期刊
JOURNAL OF AOAC INTERNATIONAL
卷 96, 期 2, 页码 353-356出版社
AOAC INT
DOI: 10.5740/jaoacint.12-160
关键词
-
资金
- Modern Agricultural Technology System Project, People's Republic of China [nycytx-18-G15-03]
Ambient ionization direct analysis in real time (DART) coupled to single-quadrupole MS (DART-MS) was evaluated for rapid detection of caffeine in commercial samples without chromatographic separation or sample preparation. Four commercial samples were examined: tea, instant coffee, green tea beverage, and soft drink. The response-related parameters were optimized for the DART temperature and MS fragmentor. Under optimal conditions, the molecular ion (M+H)(+) was the major ion for identification of caffeine. The results showed that DART-MS is a promising tool for the quick analysis of important marker molecules in commercial samples. Furthermore, this system has demonstrated significant potential for high sample throughput and real-time analysis.
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