微波消解-催化褪色光度法测定农产品中痕量铜  

Determination of Trace Copper in Agricultural Products by Catalytic Spectrophotometry after MicrowaveAssisted Sample Digestion

作　　者：孙雪花[1] 韦伟[1] 王月霞[1] 

机构地区：[1]延安大学化学与化工学院,陕西延安716000

出　　处：《分析科学学报》2009年第4期481-483,共3页Journal of Analytical Science

基　　金：陕西省教育厅专项科研计划(08JK489);延安大学校内专项基金(YDK2006-25)

摘　　要：建立了微波消解-过氧化氢氧化酸性铬兰K催化动力学褪色光度法测定农产品中痕量铜的分析方法，对实验条件进行了选择、优化。方法的线性范围为0．128～14．08μg／25mL，检出限为0．016μg／25mL，回收率为98．1％～101．6％。该方法方便、较灵敏，符合农产品中痕量元素的分析要求。A new catalytic-spectrophotometric method was applied for the determination of trace copper in agricultural products. The method was based on the oxidation of acid chrome blue K by hydrogen peroxide in H2 SO4 medium using copper as the catalyst. The sample was dissolved with HNO3 and H2 O2 in a tightly closed PTFE vessel and heated in a microwave oven under prescribed program. Working conditions of the instrument and conditions of chemical reaction were optimized. A linear range of determination was 0. 128 - 14. 08 μg/25mL, the detection limit was 0. 016 μg/25mL, and recoveries were in the range of 98.1%-101.6%. The method was convenient and sensitivity.

关 键 词：催化褪色光度法 铜 酸性铬兰K 过氧化氢 微波消解 农产品 

分 类 号：O657.32[理学—分析化学]