目的建立离子选择电极法测定农村生活饮用水中氟化物的标准不确定度数学模式。方法按照《生活饮用水标准检验方法》(GB/T 5750.5-2006),应用一个实例量化不确定度的分量,并作详尽的分析和计算,得到扩展不确定度。结果标准曲线拟合对不确定度的贡献最大。该水样氟化物浓度报告为(1.06±0.032)mg/L,P=95%,K=2。结论为实验室质量控制提供依据。 Objective To establish a mathematical model of standard uncertainty for the determination of fluoride in drinking water in rural areas by ion selective electrode. Methods According to “Standard Test Method for Domestic Drinking Water” (GB / T 5750.5-2006), an example is used to quantify the components of the uncertainty and make a detailed analysis and calculation to obtain the extended uncertainty. Results Standard Curve Fitting contributes the most to uncertainty. The water fluoride concentration was reported as (1.06 ± 0.032) mg / L, P = 95% and K = 2. Conclusion provides the basis for laboratory quality control.