目的对生活饮用水中苯测定进行不确定度评定。方法通过分析生活饮用水中苯测定的方法,找出引起测量不确定度的来源并对其进行量化。结果生活饮用水中苯测定的扩展不确定度为1.22μg/L。结论生活饮用水中苯测定的测量不确定度标准物质和校准曲线拟合贡献最大,其次是标准系列配制的贡献较大。 Objective To evaluate the uncertainty of benzene determination in drinking water. Methods By analyzing the determination of benzene in drinking water, the sources of measurement uncertainty were identified and quantified. Results The extended uncertainty of benzene determination in drinking water was 1.22 μg / L. Conclusion The measurement uncertainty of benzene in drinking water has the largest contribution to the calibration curve fitting, followed by the contribution of the standard series.