
| | - María Luisa Marina
- Departamento de Química Analítica, Química Física e Ingeniería Química, Facultad de Biología, Ciencias Ambientales y Química, Universidad de Alcalá, Ctra. Madrid-Barcelona Km. 33.600, 28871 Alcalá de Henares, Madrid, Spain
| | - María Castro-Puyana
- Departamento de Química Analítica, Química Física e Ingeniería Química, Facultad de Biología, Ciencias Ambientales y Química, Universidad de Alcalá, Ctra. Madrid-Barcelona Km. 33.600, 28871 Alcalá de Henares, Madrid, Spain.
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