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논문 기본 정보

자료유형
학술저널
저자정보
Hee-Jung Sim (Kyung Hee University) Seul gi Lee (Kyung Hee University) Na-Hyun Park (Kyung Hee University) Youna Kim (Kyung Hee University) Hyun-Woo Cho (Kyonggi University) Jongki Hong (Kyung Hee University)
저널정보
한국분석과학회 분석과학 분석과학 제30권 제2호
발행연도
2017.4
수록면
102 - 111 (10page)

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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]<SUP>+</SUP> ions. In MS/MS spectra of TAGs, diacylglycerol-like fragment [DAG]<SUP>+</SUP> 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.

목차

Abstact
1. Introduction
2. Materials and Methods
3. Results and Discussion
4. Conclusions
References

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