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Onozato M, Horinouchi M, Yoshiba Y, Sakamoto T, Sugasawa H, Fukushima T. Determination of Imidazole Dipeptides and Related Amino Acids in Natural Seafoods by Liquid Chromatography-Tandem Mass Spectrometry Using a Pre-Column Derivatization Reagent. Foods 2024; 13:1951. [PMID: 38928892 PMCID: PMC11202704 DOI: 10.3390/foods13121951] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/13/2024] [Revised: 06/12/2024] [Accepted: 06/13/2024] [Indexed: 06/28/2024] Open
Abstract
Imidazole dipeptides (IDPs) and taurine (Tau) have several health benefits and are known to be contained in natural seafoods. However, their levels vary widely in different natural seafoods, making their simultaneous determination desirable. Herein, we employ a liquid chromatography-tandem mass spectrometry approach using a novel amino group derivatization reagent, succinimidyl 2-(3-((benzyloxy)carbonyl)-1-methyl-5-oxoimidazolidin-4-yl) acetate ((R)-CIMa-OSu), for the simultaneous quantification of IDPs (carnosine (Car) and anserine (Ans)), their related amino acids, and Tau in natural seafoods. Each seafood sample contained different concentrations of IDPs (Car: ND to 1.48 mmol/100 g-wet, Ans: ND to 4.67 mmol/100 g-wet). The Car levels were considerably higher in eel, while Tau was more abundant in squid, boiled octopus, and scallop. Thus, the derivatization reagent (R)-CIMa-OSu provides a new approach to accurately assess the nutritional composition of seafoods, thereby providing valuable insight into its dietary benefits.
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Affiliation(s)
| | | | | | | | | | - Takeshi Fukushima
- Department of Analytical Chemistry, Faculty of Pharmaceutical Sciences, Toho University, 2-2-1 Miyama, Funabashi-shi 274-8510, Chiba, Japan; (M.O.); (M.H.); (Y.Y.); (T.S.); (H.S.)
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Maciel LS, Marengo A, Rubiolo P, Leito I, Herodes K. Derivatization-targeted analysis of amino compounds in plant extracts in neutral loss acquisition mode by liquid chromatography-tandem mass spectrometry. J Chromatogr A 2021; 1656:462555. [PMID: 34571278 DOI: 10.1016/j.chroma.2021.462555] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/03/2021] [Revised: 09/09/2021] [Accepted: 09/12/2021] [Indexed: 11/26/2022]
Abstract
Amino compounds, such as amino acids and biogenic amines, are important metabolites that can be found in diverse natural matrices. The most common method for amino compound analysis nowadays is reversed-phase liquid chromatography tandem mass spectrometry (RPLC-MS/MS). However, due to the polar and the basic nature of amines, their RPLC retention is often insufficient or peaks are tailing. Derivatization is a way to overcome the issue and in the present work amino compounds are derivatized with diethyl ethoxymethylenemalonate (DEEMM) and analyzed by a RPLC triple quadrupole MS system in neutral loss scan (NLS) mode (loss of 46). This allows to target all compounds in the sample that undergo derivatization with DEEMM, so that the amino compound profile of the sample is obtained. To the best of our knowledge, the NLS acquisition mode has never been employed to target amino compounds after DEEMM derivatization. In the first part of the study, eight amino acids (arginine, aspartic acid, threonine, proline, tyrosine, tryptophan, phenylalanine and isoleucine) were employed as model compounds for method optimization, with good results in terms of DEEMM derivatives detection and repeatability. The developed method was successfully applied to a complex extract from the plant species Carduus nutans subsp. macrocephalus (Desf.) Nyman, with 18 amino acids and 3 other amines being identified. The proposed approach could be employed for straightforward identification of known and unknown amino compounds in different types of matrices.
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Affiliation(s)
| | - Arianna Marengo
- Institute of Chemistry, University of Tartu, Ravila 14a, Tartu, 50411, Estonia; Dipartimento di Scienza e Tecnologia Del Farmaco, Università di Torino, Via P. Giuria 9, 10125, Torino, Italy.
| | - Patrizia Rubiolo
- Dipartimento di Scienza e Tecnologia Del Farmaco, Università di Torino, Via P. Giuria 9, 10125, Torino, Italy
| | - Ivo Leito
- Institute of Chemistry, University of Tartu, Ravila 14a, Tartu, 50411, Estonia
| | - Koit Herodes
- Institute of Chemistry, University of Tartu, Ravila 14a, Tartu, 50411, Estonia
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Zhao Z, Ning C, Chen L, Zhao Y, Yang G, Wang C, Chen N, Zhang Z, Li S. Impacts of manufacture processes and geographical regions on the microbial profile of traditional Chinese cheeses. Food Res Int 2021; 148:110600. [PMID: 34507745 DOI: 10.1016/j.foodres.2021.110600] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/20/2021] [Revised: 07/07/2021] [Accepted: 07/08/2021] [Indexed: 10/20/2022]
Abstract
The microbiota of cheese plays a critical role in determining its organoleptic and other physicochemical properties. Thus, assessing the composition of the cheese microbiota community would help promote the growth of desirable taxa and ultimately to optimize flavor, quality and safety. Here we measured microbial diversity, microbiota composition, short-chain fatty acids, and free amino acids in two traditional cheese-making strategies, Rushan and Rubing, processed in parallel from Lijiang, Eryuan, and Dengchuan of Yunnan province, China. We found distinct microbiota composition, and microbial diversity and richness in both Rushan and Rubing across all three regions, which were proportional to the scale of the cities where the cheeses were sampled. Furthermore, we found positive associations of Streptococcus and Acinetobacter with butyric acid, Phe and Tyr, which were negatively correlated with Lactococcus. For the first time, we provide evidence that environmental microbial contamination in cheese can be correlated with the manufacturing procedures and geographical regions. This should be paid more attention in upcoming cheese microbiota studies.
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Affiliation(s)
- Zijian Zhao
- Institute of Agro-food Technology, Jilin Academy of Agricultural Sciences, Changchun 130033, China
| | - Chao Ning
- School of Archaeology and Museology, Peking University, Beijing 100871, China; Max Planck Institute for the Science of Human History, Jena 07745, Germany.
| | - Long Chen
- Jilin Academy of Agricultural Sciences, Changchun 130033, China
| | - Yujuan Zhao
- Institute of Agro-food Technology, Jilin Academy of Agricultural Sciences, Changchun 130033, China
| | - Ge Yang
- Institute of Agro-food Technology, Jilin Academy of Agricultural Sciences, Changchun 130033, China
| | - Chao Wang
- Institute of Agro-food Technology, Jilin Academy of Agricultural Sciences, Changchun 130033, China
| | - Naishi Chen
- Jilin Academy of Agricultural Sciences, Changchun 130033, China
| | - Zhaoye Zhang
- Jilin Academy of Agricultural Sciences, Changchun 130033, China
| | - Shengyu Li
- Institute of Agro-food Technology, Jilin Academy of Agricultural Sciences, Changchun 130033, China
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4
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Rapid analysis of phenyl isothiocyanate derivatives of amino acids present in Czech meads. J Chromatogr A 2021; 1644:462134. [PMID: 33848765 DOI: 10.1016/j.chroma.2021.462134] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/02/2020] [Revised: 03/24/2021] [Accepted: 03/30/2021] [Indexed: 12/15/2022]
Abstract
Amino acids (AAs) are minor compounds occurring in meads contributing to their final organoleptic properties. Determination of AAs profile and content can help to assess the mead authenticity, adulteration and thus its quality. This work deals with the optimization of rapid analysis of 21 AAs present in mead using reversed-phase high performance liquid chromatography with spectrophotometric detection after simple derivatization procedure with phenyl isothiocyanate agent without any sample pre-treatment. Optimized derivatization and separation conditions have been successfully applied to the quantification of AAs present in five Czech meads using the multiple point standard addition method. The total amino acid content was in the range of 134-828 mg/L. The content of proline was confirmed by Harmonised spectrophotometric method. Both chromatographic and spectrophotometric methods provided overlapping results in the range of 30-266 mg/L.
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Pundi A, Chang CJ, Chen YS, Chen JK, Yeh JM, Zhuang CS, Lee MC. An aniline trimer-based multifunctional sensor for colorimetric Fe 3+, Cu 2+ and Ag + detection, and its complex for fluorescent sensing of L-tryptophan. SPECTROCHIMICA ACTA. PART A, MOLECULAR AND BIOMOLECULAR SPECTROSCOPY 2021; 247:119075. [PMID: 33096391 DOI: 10.1016/j.saa.2020.119075] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 07/02/2020] [Revised: 09/29/2020] [Accepted: 10/09/2020] [Indexed: 06/11/2023]
Abstract
The detection of metal ions and amino acids by the aniline oligomer-based receptor has not been reported yet, to the best of our knowledge. In this study, an efficient multifunctional cation-amino acid sensor (CAS) with aniline moiety and chiral thiourea binding site was synthesized by the reaction of aniline trimer and (S)-(+)-1-phenyl ethyl isothiocyanate. CAS can sense Fe3+, Cu2+, Ag+ ions, and L-tryptophan. These results can be recognized by the naked eye. The appropriate pH range for the quantitative analysis of Fe3+, Cu2+, and Ag+ by CAS in DMSO/water (30 vol% water) was evaluated. The interaction between CCS and metal ions was analyzed by 1H NMR titration. The detection limits of CAS for the Cu2+, Ag+, and Fe3+ were 0.214, 0.099, and 0.147 μM, respectively. Moreover, the CASCu2+ complex can act as a turn-on fluorescence sensor for L-tryptophan. On the contrary, there is no response upon the addition of other amino acids, such as L-histidine, L-proline, L-phenylalanine, L-threonine, L-methionine, L-tyrosine, and L-cystine to CASCu2+ complex.
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Affiliation(s)
- Arul Pundi
- Department of Chemical Engineering, Feng Chia University, 100, Wenhwa Road, Seatwen, Taichung 40724, Taiwan, ROC
| | - Chi-Jung Chang
- Department of Chemical Engineering, Feng Chia University, 100, Wenhwa Road, Seatwen, Taichung 40724, Taiwan, ROC.
| | - Yi-Shao Chen
- Department of Chemical Engineering, Feng Chia University, 100, Wenhwa Road, Seatwen, Taichung 40724, Taiwan, ROC
| | - Jem-Kun Chen
- Department of Materials Science and Engineering, National Taiwan University of Science and Technology, 43, Sec. 4, Keelung Rd, Taipei 106, Taiwan, ROC
| | - Jui-Ming Yeh
- Department of Chemistry, Chung-Yuan Christian University, Chung Li, Taoyuan County 32023, Taiwan, ROC
| | - Cai-Shan Zhuang
- Department of Chemical Engineering, Feng Chia University, 100, Wenhwa Road, Seatwen, Taichung 40724, Taiwan, ROC
| | - Ming-Ching Lee
- Department of Surgery, Taichung Veterans General Hospital, 1650 Taiwan Boulevard Section 4, Taichung, 40705, Taiwan, ROC
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A novel fluorescent labeling reagent, 2-(9-acridone)-ethyl chloroformate, and its application to the analysis of free amino acids in honey samples by HPLC with fluorescence detection and identification with online ESI-MS. Anal Bioanal Chem 2020; 412:8339-8350. [PMID: 33029671 DOI: 10.1007/s00216-020-02969-y] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2020] [Revised: 09/15/2020] [Accepted: 09/22/2020] [Indexed: 10/23/2022]
Abstract
In this study, a novel fluorescent labeling reagent 2-(9-acridone)-ethyl chloroformate (AEC-Cl) was designed, synthesized and applied for the determination of free amino acids by high-performance liquid chromatography with a fluorescence detector (HPLC-FLD). The free amino acids were rapidly and efficiently labeled by AEC-Cl in the presence of basic catalyst (pH 9.0) within 5 min at room temperature (25 °C). The derivatives exhibited excellent stability and fluorescence properties, with maximum excitation and emission wavelengths at 268 nm and 438 nm, respectively. Derivatives of 22 kinds of natural amino acids were completely separated by gradient elution on a Hypersil ODS C18 column. Under the optimal conditions, the calibration curves exhibited excellent linear responses, with correlation coefficients of R2 > 0.9994. The detection and quantification limits were in the range of 0.61-2.67 μg kg-1 and 2.07-8.35 μg kg-1, respectively. Therefore, AEC-Cl was successfully applied for the detection of trace levels of free amino acids in honey samples. Graphical abstract A novel fluorescent labeling reagent was applied for the determination of free amino acids in honey by high-performance liquid chromatography with a fluorescence detector.
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7
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Kato Y, Kishi Y, Okano Y, Kawai M, Shimizu M, Suga N, Yakemoto C, Kato M, Nagata A, Miyoshi N. Methylglyoxal binds to amines in honey matrix and 2'-methoxyacetophenone is released in gaseous form into the headspace on the heating of manuka honey. Food Chem 2020; 337:127789. [PMID: 32795863 DOI: 10.1016/j.foodchem.2020.127789] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/09/2020] [Revised: 07/31/2020] [Accepted: 08/04/2020] [Indexed: 10/23/2022]
Abstract
Reports on the thermal stability of manuka honey in terms of food processing have been few. This study investigated changes in nine characteristic chemicals of manuka honey during heating. Among these, methylglyoxal (MGO) and 2'-methoxyacetophenone (MAP) were significantly decreased by heating at 90 °C. To elucidate the mechanism for this decrease, artificial honey was prepared from sugars and water with MAP or MGO and then heated. The decrease of MGO was enhanced with l-proline, lysine, or arginine derivatives, accompanied by formation of 2-acetyl-1-pyrroline, MGO-derived lysine dimer, or argpyrimidine, respectively, suggesting that an amino-carbonyl reaction is one pathway for the loss of MGO. The decrease of MAP in the artificial honey depended on the volume of headspace in a vessel. MAP from heated manuka honey was also detected in the gas phase, indicating that MAP was vaporized. Heating could thus reduce the beneficial and/or signature molecules in honey.
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Affiliation(s)
- Yoji Kato
- School of Human Science and Environment, University of Hyogo, Himeji, Hyogo 670-0092, Japan; Research Institute for Food and Nutritional Sciences, University of Hyogo, Himeji, Hyogo 670-0092, Japan.
| | - Yui Kishi
- School of Human Science and Environment, University of Hyogo, Himeji, Hyogo 670-0092, Japan
| | - Yayako Okano
- School of Human Science and Environment, University of Hyogo, Himeji, Hyogo 670-0092, Japan
| | - Masaki Kawai
- School of Human Science and Environment, University of Hyogo, Himeji, Hyogo 670-0092, Japan
| | - Michiyo Shimizu
- School of Human Science and Environment, University of Hyogo, Himeji, Hyogo 670-0092, Japan
| | - Naoko Suga
- School of Human Science and Environment, University of Hyogo, Himeji, Hyogo 670-0092, Japan
| | - Chisato Yakemoto
- School of Human Science and Environment, University of Hyogo, Himeji, Hyogo 670-0092, Japan
| | - Mai Kato
- School of Food and Nutritional Sciences, University of Shizuoka, Yada, Suruga-ku, Shizuoka 422-8526, Japan
| | - Akika Nagata
- School of Food and Nutritional Sciences, University of Shizuoka, Yada, Suruga-ku, Shizuoka 422-8526, Japan
| | - Noriyuki Miyoshi
- School of Food and Nutritional Sciences, University of Shizuoka, Yada, Suruga-ku, Shizuoka 422-8526, Japan
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8
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Combination of an AccQ•Tag-Ultra-Performance Liquid Chromatographic Method with Tandem Mass Spectrometry for the Analysis of Amino Acids. Methods Mol Biol 2019. [PMID: 31347119 DOI: 10.1007/978-1-4939-9639-1_15] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register]
Abstract
Amino acid analysis is a powerful tool in life sciences. Current analytical methods used for the detection and quantitation of low abundance amino acids in complex samples face intrinsic challenges such as insufficient sensitivity, selectivity, and throughput. This chapter describes a protocol that makes use of AccQ•Tag chemical derivatization combined with the exceptional chromatographic resolution of ultra-performance liquid chromatography (UPLC) and the sensitivity and selectivity of tandem mass spectrometry (MS/MS). The method has been fully implemented and validated using different tandem quadrupole detectors and thoroughly tested for a variety of samples such as P. falciparum, human red blood cells, and Arabidopsis thaliana extracts. Compared to currently available methods for amino acid analysis, the AccQ•Tag UPLC-MS/MS method presented here provides enhanced sensitivity and reproducibility and offers excellent performance within a short analysis time and a broad dynamic range of analyte concentration. The focus of this chapter is the application of this improved protocol for the compositional amino acid analysis in Arabidopsis thaliana leaf extracts using the Xevo TQ for mass spectrometric detection.
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9
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Terriente-Palacios C, Diaz I, Castellari M. A validated ultra-performance liquid chromatography with diode array detection coupled to electrospray ionization and triple quadrupole mass spectrometry method to simultaneously quantify taurine, homotaurine, hypotaurine and amino acids in macro- and microalgae. J Chromatogr A 2019; 1589:83-92. [DOI: 10.1016/j.chroma.2018.12.058] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2018] [Revised: 12/19/2018] [Accepted: 12/26/2018] [Indexed: 12/19/2022]
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10
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Rückriemen J, Schwarzenbolz U, Adam S, Henle T. Identification and Quantitation of 2-Acetyl-1-pyrroline in Manuka Honey (Leptospermum scoparium). JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2015; 63:8488-8492. [PMID: 26365614 DOI: 10.1021/acs.jafc.5b03042] [Citation(s) in RCA: 12] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/05/2023]
Abstract
Manuka honey from New Zealand is known for its exceptional antibacterial activity, which is due to high amounts of the 1,2-dicarbonyl compound methylglyoxal (MGO). MGO in manuka honey is formed via non-enzymatic dehydration from dihydroxyacetone (DHA) during honey maturation. MGO and DHA are highly reactive substances, leading to a variety of unique chemical reactions. During Strecker reaction between proline and MGO, 2-acetyl-1-pyrroline (2-AP), an important aroma compound, is formed. Using liquid-liquid extraction and gas chromatography-mass spectrometry analysis, 2-AP was identified unambiguously in manuka honey for the first time. Quantitation was carried out via external matrix calibration, using a synthetic 2-AP standard and artificial honey. The 2-AP concentration in 11 commercial samples of manuka honey ranged from 0.08 to 0.45 mg/kg. For manuka honey samples containing MGO in concentrations above 250 mg/kg, significantly higher amounts of 2-AP were found when compared to non-manuka honeys. When high amounts of MGO were artificially added to non-manuka multifloral honey, an increase of the 2-AP concentration from 0.07 to 0.40 mg/kg after 12 weeks of storage at 37 °C was observed, concomitant with a significant increase in the concentration of 5-hydroxymethylfurfural (HMF). No increase of 2-AP was found during storage at ambient temperature. 2-AP together with MGO can be a suitable parameter for the quality control of manuka honey.
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Affiliation(s)
- Jana Rückriemen
- Institute of Food Chemistry, Technische Universität Dresden , D-01062 Dresden, Germany
| | - Uwe Schwarzenbolz
- Institute of Food Chemistry, Technische Universität Dresden , D-01062 Dresden, Germany
| | - Simone Adam
- Institute of Food Chemistry, Technische Universität Dresden , D-01062 Dresden, Germany
| | - Thomas Henle
- Institute of Food Chemistry, Technische Universität Dresden , D-01062 Dresden, Germany
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12
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Deibel E, Klink D, Schmitz OJ. New derivatization strategies for the ultrasensitive analysis of non-aromatic analytes with APLI-TOF-MS. Anal Bioanal Chem 2015. [DOI: 10.1007/s00216-015-8908-7] [Citation(s) in RCA: 5] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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13
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Boonchiangma S, Ratchakrut P, Chanthai S, Srijaranai S. Reversed Phase Chromatographic Analysis of 13 Amino Acids in Honey Samples. Chromatographia 2015. [DOI: 10.1007/s10337-015-2894-y] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/23/2022]
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14
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Ma X, Zhao D, Li X, Meng L. Chromatographic method for determination of the free amino acid content of chamomile flowers. Pharmacogn Mag 2015; 11:176-9. [PMID: 25709230 PMCID: PMC4329621 DOI: 10.4103/0973-1296.149735] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/07/2013] [Revised: 01/10/2013] [Accepted: 01/21/2015] [Indexed: 12/02/2022] Open
Abstract
Objective: To determine the free amino acid contents of chamomile flowers using reverse-phase high-performance column chromatography preceded by pre-column derivatization with 6-aminoquinolyl-N-hydroxysuccinimidyl carbamate (AQC), and to determine the reliability of this method. Materials and Methods: Derivatization with reconstituted AQC was used to prepare the samples and standards for injection into the chromatography column. The peaks were analyzed by fluorescence detection (λ excitation, 250 nm; λ emission, 395 nm. Results: Alanine, proline, and leucine were the most abundant amino acids, whereas tyrosine and methionine were the least abundant. The linearity of the method was found to be good with amino acid concentrations of 0.012-0.36 μM. The precision was 0.05-1.36%; average recovery, 91.12-129.41%; and limit of detection, 0.006-0.058 μM. Conclusion: The method is reliable for determining the free amino acid content of different types of chamomile flowers.
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Affiliation(s)
- Xiaoli Ma
- Analytical and Testing Center, School of Pharmacy, Xinjiang Medical University, Urumqi, Xiangjiang, China
| | - Dongsheng Zhao
- Analytical and Testing Center, School of Pharmacy, Xinjiang Medical University, Urumqi, Xiangjiang, China
| | - Xinxia Li
- Analytical and Testing Center, School of Pharmacy, Xinjiang Medical University, Urumqi, Xiangjiang, China
| | - Lei Meng
- Analytical and Testing Center, School of Pharmacy, Xinjiang Medical University, Urumqi, Xiangjiang, China
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15
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Study of the matrix effects and sample dilution influence on the LC–ESI–MS/MS analysis using four derivatization reagents. J Chromatogr B Analyt Technol Biomed Life Sci 2014; 967:147-55. [DOI: 10.1016/j.jchromb.2014.07.027] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/31/2014] [Revised: 07/15/2014] [Accepted: 07/16/2014] [Indexed: 01/11/2023]
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16
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Silici S, Karaman K. CHEMOMETRIC APPROACHES FOR THE CHARACTERIZATION OF TURKISH RHODODENDRON AND HONEYDEW HONEYS DEPENDING ON AMINO ACID COMPOSITION. J LIQ CHROMATOGR R T 2014. [DOI: 10.1080/10826076.2012.758149] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/25/2022]
Affiliation(s)
- Sibel Silici
- a Department of Agricultural Biotechnology , Faculty of Agriculture, Erciyes University , Kayseri , Turkey
| | - Kevser Karaman
- a Department of Agricultural Biotechnology , Faculty of Agriculture, Erciyes University , Kayseri , Turkey
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17
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Wang H, McNeil YR, Yeo TW, Anstey NM. Simultaneous determination of multiple amino acids in plasma in critical illness by high performance liquid chromatography with ultraviolet and fluorescence detection. J Chromatogr B Analyt Technol Biomed Life Sci 2013; 940:53-8. [PMID: 24145014 DOI: 10.1016/j.jchromb.2013.09.016] [Citation(s) in RCA: 34] [Impact Index Per Article: 3.1] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/08/2013] [Revised: 09/12/2013] [Accepted: 09/12/2013] [Indexed: 12/26/2022]
Abstract
There is increasing recognition that the host response to critical illness includes derangement of multiple amino acid pathways, including amino acids (AAs) central to metabolism and immune, endothelial and neurological function. To characterise concentration changes of these plasma amino acid we report the development and validation of a method for the quantification of AAs in small volumes of plasma (50μL) using HPLC with simultaneous UV and fluorescence (FL) detection. Protein precipitation and pre-column derivatization with 6-aminoquinolyl-N-hydroxysuccinimidyl carbamate (AQC) is followed by reversed phase HPLC separation. Calibration curves were built with norleucine as an internal standard. Thirty-three (including the 20 proteinogenic) AAs, were selected as standards and their corresponding concentrations in the plasma of healthy human controls and patients with severe falciparum malaria were quantified. This method enables the detection of perturbations in arginine metabolism, aromatic amino acid pathways, methionine transsulfuration and transmethylation pathways and other metabolic pathways.
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Affiliation(s)
- Hao Wang
- Menzies School of Health Research and Charles Darwin University, Rocklands Drive, Tiwi, Darwin, NT, Australia.
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18
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Enantioseparation of 6-aminoquinolyl-N-hydroxysuccinimidyl carbamate tagged amino acids and other zwitterionic compounds on cinchona-based chiral stationary phases. Anal Bioanal Chem 2013; 405:8105-20. [DOI: 10.1007/s00216-013-7121-9] [Citation(s) in RCA: 19] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2013] [Revised: 05/27/2013] [Accepted: 06/05/2013] [Indexed: 11/25/2022]
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19
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Analysis of free amino acids during fermentation by Bacillus subtilis using capillary electrophoresis. BIOTECHNOL BIOPROC E 2013. [DOI: 10.1007/s12257-012-0292-y] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 10/27/2022]
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20
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Rebane R, Oldekop ML, Herodes K. Comparison of amino acid derivatization reagents for LC–ESI-MS analysis. Introducing a novel phosphazene-based derivatization reagent. J Chromatogr B Analyt Technol Biomed Life Sci 2012; 904:99-106. [DOI: 10.1016/j.jchromb.2012.07.029] [Citation(s) in RCA: 33] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2012] [Revised: 07/09/2012] [Accepted: 07/25/2012] [Indexed: 10/28/2022]
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21
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Rebane R, Herodes K. Comparison of three buffer solutions for amino acid derivatization and following analysis by liquid chromatography electrospray mass spectrometry. J Chromatogr A 2012; 1245:134-42. [PMID: 22673814 DOI: 10.1016/j.chroma.2012.05.039] [Citation(s) in RCA: 22] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/09/2011] [Revised: 05/08/2012] [Accepted: 05/10/2012] [Indexed: 10/28/2022]
Abstract
For reversed phase separation amino acids are usually derivatized. Several derivatization reactions are carried out at basic pH. In the present work, influence of three basic buffer solutions on liquid chromatography electrospray ionization mass-spectrometric (LC-ESI-MS) analysis of amino acid derivatives was studied. Borate buffer--the most common derivatization buffer--was found to influence ESI ionization up to 23 min retention time. For 9-fluorenylmethylmethoxycarbonyl chloride (Fmoc-Cl derivatization) carbonate buffer should be preferred as it provides higher responses. Hexafluoroisopropanol (HFIP) buffer improves chromatographic peak shapes and responses for diethyl ethoxymethylenemalonate (DEEMM) derivatives.
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Affiliation(s)
- Riin Rebane
- Institute of Chemistry, University of Tartu, Ravila 14a, 50411 Tartu, Estonia
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22
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Combination of an AccQ·Tag-ultra performance liquid chromatographic method with tandem mass spectrometry for the analysis of amino acids. Methods Mol Biol 2012; 828:13-28. [PMID: 22125132 DOI: 10.1007/978-1-61779-445-2_2] [Citation(s) in RCA: 36] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/04/2022]
Abstract
Amino acid analysis is a powerful tool in life sciences. Current analytical methods used for the detection and quantitation of low abundance amino acids in complex samples face intrinsic challenges such as insufficient sensitivity, selectivity, and throughput. This chapter describes a protocol that makes use of AccQ∙Tag chemical derivatization combined with the exceptional chromatographic resolution of ultra performance liquid chromatography (UPLC), and the sensitivity and selectivity of tandem mass spectrometry (MS/MS). The method has been fully implemented and validated using different tandem quadrupole detectors, and thoroughly tested for a variety of samples such as Plasmodium falciparum, human red blood cells, and Arabidopsis thaliana extracts. Compared to currently available methods for amino acid analysis, the AccQ∙Tag UPLC-MS/MS method presented here provides enhanced sensitivity and reproducibility, and offers excellent performance within a short analysis time and a broad dynamic range of analyte concentration. The focus of this chapter is the application of this improved protocol for the compositional amino acid analysis in A. thaliana leaf extracts using the Xevo TQ for mass spectrometric detection.
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23
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Rebane R, Herodes K. A sensitive method for free amino acids analysis by liquid chromatography with ultraviolet and mass spectrometric detection using precolumn derivatization with diethyl ethoxymethylenemalonate: Application to the honey analysis. Anal Chim Acta 2010; 672:79-84. [DOI: 10.1016/j.aca.2010.04.014] [Citation(s) in RCA: 63] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2009] [Revised: 03/31/2010] [Accepted: 04/03/2010] [Indexed: 10/19/2022]
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24
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Stefan-van Staden RI. Enantioanalysis of d-histidine based on its interaction with [5,6]fullerene-C70 and diethyl (1,2-methanofullerene-C70)-71,71-dicarboxylate. NEW J CHEM 2010. [DOI: 10.1039/b9nj00583h] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/21/2022]
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25
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Sánchez-Machado D, Chavira-Willys B, López-Cervantes J. High-performance liquid chromatography with fluorescence detection for quantitation of tryptophan and tyrosine in a shrimp waste protein concentrate. J Chromatogr B Analyt Technol Biomed Life Sci 2008; 863:88-93. [DOI: 10.1016/j.jchromb.2008.01.011] [Citation(s) in RCA: 34] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/11/2007] [Revised: 12/05/2007] [Accepted: 01/04/2008] [Indexed: 10/22/2022]
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26
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Mohabbat T, Drew B. Simultaneous determination of 33 amino acids and dipeptides in spent cell culture media by gas chromatography-flame ionization detection following liquid and solid phase extraction. J Chromatogr B Analyt Technol Biomed Life Sci 2008; 862:86-92. [DOI: 10.1016/j.jchromb.2007.11.003] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/08/2007] [Revised: 09/25/2007] [Accepted: 11/05/2007] [Indexed: 11/16/2022]
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27
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Alissandrakis E, Tarantilis PA, Harizanis PC, Polissiou M. Comparison of the volatile composition in thyme honeys from several origins in Greece. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2007; 55:8152-7. [PMID: 17824662 DOI: 10.1021/jf071442y] [Citation(s) in RCA: 85] [Impact Index Per Article: 5.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 05/17/2023]
Abstract
Thyme honey is the most appreciated unifloral Greek honey in Greece as well as around the world. In an effort to investigate the headspace composition of this type of honey, 28 samples were analyzed by means of solid-phase microextraction coupled to a gas chromatography-mass spectrometry system. The botanical origin of the samples was ascertained by pollen analysis, and samples displayed relative frequencies of thyme pollen between 18 and 41%. A total of 62 compounds were isolated, and phenylacetaldehyde was the most abundant (32.9% of the total peak area). Possible botanical markers are 1-phenyl-2,3-butanedione (13.4%), 3-hydroxy-4-phenyl-2-butanone, 3-hydroxy-1-phenyl-2-butanone (14.7%), phenylacetonitrile (4.8%), and carvacrol (0.9%), since these compounds are found only in thyme honey. Additionally, high proportions of phenylacetaldehyde are also characteristic ( F = 12.282, p < 0.001). The average concentrations of seven compounds were significantly different ( p < 0.05), namely phenylacetaldehyde, acetophenone, octanoic acid, carvacrol, phenylethyl alcohol, nonanal, and hexadecane. Applying principal component analysis to the data, six components were extracted, explaining 85.4% of the total variance. The first component explained 46.2% of the total variance and was positively correlated to phenylacetaldehyde, nonanoic acid, acetophenone, decanoic acid, benzaldehyde, phenylacetonitrile, isophorone, and nonanal. The extracted components were used as variables to the discriminant analysis, which showed good discrimination, especially for samples from Crete. A leave-one-out classification showed 85.7% of cross-validated grouped cases correctly classified. These results are promising to establish a discrimination model for these geographical regions. This is crucial for local beekeeper corporations on their effort to produce honey with geographical origin label.
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Affiliation(s)
- Eleftherios Alissandrakis
- Laboratory of Sericulture and Apiculture, Agricultural University of Athens, 75 Iera Odos St., 118 55 Athens, Greece
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28
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Arráez-Román D, Gómez-Caravaca AM, Gómez-Romero M, Segura-Carretero A, Fernández-Gutiérrez A. Identification of phenolic compounds in rosemary honey using solid-phase extraction by capillary electrophoresis-electrospray ionization-mass spectrometry. J Pharm Biomed Anal 2006; 41:1648-56. [PMID: 16574364 DOI: 10.1016/j.jpba.2006.02.035] [Citation(s) in RCA: 47] [Impact Index Per Article: 2.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/30/2005] [Revised: 02/17/2006] [Accepted: 02/18/2006] [Indexed: 11/16/2022]
Abstract
Complex extracts of rosemary honey constituents often require very effective separation techniques to allow the identification of different compounds. Capillary electrophoresis (CE) coupled to mass spectrometry (MS) detection can provide structure-selective information about the analytes in such matrices and has turned out to be an attractive alternative to HPLC methods. A simple and cost-effective analytical method involving solid-phase extraction (SPE) and capillary zone electrophoresis coupled to electrospray ionization-ion trap mass spectrometry (CZE-ESI-MS) to identify and characterize phenolic compounds in rosemary honey is described. The SPE, CE and ESI-MS parameters were optimized in order to maximize the number of phenolic compounds detected and the sensitivity of their determination. All CE-ESI-MS experiments were performed with uncoated fused-silica capillaries and an alkaline volatile buffer system consisting of 100 mM NH(4)Oac with 10% of 2-propanol at pH 10. Since sheath liquids can made significant effects on the sensitivity in typical CE-ESI-MS application, the effect of type and flow rate of the sheath liquid on the sensitivity of phenolic compounds were investigated. As result, the best sensitivity was obtained with a sheath liquid containing 2-propanol/water 60:40 (v/v) and 0.1% (v/v) of triethylamine at 3 microL/min in the negative ion mode. We describe the first method for the analysis of phenolic compounds in rosemary honey at mg/L levels by using a simple SPE before CE-ESI-MS analysis.
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Affiliation(s)
- D Arráez-Román
- Department of Analytical Chemistry, Faculty of Sciences, University of Granada, C/Fuentenueva s/n, E-18071 Granada, Spain
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