分析测试学报
分析測試學報
분석측시학보
JOURNAL OF INSTRUMENTAL ANALYSIS
2010年
1期
88-92,96
,共6页
有机物挥发总量%热解吸/气相色谱法%室内空气%不确定度
有機物揮髮總量%熱解吸/氣相色譜法%室內空氣%不確定度
유궤물휘발총량%열해흡/기상색보법%실내공기%불학정도
total volatile organic compounds(TVOC)%thermal desorption/gas chromatography%indoor air%uncertainty
对气相色谱法测定室内有机物挥发总量(TVOC)过程中可能引入的不确定度进行了分析和评定.通过实验数据计算得出室内空气中TVOC浓度的不确定度为:当取置信概率为95%,包含因子k=2,则其扩展不确定度U_(rel)=13.73%.通过对不确定度的分析,指出在检测过程中质量控制的关键在于标准物质的浓度和气相色谱分析样品过程,该两项引入的不确定分量占总相对标准不确定度的93%,并提出了质量控制改进方法.
對氣相色譜法測定室內有機物揮髮總量(TVOC)過程中可能引入的不確定度進行瞭分析和評定.通過實驗數據計算得齣室內空氣中TVOC濃度的不確定度為:噹取置信概率為95%,包含因子k=2,則其擴展不確定度U_(rel)=13.73%.通過對不確定度的分析,指齣在檢測過程中質量控製的關鍵在于標準物質的濃度和氣相色譜分析樣品過程,該兩項引入的不確定分量佔總相對標準不確定度的93%,併提齣瞭質量控製改進方法.
대기상색보법측정실내유궤물휘발총량(TVOC)과정중가능인입적불학정도진행료분석화평정.통과실험수거계산득출실내공기중TVOC농도적불학정도위:당취치신개솔위95%,포함인자k=2,칙기확전불학정도U_(rel)=13.73%.통과대불학정도적분석,지출재검측과정중질량공제적관건재우표준물질적농도화기상색보분석양품과정,해량항인입적불학정분량점총상대표준불학정도적93%,병제출료질량공제개진방법.
Uncertainties originated from the measurement of total volatile organic compounds(TVOC) content in the indoor air by gas chromatography(GC) were evaluated.The relative uncertainty(U_(rel)) of the TVOC concentration was calculated to be 13.73% from the experimental data when the designed incredible probability was 95% and factor(k) was 2.From results of uncertainty analyses,it was concluded that the key issue for quality control of the testing was reference materials and the process of GC analysis,and their uncertainty value was 93% of the relative standard one.Based on these uncertainty analyses,some methods used to improve the quality control were also discussed.
