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目的建立饮用水中钡含量测定实验室内质量控制方法,保证分析实验处于受控状态,确保检测数据的准确可靠。方法以国家标准检测方法[1](无火焰子吸收分光光度法)为基础,应用空白值控制图,均值-减差控制图表及回收率控制图等方法[2],达到控制分析质量的目的。结果质量控制图空白值吸光度控制限珔x±3Sb为0.0186~-0.0300;控制样均值上下控制限珔x±A2R为46.5μg/L和35.6μg/L;减差值控制限为0~-9.45μg/L;回收率控制限珔x±3sp为103.2%和92.4%。结论采用本法控制实验室内分析质量,应用于生活饮用水中钡含量分析,结果满意。
Objective To establish a laboratory quality control method for the determination of barium in drinking water, to ensure that the analysis experiment is under control and to ensure the accuracy and reliability of the test data. Methods Based on the national standard detection method [1] (flameless absorption spectrophotometry), the methods of blank value control chart, mean-subtraction control chart and recovery rate control chart [2] were applied to control the quality of analysis . Results The quality control chart Blank value absorbance control limit 珔 x ± 3Sb 0.0186 ~ -0.0300; Control sample mean control up and down limit ± x ± A2R 46.5μg / L and 35.6μg / L; The limit of variation control limit 0 ~ -9.45 μg / L; the recovery control limit x ± 3sp was 103.2% and 92.4%. Conclusion This method is used to control the quality of laboratory analysis and is applied to the analysis of barium content in drinking water. The results are satisfactory.