测定食品及生物样品中微量锡的消化方法探讨  

On the Digestion of Food and Biological Samples in the Determination of Micro-Amounts of Tin

作　　者：杨凤华[1] 

机构地区：[1]浙江省湖州市疾病预防控制中心,湖州313000

出　　处：《理化检验（化学分册）》2007年第12期1040-1042,共3页Physical Testing and Chemical Analysis(Part B:Chemical Analysis)

摘　　要：采用干灰化、硝酸-高氯酸、硝酸-硫酸-高氯酸和用硝酸过氧化氢微波消解4种消化方法消化样品,氢化物发生-原子荧光光谱法测定食品及生物样品中微量锡。方法线性范围为20.0μg.L-1以内,相关系数为0.999 8,经过比较,微波消解和硝酸-硫酸-高氯酸消解方法较理想,回收率分别为98.2%~101.4%和97.4%~102.8%,相对标准偏差分别为2.39%~3.85%和3.25%~3.82%。只测定锡时,微波消解和硝酸-硫酸-高氯酸消解法均可,但如锡与其他微量元素需要同时测定,为避免引入有干扰的硫酸根,以用硝酸-过氧化氢微波消解为好。In the determination of micro-amounts of tin in foodstuff and biological samples by HG-AFS,4 different methods(including the dry-ashing,acid digestion with HNO3-HClO4 and with HNO3-H2SO4-HClO4 as well as acid digestion with HNO3+H2O2 assisted with microwave heating) of sample digestion were tested,and the last 2 methods were found to be more satisfactory.The values of recovery and RSD′s(n=6) found for the two methods were in the ranges of 98.2%-101.4%,97.4%-102.8% and 2.39%-3.85%,3.25%-3.82% respectively.Bu...

关 键 词：氢化物发生-原子荧光光谱法 锡 试样消解 食品试样 生物样品 

分 类 号：TS207[轻工技术与工程—食品科学]