分光光度法测定豆类中铝含量  

Determination of Aluminium Content in Beans by Spectrophotometry

作　　者：刘桂英[1] 张加玲[1] 史春果[1] 

机构地区：[1]山西医科大学公共卫生学院,山西太原030001

出　　处：《广东微量元素科学》2005年第9期45-48,共4页Trace Elements Science

基　　金：山西省自然科学基金资助(No.20041108)

摘　　要：用分光光度法测定了豆类中的铝含量。利用Al3+在乙酸-乙酸钠缓冲介质中,与铬天青S(CAS)及十六烷基三甲基溴化铵(CTMAB)反应形成蓝色三元络合物,在610 nm处测定其吸光度,并对CTMAB质量浓度进行了最佳选择。结果表明,该法提高了测定灵敏度。10种豆类中的铝含量中绿豆的铝含量最高,29.49μg/g;菜豆的铝含量最少,8.24μg/g;10种豆类的平均铝含量为15.33μg/g。可见豆类中的铝含量很低,建议放心多食豆类食品。A blue chelate formed by Al, chrome azurol S （CAS） and cetyl trimethylammonium bromide （CTMAB） in buffer solution of HAc - NaAc was determined at 610 nm, and the optimunm concentration of CTMAB was selected. The content of aluminium in different beans was determined. The result showed that the sensitivity of the method was improved. The content of Al are different among 10 kinds of beans. The highest is 29.49 μg/g in mung bean, the lowest is 8.24 μg/g in vegetable bean, and the average is 15.33 μg/g. It concludes the aluminium content in beans is at a low level, and more beans can be eaten safely.

关 键 词：铝 豆类 铬天青S 分光光度法 

分 类 号：S52[农业科学—作物学] O657.32[理学—分析化学]