热电离质谱仪谱峰拖尾原因分析及消除措施  

Origins of Strong Peak Tailing and Elimination Measures for Isotopic Abundance Measurement by Thermal Ionization Mass Spectrometry

作　　者：袁莉[1] 魏兴俭[1] 张海路[1] 

机构地区：[1]中国工程物理研究院,四川绵阳621900

出　　处：《核化学与放射化学》2013年第1期61-64,共4页Journal of Nuclear and Radiochemistry

摘　　要：针对热电离质谱仪由于强峰拖尾造成同位素比值测定结果不准确的问题,对谱峰产生拖尾的影响因素进行了分析,并提出了解决措施。结果表明:通过采取对离子源和法拉第接收杯进行清洗、以及对分析管道进行烘烤等措施可以减小谱峰拖尾,从而提高同位素丰度测量的准确性。In isotopic abundance analysis using thermal ionization mass spectrometry, tailing effect of strong peaks decreases the abundance sensitivity and leads to a poor accuracy of isotopic ratios. In order to solve the problem, the spectral peak tailing contribution factorswere discussed and some measures to avoid or eliminate the strong peak tailing were proposed. The reslts show that the tailing effect can be eliminated to a degree by improving the system＇s vacuum via washing the ionic source and the Faraday collectors, and baking the analytic tube, resulting in the improvement of abundance sensitivity of the mass spectrometer.

关 键 词：热电离质谱仪 强峰拖尾 丰度灵敏度 

分 类 号：O657.63[理学—分析化学]