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  

Uncertainty Evaluation of Analyzing Benzene in Environmental Air by Cryo-concentration/GC-MS

作　　者：朱希希[1] 张祥志[2] 张宗祥[1] 

机构地区：[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

出　　处：《环境监控与预警》2014年第6期34-36,共3页Environmental Monitoring and Forewarning

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。Based on the repeated testing of standard gas of benzene by pre-concentration combined gas chromatography-mass spec-trometry,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 .

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 苯 空气 

分 类 号：X831[环境科学与工程—环境工程]