石墨炉原子吸收光谱法测定热封型茶叶滤纸中铅含量的不确定度评定
石墨炉原子吸收光谱法测定热封型茶叶滤纸中铅含量的不确定度评定
目的评定石墨炉原子吸收光谱法测定热封型茶叶滤纸中的铅含量的不确定度。方法采用GB 31604.34-2016测定热封型茶叶滤纸中的铅含量。计算工作曲线、标准溶液、样品重复测定、仪器、吸光值量化误差、消解回收率、样品称量过程引入的不确定度, 建立数学模型, 计算合成不确定度。结果石墨炉原子吸收光谱法测定热封型茶叶滤纸中铅的不确定度为0.10 mg/kg。结论影响检测结果的不确定度主要来源为校准曲线与消化回收率。
ObjectiveTo evaluate the uncertainty in determination of lead content in heat-sealed tea filter paper by graphite furnace atomic absorption spectrometry. MethodsThe lead content in the heat-sealed tea filter paper was measured by GB 31604.34-2016. Uncertainties introduced by the working curve, standard solution, sample repeat measurement, instrument, absorbance quantification error, digestion recovery rate and sample weighing process were calculated, and a mathematical model was established to calculate the synthetic uncertainty. ResultsThe uncertainty of determination of lead in heat-sealed tea filter paper by graphite furnace atomic absorption spectrometry was 0.10 mg/kg. ConclusionThe main sources of uncertainty affecting the test results are the calibration curve and the digestion recovery rate.
标题：石墨炉原子吸收光谱法测定热封型茶叶滤纸中铅含量的不确定度评定
英文标题：Uncertainty evaluation of determination of lead content in heat-sealed tea filter paper by graphite furnace atomic absorption spectrometry
作者：
宫国强 吉林省食品检验所
杨震 吉林省产品质量监督检验院
赵立群 吉林省食品检验所
赫文龙 吉林省食品检验所
中文关键词:石墨炉,原子吸收光谱法,铅含量,不确定度,
英文关键词:graphite furnace,atomic absorption spectrometry,lead content,uncertainty,
发表日期：2019-02-01
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