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目的:给出火焰原子吸收分光光度法测定滤膜中镍的测量不确定度。方法:不确定度的主要来源为标准物质的不确定度,标准曲线的不确定度,以及测量重复性引起的不确定度,计算出各种不确定度分量并将其合成,以计算出滤膜中镍测量结果的不确定度。结果:按数学模型计算滤膜中镍的浓度为17.21μg/张,扩展不确定度为0.55μg/张,结果表达为17.21±0.55μg/张。结论:该方法适用于火焰原子吸收法测定滤膜中镍的不确定度评定。
Objective: To give the measurement uncertainty of nickel in filter by flame atomic absorption spectrophotometry. Methods: The main sources of uncertainty are the uncertainty of the standard material, the uncertainty of the standard curve, and the uncertainty due to the measurement repeatability. The various components of the uncertainty are calculated and synthesized to calculate the filter Uncertainty in the measurement of nickel in the film. Results: According to the mathematical model, the concentration of nickel in the filter was 17.21μg / sheet, the extended uncertainty was 0.55μg / sheet, and the result was 17.21 ± 0.55μg / sheet. Conclusion: This method is suitable for the determination of the uncertainty of nickel in filter by flame atomic absorption spectrometry.