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  • 한국과학기술정보연구원(KISTI) 서울분원 대회의실(별관 3층)
  • 2024년 07월 03일(수) 13:30
 

  • P-ISSN1225-0163
  • E-ISSN2288-8985
  • SCOPUS, ESCI, KCI

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  • P-ISSN 1225-0163
  • E-ISSN 2288-8985

Identification of triacylglycerols in coix seed extract by preparative thin layer chromatography and liquid chromatography atmospheric pressure chemical ionization tandem mass spectrometry

분석과학 / Analytical Science and Technology, (P)1225-0163; (E)2288-8985
2017, v.30 no.2, pp.102-111
https://doi.org/10.5806/AST.2017.30.2.102
심희정 (경희대학교)
홍종기 (경희대학교)
이슬기 (경희대학교)
박나현 (경희대학교)
김윤아 (경희대학교)
조현우 (경기대학교)
  • 다운로드 수
  • 조회수

Abstract

Here we reported a methodology for identification of triacylglycerols (TAGs) and diacylglycerols (DAGs) in coix seed by preparative thin layer chromatography (prep-TLC) and non-aqueous reversed-phase liquid chromatography (NARP LC)-atmospheric pressure chemical ionization (APCI) tandem mass spectrometry (MS/MS). Lipid components were extracted from coix seed by reflux extraction using n-hexane for 3 hr. TAGs and DAGs in coix seed extract were effectively purified and isolated from matrix interferences by prep-TLC and then analyzed by LC-APCI-MS and MS/MS for identification. TAGs were effectively identified taking into consideration of their LC retention behavior, APCI-MS spectra patterns, and MS/MS spectra of [DAG]+ ions. In MS/MS spectra of TAGs, diacylglycerol-like fragment [DAG]+ ions were useful to identify TAGs with isobaric fragment ions. Based on an established method, 27 TAGs and 8 DAGs were identified in coix seed extract. Among them, 15 TAGs and 8 DAGs were for the first time observed in coix seed. Interestingly, some of TAGs isolated by prep-TLC were partly converted into DAGs through probably photolysis process during storing in room temperature. Thus, degradation phenomenon of TAGs should be considered in the quality evaluation and nutritional property of coix seed. LC-APCI-MS/MS combined with prep-TLC will be practical method for precise TAG and DAG analysis of other herbal plants.

keywords
triacylglycerol, diacylglycerol, coix seed, Prep-TLC, LC-APCI-MS/MS


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