【摘 要】
:
Ambient ionization mass spectrometry can usually meet the requirements for rapid and direct screening of analytes in urine, saliva, plasma, skin and hair.l-
【机 构】
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Key Laboratory of Analytical Chemistry for Biology and Medicine (Ministry of Education), Department
【出 处】
:
第2届大连国际色谱学术报告会、第37届国际高效液相色谱及相关技术会议、第18届全国色谱学术报告会
论文部分内容阅读
Ambient ionization mass spectrometry can usually meet the requirements for rapid and direct screening of analytes in urine, saliva, plasma, skin and hair.l-3 However, some practical problems still exist in the application of this popular technique.For instance, it is still difficult to apply these ion sources directly for determination of organic substances in complex background without sample preparation or high performance separation steps.We have developed a convenient method by coupling frontal elution paper chromatography and desorption corona beam ionization mass spectrometry (DCBI-MS) for rapid determination of chlorphenamine added in herbal medicines or dietary supplements.According to this method, the alcohol extract of the herbal products was spotted directly to an isosceles triangular filter paper sheet, and then the paper sheet was developed under strong elution condition with the sample zone migrating at the solvent front.The analyte was finally condensed at the V-shaped tip which could be then placed under the visible plasma beam of DCBI for ionization.
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