本文根据国家标准GB18582-2008《室内装饰装修材料内墙涂料中有害物质限量》,采用气相色谱测定内墙涂料中苯、甲苯、乙苯、二甲苯的总和,分析影响不确定度的主要来源,对相对校准因子、标准物质、样品称量、峰面积比等影响不确定度的分量因素进行分析,按照JJF1059-1999《测量不确定度评定与表示》的规定进行合成,最终得出合成不确定度和扩展相对不确定度。 According to the national standard GB18582-2008 “Limit of Harmful Substances in Interior Decoration of Interior Decoration Materials”, the total content of benzene, toluene, ethylbenzene and xylene in the interior wall paint was determined by gas chromatography. The main sources of uncertainty were analyzed. The relative factors such as calibration factor, standard substance, sample weight, peak area ratio and other factors that affect the uncertainty are analyzed and synthesized in accordance with JJF1059-1999 “Assessment and Expression of Measurement Uncertainty” Degree and expansion relative uncertainty.