上海农业学报2024，Vol.40Issue(3)：86-91,6.DOI:10.15955/j.issn1000-3924.2024.03.14
石墨炉原子吸收光谱法测量干香菇镉含量的不确定度来源评定
Evaluation of the uncertainty components of cadmium content in Lentinula edodes determined by the graphite-furnace atomic absorption spectrometry
摘要
Abstract
According to JJF 1059.1-2012,an analysis of the measurement uncertainty of cadmium content in Lentinula edodes using graphite-furnace atomic absorption spectrometry was conducted.The uncertainty primarily arises from five aspects:measurement repeatability,reference materials,sample preparation,linear fitting of the standard curves,and graphite-furnace atomic absorption spectrometer.A measurement model was established for each aspect,and the relative standard uncertainties were evaluated and calculated as 0.007 43,0.002 68,0.022 75,0.008 66,and 0.000 05 respectively.The combined standard uncertainty was 0.015 1 mg/kg,resulting in the expanded uncertainty of 0.03 mg/kg for the measurement.The results indicate that the most significant factor introducing uncertainty in this experiment is the mass concentration obtained during linear fitting of the standard curve.关键词
石墨炉原子吸收光谱法/香菇/镉含量/不确定度评定Key words
Graphite furnace atomic absorption spectrometry/Lentinula edodes/Cadmium content/Uncertainty evaluation分类
农业科技引用本文复制引用
王红梅,叶少丹..石墨炉原子吸收光谱法测量干香菇镉含量的不确定度来源评定[J].上海农业学报,2024,40(3):86-91,6.基金项目
上海农产品质量安全工程技术研究中心项目(19DZ2284100) （19DZ2284100）
