引用本文:朱希希1,张祥志2,张宗祥1.预冷冻浓缩系统与气相色谱-质谱法测定空气中苯的测量不确定度评定[J].环境监控与预警,2014,6(6):34-36
ZHU Xi xi1,ZHANG Xiang zhi2,ZHANG Zong xiang1.Uncertainty Evaluation of Analyzing Benzene in Environmental Air by Cryo concentration/GC MS[J].Environmental Monitoring and Forewarning,2014,6(6):34-36
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预冷冻浓缩系统与气相色谱-质谱法测定空气中苯的测量不确定度评定
朱希希1,张祥志2,张宗祥11,2
1.泰州市环境监测中心站,江苏 泰州 225300;2.江苏省环境监测中心,江苏 南京 210036
摘要:
根据Top-down技术中的控制图法,运用预冷冻浓缩系统与气相色谱-质谱联用对苯标准样气进行多次测定。通过计算和评定,得出当苯的测定浓度为100×10-9时,不确定度为5.1×10-9。
关键词:  不确定度评定  Top-down技术  预冷冻浓缩  气相色谱-质谱法    空气
DOI:
分类号:X831
基金项目:
Uncertainty Evaluation of Analyzing Benzene in Environmental Air by Cryo concentration/GC MS
ZHU Xi xi1,ZHANG Xiang zhi2,ZHANG Zong xiang11,2
1.Taizhou Environmental Monitoring Central station,Taizhou,Jiangsu 225300,China;2.Jiangsu Environmental Monitoring Center,Nanjing, Jiangsu 210036,China
Abstract:
Based on the repeated testing of standard gas of benzene by pre concentration combined gas chromatography mass spectrometry, the top down control chat was used for uncertainty evaluation. The results showed that the uncertainty was 5.1×10-9 when the concentration of benzene was 100×10-9.
Key words:  Uncertainty evaluation  Top down technique  Cryo concentration  GC MS  Benzene  Air