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.
出处
《核化学与放射化学》
CAS
CSCD
北大核心
2013年第1期61-64,共4页
Journal of Nuclear and Radiochemistry
关键词
热电离质谱仪
强峰拖尾
丰度灵敏度
thermal ionization mass spectrometry（TIMS） strong peak tailing
abundancesensitivity
