直接进样气相色谱-质谱法分析大气中的氪和氙

引用本文: 陈占营, 刘蜀疆, 王建龙, 常印忠. 直接进样气相色谱-质谱法分析大气中的氪和氙[J]. 分析化学, 2016, 44(3): 468-473. doi: 10.11895/j.issn.0253-3820.150750 shu

Citation: CHEN Zhan-Ying, LIU Shu-Jiang, WANG Jian-Long, CHANG Yin-Zhong. Determination of Atmospheric Krypton and Xenon by Gas Chromatography-Mass Spectrometry in Direct Injection Mode[J]. Chinese Journal of Analytical Chemistry, 2016, 44(3): 468-473. doi: 10.11895/j.issn.0253-3820.150750 shu

直接进样气相色谱-质谱法分析大气中的氪和氙

1.
¹ 清华大学核能与新能源技术研究院先进核能技术协同创新中心, 北京 100084;
2.
² 禁核试北京国家数据中心和放射性核素实验室, 北京 100085;
3.
³ 放射性废物处理北京市重点实验室, 清华大学, 北京 100084

通讯作者: 王建龙

基金项目:
本文系教育部博士点基金(No.20130002130012) (No.20130002130012)

长江学者和创新团队发展计划资助(IRT-13026)项目 (IRT-13026)

摘要: 大气中氪和氙体积比浓度的测量对于氪-85和放射性氙同位素监测具有重要意义。本实验设计了一套集成定量稀释功能的可调样量进样装置,对质谱检测器的工作参数进行了实验优化,确定了灯丝电离能量70 eV、灯丝发射电流40 mA、推斥极电压27 mV、离子聚焦电压85 mV和透镜补偿电压20 V等最佳工作条件。建立了空气样品直接进样条件下氪和氙的气质联用分析方法,氪和氙的最低可检测浓度分别为3.3×10^-8(V/V)和2.6×10^-9(V/V)。同时应用本方法测量了实验室所处开放空间大气中氪和氙的体积比浓度,分别为1.1×10^-6(V/V)和9.3×10^-8(V/V),相对合成标准不确定度分别为2.38%和3.15%。

关键词:

气相色谱-质谱
/ 大气
/ 氪
/ 氙

English

Determination of Atmospheric Krypton and Xenon by Gas Chromatography-Mass Spectrometry in Direct Injection Mode

1.
¹ Institute of Nuclear and New Energy Technology, Tsinghua University, Beijing 100084, China;
2.
² CTBT Beijing National Data Centre & Beijing Radionuclide Laboratory, Beijing 100085, China;
3.
³ Beijing Key Laboratory of Radioactive Waste Treatment, Tsinghua University, Beijing 100084, China

Corresponding author: 王建龙

Received Date: 22 September 2015
Fund Project:
本文系教育部博士点基金(No.20130002130012)

长江学者和创新团队发展计划资助(IRT-13026)项目

Abstract: Volume concentration determination for atmospheric krypton and xenon is very important for krypton-85 and radioactive xenon isotopes monitoring. An injection setup integrated adjustable quantity sample injection and quantitative dilution function was designed. The effects of EI source parameters on the sensitivity of MS detector were studied. The optimized values were as following: ionization energy of 70 eV, emission current of 40 mA, cathode voltage of 27 mV, focus voltage of 85 mV and lens compensation of 20 V, respectively. A GC-MS method for the determination of krypton and xenon in atmosphere without of sample pretreatment was developed. The minimal detected concentrations for krypton and xenon were 3.3×10^-8(V/V) and 2.6×10^-9(V/V). Moreover, the krypton and xenon concentrations in the ground level air around our laboratory were measured with the results of 1.1×10^-6 (V/V) and 9.3×10^-8 (V/V). The related combined standard uncertainties for krypton and xenon results were 2.38% and 3.15%, respectively.

Key words:

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沈阳化工大学材料科学与工程学院沈阳 110142

直接进样气相色谱-质谱法分析大气中的氪和氙

通讯作者: 王建龙

English

Determination of Atmospheric Krypton and Xenon by Gas Chromatography-Mass Spectrometry in Direct Injection Mode

Corresponding author: 王建龙

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通讯作者: 陈斌, bchen63@163.com

中国化学会秘书处

直接进样气相色谱-质谱法分析大气中的氪和氙

通讯作者: 王建龙

English

Determination of Atmospheric Krypton and Xenon by Gas Chromatography-Mass Spectrometry in Direct Injection Mode

Corresponding author: 王建龙

CCS Chemistry：嵌段共聚物自组装成 “三明治”二维有机材料，实现纳米级压力传感功能

CCS Chemistry：颜徐州、鲍哲南： 你的皮肤可能是一片SPMs

CCS Chemistry：工作高效不疲劳，只须让催化剂动起来

CCS Chemistry：静电组装导向聚合- 聚电解质纳米凝胶量化制备新策略

CCS Chemistry：金黄色葡萄球菌醛基脱氢酶是如何识别特异性底物的？

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