质谱学报2011，Vol.32Issue(2)：95-99,5.
MAT261质谱计二次电子倍增器歧视效应研究和计数法建立
Studies on the Discrimination Effect of Secondary Electron Multiplier(SEM) for MAT261 Thermal Ionization Mass Spectrometry and the Establishment of Count Mode of SEM
徐江 1徐宗浩 1王群书 1李志明 1朱凤蓉 1张佳梅 1翟利华 1万可友 1周国庆 1王伟 1邓虎1
作者信息
- 1. 西北核技术研究所,陕西,西安,710024
- 折叠
摘要
Abstract
Mass discrimination effect and ions intensity-dependent discrimination effect of secondary electron multiplier (SEM) in analog mode for MAT261 thermal ionization mass spectrometry (TIMS) were carried out. Mass discrimination factor were determined accurately and the measurement conditions under which ions intensity-dependent discrimination effect could be ignored were obtained. Moreover, the count mode of SEM was established for accurate measurement of weak signal. Comparison with the two modes, which were finished using standard solution of plutonium. The results from analog mode corrected by mass discrimination effect and directly from count mode of SEM respectively agree well with the nominal value. It means that accurate analysis of weak signal can be achieved using the established count mode of SEM.关键词
计数法/二次电子倍增器/质量歧视效应/强度歧视效应分类
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徐江,徐宗浩,王群书,李志明,朱凤蓉,张佳梅,翟利华,万可友,周国庆,王伟,邓虎..MAT261质谱计二次电子倍增器歧视效应研究和计数法建立[J].质谱学报,2011,32(2):95-99,5.
