Top-down技术精密度法评定饮用水中氯酸钾含量的不确定度

目的使用Top-down技术精密度法评定饮用水中氯酸盐含量的不确定度。方法按照GB/T5750.10-2006《生活饮用水标准检验方法消毒副产物指标》规定的分析方法,通过对质控样品和能力验证样品的测定,基于Top-down精密度法的原理对数据进行检验和分析。结果通过偏移和精密度核查,在证明分析系统受控的情况下,计算得到不确定的结果U=0.056 mg/L。结论 Top-down技术用于化学分析不确定评估将不确定评估与实验室内部质量控制工作结合,减少了工作量,具有广泛的应用前景。

Uncertainty evaluation for determination of potassium chlorate in drinking water by Top-down degree of precision method

Objective To evaluate the uncertainty of the determination of chlorate content in drinking water by the Top-down degree of precision method. Methods According to GB/T 5750.10-2006 Standard examination methods for drinking water- Disinfection by-products parameters, through the determination of control sample and proficiency testing sample. the data was tested and analyzed based on the principle of Top-down degree of precision method. Results By checking the bias and the degree of precision, it could be seen that the measurement system were in the state of statistical control. The result of uncertainty was 0.056 mg/L. Conclusion Top-down control degree of precision method is used in the uncertainty evaluation of chemical analysis, which combines the uncertainty evaluation with the laboratory internal quality control work, reduces the workload, and has a wide range of application prospects.