摘要
在烃类天然气中 ,由于稀有气体的含量很微 ,所以其同位素组成的检测相对较困难。要实现稀有气体同位素的准确测量 ,还必需排除诸多的干扰因素。本文作者根据多年的实践经验和理论分析 ,认为影响烃类天然气中稀有气体同位素准确测量的干扰主要有 :离子碎片迭加、不同样品中稀有气体组分含量及其同位素组成的巨大差异、仪器系统的本底、漏率和吸附分馏等因素。本文还针对性地提出了相应的控制措施。
The measurement of the noble gas isotopes in hydrocarbon natural gases is relatively difficult because their content is very low.In order to reach the accurate values of noble gas isotopes,it is necessary to pay attention to eliminating a lot of interferences.According to work experiences and theoretical analysis,the author suggests that the main factors,interfering the accurate measure ments of the noble gas isotopes for specimens of hydrocarbon natural gases,include that:additional ion fragments,very large contents differences,wide isotope differences of noble gases in different samples.In addition,disturbances of the background of instrument system,leaks and the gas release from materials,etc.Should be also considered for isotopic analysis of noble gases.Furthermore,a series of useful methods are presented to eliminate the interferences and to control the disturbance.
出处
《质谱学报》
EI
CAS
CSCD
2001年第2期46-52,共7页
Journal of Chinese Mass Spectrometry Society
关键词
烃类天然气
稀有气体
同位素
干扰因素
测量
消除途径
noble gas isotopes,aceurate measurements,natural gases,interferences and disturbance,elimination
