测汞仪法测定植物油中微量汞的研究  

Determination of Trace Mercury in Vegetable Oil by Mercury Analyzer

作　　者：周玉文 陈云 马宏祥 赵生国 ZHOU Yuwen;CHEN Yun;MA Honxiang;ZHAO Shengguo(Lab Tech Ltd.,Beijing 101312,China;Gansu Entry-Exit Inspection and Quarantine Bureau,Lanzhou 730020,China)

机构地区：[1]北京莱伯泰科科技有限公司,北京101312 [2]甘肃出入境检验检疫局技术中心,甘肃兰州730020

出　　处：《食品科技》2020年第4期313-315,共3页Food Science and Technology

摘　　要：建立测汞仪法测定植物油中微量汞的新方法。将植物油样品直接称量于石英舟中,在样品分解炉中干燥,载气高纯氧气中充分燃烧释放出汞,经催化还原成原子化态汞,与金膜富集形成金汞齐,在850 ℃快速加热释放出汞,在汞特征波长253.6 nm下测定汞的含量。方法检出限为0.2 μg/kg,相对标准偏差为1.3%~3.6%(n=6),加标回收率为92.8%~96.9%。该方法快速、稳定,重现性良好,适用于植物油中微量汞的快速测定。A new method for the determination of trace mercury in vegetable oil by liquid mercury analyzer was established.The vegetable oil samples were weighed directly in a quartz boat,dried in a sample decomposing furnace,fully burned in carrier gas high-purity oxygen to release mercury,which was catalytically reduced to atomized mercury,enriched with gold film to form gold amalgam,and then heated at 850 ℃ to release mercury.The content of mercury was determined at the characteristic wavelength of 253.6 nm.The detection limit was 0.2 μg/kg,the relative standard deviation was 1.3%~3.6% (n=6),and the recovery rate was 92.8%~96.9%.The method is rapid,stable and reproducible,and is suitable for the rapid determination of trace mercury in vegetable oil.

关 键 词：测汞仪 植物油 汞 

分 类 号：TS207.51[轻工技术与工程—食品科学]