石墨炉原子吸收法测定明胶中铬含量的不确定度评定  

Evaluation on the Uncertainty of Measurement of Cr in Gelatin by GFAAS

作　　者：徐莲花[1] 金善玉[1] 郭丽娜[1] 王蕾[1] 

机构地区：[1]延边州食品药品检验所食品理化室,吉林延吉133000

出　　处：《中国卫生标准管理》2017年第13期4-6,共3页China Health Standard Management

摘　　要：目的评定石墨炉原子吸收法测定明胶中铬含量的不确定度。方法本方法测定明胶中铬的不确定度主要来源于称量样品、样品前处理、标准溶液制备、标准曲线拟合等。结果对各不确定度分量进行了计算,求得扩展不确定度为0.18 mg/kg。结论铬测量不确定度的主要来源是样品消化过程引入的不确定度。Objective To assess the uncertainty of measurement of Cr in gelatin by GFAAS. Methods The major source of the uncertainty by the measurement of Cr in gelatin were the weighing of the sample, the pretreatment of the sample, the preparation of the standard solution, the fitting of the the standard curve. Results The uncertainty components were calculated, the expanded uncertainty was 0.18 mg/kg. Conclusion The main source of uncertainty in chromium measurement is the uncertainty introduced by sample digestion.

关 键 词：测量不确定度 石墨炉原子吸收法 明胶 铬 

分 类 号：R917[医药卫生—药物分析学]