Evaluation of Uncertainty in Determination of Indoor Air 22 Kinds of Total Volatile Organic Compounds by Gas Chromatography-Mass Spectrophotometry
The indoor total volatile organic compounds(TVOC)were determined by gas chromatography-mass spectrophotometry(GC-MS).The sources of uncertainty in the test process were discriminated,and the uncertainty of test results was evaluated.The measurement repeatability were evaluated by the class A uncertainty evaluation program,while the uncertainties form temperature,atmospheric pressure,volume and other parameters were evaluated by the class B.The combined relative standard uncertainty and expanded uncertainty were calculated in this research.The results showed that the mass concentration of indoor air TVOC was 0.410 9 mg·m-3,and expanded uncertainty was 0.362 6 mg·m-3(k=2).The main uncertainty component came from the fitting of standard curve.
万方数据
维普
