微量Cr^(6+)的示波极谱测定研究  

Determination ot Trace Cr^(6+) by Oscilloparography

作　　者：孙国军[1] 张寿松[2] 

机构地区：[1]本溪冶金高等专科学校,本溪117022 [2]东北大学,沈阳110006

出　　处：《上海环境科学》1996年第5期28-29,共2页Shanghai Environmental Sciences

摘　　要：在硫磷混酸介质中,Cr^(6+)与二苯卡巴肼反应生成的紫红色配合物,在-0.2V处产生一灵敏极谱波,其2次导数的波高与Cr^(6+)浓度在0.004～0.25mg/L范围之间呈线性关系,检出下限为0.002mg/L。此法应用于环境水样及合金标样中总铬的测定,结果与其他测定方法基本吻合。It has been found that purple complex of Cr^(6+) with diphenylcarbazide could produce sensitive polaro-graphic wave at -0.2V (vs. SCE) in H2SO4-H3PO4 medium. Linear relationship between secondary derivative wave height and concentration of Cr6+ could be obtained in the range of 0.004-0.25mg/L. The detection limit was 0.002mg/L. The method has been applied to determination of total chromium in environmental water and standard alloy sample. The results were in good agreement with those obtained by other methods.

关 键 词：铬 二苯卡巴肼 螯合效应 谱仪 吸收光谱法 

分 类 号：X132[环境科学与工程—环境科学]