【摘 要】
：
建立内标校正气相色谱–质谱法测定空气PM2.5中邻苯二甲酸二(2-乙基己基)酯(DEHP)的不确定度评定方法,分析影响测量结果不确定度的因素,为提高检测结果质量提供依据.依据JJF 1059.1—2012《测量不确定度评定与表示》,建立数学模型,分析不确定度来源,评定各不确定度分量,计算合成标准不确定度和扩展不确定度.空气PM2.5中DEHP的质量浓度为(0.306±0.020)μg/m3,k=2.测定结果的不确定度主要来源于采样体积、提取液测定和测量重复性,其中提取液测定引入的不确定度分量最大,采样体积
【机 构】
：
武汉市疾病预防控制中心,武汉 430022;武汉市东湖医院,武汉 430074;江汉大学医学院,武汉 430056
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建立内标校正气相色谱–质谱法测定空气PM2.5中邻苯二甲酸二(2-乙基己基)酯(DEHP)的不确定度评定方法,分析影响测量结果不确定度的因素,为提高检测结果质量提供依据.依据JJF 1059.1—2012《测量不确定度评定与表示》,建立数学模型,分析不确定度来源,评定各不确定度分量,计算合成标准不确定度和扩展不确定度.空气PM2.5中DEHP的质量浓度为(0.306±0.020)μg/m3,k=2.测定结果的不确定度主要来源于采样体积、提取液测定和测量重复性,其中提取液测定引入的不确定度分量最大,采样体积和测量重复性引入的不确定度分量次之.
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