Analyzing Citramalic Acid Enantiomers in Apples and Commercial Fruit Juice by Liquid Chromatography-Tandem Mass Spectrometry with Pre-Column Derivatization.
Maho UminoMayu OnozatoTatsuya SakamotoMikoto KoishiTakeshi FukushimaPublished in: Molecules (Basel, Switzerland) (2023)
Optically active citramalic acid (CMA) is naturally present as an acidic taste component in fruits, such as apples. The absolute configuration of CMA in such fruits was investigated by high-performance liquid chromatography-tandem mass spectrometry (LC-MS/MS) following pre-column derivatization with a chiral reagent, benzyl 5-(2-aminoethyl)-3-methyl-4-oxoimidazolidine-1-carboxylate. The developed LC-MS/MS method successfully separated the enantiomers of CMA using an octadecylsilica column with a resolution and separation factor of 2.19 and 1.09, respectively. Consequently, the R -form of CMA was detected in the peel and fruit of three kinds of apple at concentrations in the 1.24-37.8 and 0.138-1.033 mg/wet 100 g ranges, respectively. In addition, R - CMA was present in commercial apple juice, whereas no quantity was detected in commercial blueberry, perilla, or Japanese apricot juice.
Keyphrases
- liquid chromatography tandem mass spectrometry
- solid phase extraction
- liquid chromatography
- simultaneous determination
- high performance liquid chromatography
- tandem mass spectrometry
- mass spectrometry
- ms ms
- gas chromatography mass spectrometry
- capillary electrophoresis
- ultra high performance liquid chromatography
- high resolution mass spectrometry
- gas chromatography
- ionic liquid
- high speed