Evaluation of Uncertainty in Determination of Lead in Milk and Dairy Products by Atomic Absorption Spectrometry
1. Mengniu Dairy (Shenyang) Co., LTD., Shenyang 110122, China
2. Inner Mongolia Mengniu Dairy (Group) Co., LTD., Hohhot 011517, China
| Abstract: | In the field of food safety inspection, researchers should fully consider the impact of measurement uncertainty to ensure the accuracy of the results, Especially when it affects the determination of detection results.This study is to establish the mathematical model of uncertainty, Synthesize and expand each uncertainty component .Finally, the uncertainty evaluation method for the determination of lead in milk and dairy products by atomic absorption spectrometry was established. Take milk powder as an example, the uncertainty of graphite furnace atomic absorption spectrometry method 1 in GB 5009.12-2017 National Food Aafety Standard Determination of Lead in Foods was evaluated by referring to JJF 1059.1-2012 Evaluation and Expression of Measurement Uncertainty. When the standard result of lead content in milk was 0.095 mg/kg, the synthetic standard uncertainty of the determination result was 0.0022 mg/kg, k=2, and the extended uncertainty was 0.005 mg/kg, and the result could be expressed as (0.095±0.005) mg/kg. The uncertainty of measurement results is mainly due to the uncertainty component introduced by test repeatability and standard solution concentration. Therefore, in the actual testing work, the accuracy and reliability of the results can be ensured by increasing the number of standard working fluid, using glass instruments with higher accuracy, and increasing the number of parallel samples. |
| Keywords: | Milk; Lead; Uncertainty; Atomic Absorption Spectrometry |
| DOI: | 10.57237/j.wjfse.2022.01.003 |
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Received: 29 August 2022
Accepted: 29 September 2022
Published Online: 1 November 2022
References
| [1] | CNAS-CL01-G003: 2019测量不确定度的要求 [S]. 北京: 中国合格评定国家认可委员会, 2019. |
| [2] | 翟洪稳, 范素芳, 王娟, 曹梅荣, 马俊美, 任晓伟, 李强, 张岩 测量不确定度在食品检验中的应用及进展 [J]. 食品科学, 2021, 42 (05): 314-320. |
| [3] | KRISTIANSEN J. The guide to expression of uncertainty in measurement approach for estimating uncertainty an appraisal [J]. Clinical Chemistry, 2003, 49 (11): 1822-1829. DOI: 10.1373/ clinchem.2003.021469. |
| [4] | OHSEKI T, LEE K, ISHIKAWA H, et al. An introduction to uncertainty in measurement using the GUM (guide to the expression of uncertainty in measurement) [M]. Cambridge: Cambridge University Press, 2006: 51-52. DOI: 10.1017/CBO9780511755538. |
| [5] | JJF1059.1-2012测量不确定度评定与表示指南 [S]. 2013. |
| [6] | GB/T27418-2017测量不确定评定和表示 [S]. 2018. |
| [7] | CNAS-GL006:2019化学分析中不确定度的评估指南[S]. 2019. |
| [8] | JJF1135-2005 «化学分析测量不确定度评定» [S]. 2005. |
| [9] | GB/T27411-2012 «检测实验室中常用不确定度评定方法与表示» [S]. 2013. |
| [10] | GB/Z22553-2010 «利用重复性、再现性和正确度的估计值评估测量不确定度的指南» [S]. 2010. |
| [11] | GB/T27419-2018 «测量不确定度评定和表示补充文件1: 基于蒙特卡洛方法的分布传播» [S]. 2018. |
| [12] | RB/T151-2016 «食品微生物定量检测的测量不确定度评估指南» [S]. 2017. |
| [13] | GB/T8170数值修约规则与极限数值的表示和判定 [S]. 2009. |
| [14] | CNAS-CL01: 检测和校准实验室能力认可准则 [S]. 2019. |
| [15] | GB2762-2017食品安全国家标准食品中污染物限量 [S]. 2017. |
| [16] | GB5009.12-2017食品安全国家标准食品中铅的测定 [S]. 2017. |
| [17] | 那斯琴高娃, 常建军, 宋晓东. 原子吸收光谱法测定乳品中铅的不确定度评定 [J]. 食品安全质量检测学报, 2014, 5 (02): 551-554. DOI: 10.19812/j.cnki.jfsq11-5956/ts.2014.02.039. |
| [18] | 王冬初. 石墨炉原子吸收法测定奶粉中铅含量的不确定度评定 [J]. 中国检验检测, 2017, 25 (01): 29-31. DOI: 10.16428/j.cnki.cn10-1469/tb.2017.01.010. |
| [19] | 何霜, 李姗, 叶嘉荣. 微波消解—石墨炉原子吸收测定乳粉中铅的不确定度评定 [J]. 广东化工, 2015, 42 (20): 121-122. |
| [20] | 陈静, 薛红玮, 赵建飞, 张耀广, 朱宏. 原子荧光光度法测定牛乳中铅质量分数不确定度的评估 [J]. 中国乳品工业, 2012, 40 (06): 62-64. |
| [21] | 郝秋月, 李巧玲, 张巧玲. 原子吸收石墨炉法检测乳中重金属铅检测不确定度评定 [J]. 食品界, 2019 (02): 100-102. |
| [22] | 韩梦莎, 田佳鑫, 杜英伟, 吴建霞, 林琳, 王莉. 电感耦合等离子体质谱测定白酒中铅及其不确定度评定 [J]. 食品与发酵工业, 2021, 47 (06): 247-252. DOI: 10.13995/j.cnki.11-1802/ts.025263. |
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