作者：张毅, 方正, 张苏敏, 王彧婕, 潘义

作者单位：中国测试技术研究院, 四川成都 610021

关键词：气相色谱; 氩气; 微量氮; 分析; 脉冲放电氦离子检测器

摘要：

针对高纯氩气中存在着微量氮难以分析的问题,采用脉冲放电氦离子检测器气相色谱法(简称PDHID-GC)测定氩气中微量氮。该方法采用六通阀进样,检测器温度250℃,高纯氦气做载气,氮浓度在5 mol/mol~50 mol/mol时,标准曲线线性良好,测定了氩气中微量氮气体标准物质GBW 06309,结果与标准值基本一致,表明该方法操作简便、准确度高。

Determination of traceable nitrogen in argon with PDHID-GC

ZHANG Yi, FANG Zheng, ZHANG Su-min, WANG Yu-jie, PAN Yi

National Institute of Measurement and Testing Technology, Chengdu 610021, China

Abstract: At present, it is difficult to detect the traceable nitrogen of high purity argon. To solve that problem, one new method has been developed. In that method, gas chromatography with pulsed discharge helium ionization detector(PDHID-GC) is used to determine the traceable nitrogen, gas is sampled into chromatograph through a six-port valve and high purity helium is used as carrier gas, and the temperature of detector is set to 250℃. When the nitrogen concentration interval is 5 μmol/mol~50 μmol/mol, the regression of response-concentration shows good linearity. To verify the presented method, GBW06309, the primary reference material of traceable nitrogen in argon is analyzed, and the nitrogen content is in good agreement with its certified value. All above indicate this method is easy to use and reliable.

Keywords: Gas chromatogram; Argon; Traceable nitrogen; Analysis; PDHID

2009, 35(3): 87-89  收稿日期: 2008-10-9;收到修改稿日期: 2008-12-17

基金项目: 

作者简介: 张毅(1964-),男,四川成都市人,工程师,主要从事气体分析研究及科研工作。

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