原子吸收光谱法检测铅项目的应用分析
Application of Graphite Furnace Atomic Absorption Spectrometry for the Determination of Lead Items in Dairy Products under Optimal Conditions
鲍晓凤 1李春立 1赵文君 1康明月 1任秀芳 1张淑丽 1吴丰吉1
作者信息
- 1. 内蒙古蒙牛乳业科尔沁有限责任公司检测实验室,内蒙古通辽 028000
- 折叠
摘要
最新版《GB 2762-2022 食品安全国家标准 食品中污染物限量》对乳制品铅项目的限量指标加严了管控.为适配限量值标准,国家卫生健康委员会、国家市场监督管理总局重新修订发布了《GB5009.12-2023 食品安全国家标准 食品中铅的测定》方法,主要下调了液态食品的检出限及定量限.国家标准的变更对石墨炉原子吸收光谱法检测铅项目仪器条件及参数设置提出了更高要求.本研究通过对比分析石墨炉原子吸收分光光度计检测液态乳制品中铅项目时,升温程序各步骤不同温度及光斑通过石墨管不同位置对加标回收结果的影响,确定最佳升温程序条件,同时确定不同铅含量样品检测时元素灯光斑位置调节的方法及位置.
Abstract
The latest edition of GB 2762-2022 Limit of Pollutants in Food of the National Standard for Food Safety strictly controls the limit index of lead items in dairy products.In order to adapt the limit value standard,the National Health Commission and the State Administration for Market Regulation revised and issued the GB5009.12-2023 Determination of Lead in Food of the National Standard for Food Safety method,which reduced the detection limit and quantitation limit of liquid food.The change of national standard has put forward higher requirements for the instrument conditions and parameters settings for the detection of lead items by graphite furnace atomic absorption spectrometry.In this study,the influence of different temperature and light spots at different positions of graphite tubes in each step of the temperature program on the labeling recovery results were compared and analyzed during the detection of lead items in liquid dairy products by graphite furnace atomic absorption spectrophotometer,and the optimalconditions of the temperature program were determined.At the same time,the adjusting methods and positions of the element light spots in the detection of samples with different lead contents were determined.
关键词
石墨炉原子吸收光谱法/乳制品/铅/升温程序/光斑Key words
graphite furnace atomic absorption spectrometry/dairy product/lead/temperature program/light spot引用本文复制引用
出版年
2024
国家科技期刊平台
NSTL
维普
万方数据