摘要
文章研究了针对高盐基体食品中不同浓度的铅含量进行测定的三种方法,分别采用石墨炉原子吸收法、原子荧光光谱法、电感耦合等离子体发射质谱法(ICP-MS)测定酱油中的铅含量。在石墨炉分析方法中采用抗坏血酸为基体改进剂;原子荧光光谱分析方法中通过消解样品5次以上反复赶酸,有效地控制样品的酸度;在电感耦舍等离子体发射质谱分析方法中采用内标元素校正样品的基体效应,得到了良好的检测效果。样品的加标回收率在:94.439/5~108.7%之间。
Three kinds of method for determining lead element of different concentration in high- salinity--matrix-food is discussed. The concentration of lead in sauce is investigated by using Graphite furnace atomic absorption Spectrometry (GFAAS). Atomic fluorescence spectrometry (AFS) and Inductively Coupled Plasm--Mass Spectrometry (ICP-MS), Ascorbic acid is used as matrix modifier ,acid-degree can been controlled effective by repetition heating five--recurrence in AFS. Internal standard element is used for sampler matrix correction in Inductively Coupled Plasm--Mass Spectrometry (ICP--MS). The measuring is satisfied ,recoveries of spiked samples are between 96.7%-103.3%.
出处
《中国调味品》
CAS
北大核心
2009年第11期91-93,104,共4页
China Condiment
关键词
高盐基体
食品
铅
测定
high-- salinity-- matrix
food
lead
measuring