微波消解-原子吸收光谱法测定瓜尔豆胶中的痕量铅  

Determination of Trace Lead in Guar Gum by Microwave Digestion-AAS

作　　者：曹文忠[1] 夏拥军[1] 

机构地区：[1]张家港出入境检验检疫局,江苏张家港215600

出　　处：《化学分析计量》2013年第3期44-46,共3页Chemical Analysis And Meterage

摘　　要：建立了微波消解-石墨炉原子吸收法测定瓜尔豆胶中铅的方法。探讨了样品的称样量及前处理条件、基体改进剂的选择以及仪器工作条件的优化。铅的线性范围为0～40.0μg/L,相关系数r=0.9996,方法的检出限为0.63μg/L,测定结果的相对标准偏差为1.32%～2.16%(n=6),加标回收率为90.3%～99.4%。该法准确、简单、灵敏度高,重现性好。A method was established for determination of lead in Guar gum by microwave digestion-AAS. The optimal conditions were examined, such as instrument, microwave digestion of sample and the matrix modifier of choose were developed. The linear range of lead was 0-40.0 μg/L with correlative coefficient of r=0.999 6, the detection limit was 0.63 μg / L, the recovery was in the range of 90.3%-99.4%, and the relative standard deviation was 1.32%-2.16%（n=6）. The method is simple, rapid, sensitive and have good repeatability.

关 键 词：微波消解 原子吸收 瓜尔豆胶 铅 

分 类 号：O657.3[理学—分析化学]