Rapid differentiation of tea products by surface desorption atmospheric pressure chemical ionization mass spectrometry
作者： Huanwen Chen , Huazheng Liang , Jianhua Ding , Jinhu Lai , Yanfu Huan
DOI: 10.1021/JF0720234
关键词:
摘要: Protonated water molecules generated by an ambient corona discharge were directed to impact tea leaves for desorption/ionization at atmospheric pressure. Thus, a novel method based on surface desorption chemical ionization mass spectrometry (DAPCI-MS) has been developed rapid analysis of products without any sample pretreatment. Under the optimized experimental conditions, DAPCI MS spectra various samples are recorded rapidly, and resulting fingerprints that characterize samples. On basis spectral fingerprints, 40 including green tea, oolong jasmine successfully differentiated principal component (PCA) raw data. The PCA results also validated with cluster supervised analysis. alteration signal intensity caused rough surfaces did not cause failure in separation products. findings show DAPCI-MS creates ions both volatile nonvolatile compounds pressure, providing practical convenient tool high-throughput differentiation
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