原子吸收光谱法测定玻璃白酒瓶中铅迁移量的不确定度评定

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摘 要：采用原子吸收光谱法测定玻璃白酒瓶中铅迁移量，通过建立数学模型，分析测量过程中的不确定度来源，对测量不确定度进行评定。结果表明，当白酒瓶中铅迁移量为1.35 mg·L-1时，扩展不确定度为

0.12 mg·L-1（k=2），其中标准曲线拟合引入的不确定度对测量结果的影响较大。

关键词：原子吸收光谱法；玻璃白酒瓶；铅迁移量；不确定度

Evaluation of Uncertainty in Determination of Lead Migration in Glass Baijiu Bottles by Atomic Absorption Spectrometry

ZHANG Sha， WANG Yongqing， SU Yin

（Qixian Comprehensive Inspection and Testing Center （National Glassware Product Quality Supervision and Inspection Center）， Jinzhong 030900， China）

Abstract： The migration amount of lead in glass Baijiu bottles was determined by atomic absorption spectrometry. The uncertainty sources in the measurement process were analyzed by establishing a mathematical model， and the measurement uncertainty was evaluated. The results show that the expanded uncertainty is 0.12 mg·L-1

（k=2） when the migration amount of lead in the Baijiu bottle is 1.35 mg·L-1， and the uncertainty introduced by standard curve fitting has a greater impact on the measurement results.

Keywords： atomic absorption spectroscopy; glass Baijiu bottle; lead migration amount; uncertainty

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