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目的评定原子荧光光度计测砷检出限测定结果的不确定度。方法根据JJF 1059.1-2012《测定不确定度评定和表示》的规定,分析各相对标准不确定度分量,计算合成标准不确定度和扩展不确定度。结果检出限测量结果不确定度报告CL=0.057 ng,U=0.025 ng(k=2)。结论为如何评定原子荧光光度计检出限测量结果的不确定度提供了参考方法。
Aim To evaluate the uncertainty of determination of arsenic detection limit by atomic fluorescence photometer. Methods According to the provisions of JJF 1059.1-2012 “Assessment and Expression of Uncertainty in Measurement”, the relative standard uncertainty components were analyzed and the composite standard uncertainty and extended uncertainty were calculated. Results Limit of detection The uncertainty of the measurement results was reported as CL = 0.057 ng, U = 0.025 ng (k = 2). The conclusion provides a reference method for assessing the uncertainty of detection limit of atomic fluorescence photometer.