二苯卡巴肼分光光度法测定水中Cr^(6+)方法的改进  

A Modified in Determination of Cr^(6+) in Water Samples with Spectrophotometry

作　　者：张翠粉 徐苏娟 刘清明 李通林 

机构地区：[1]盐城市亭湖区环境监测站,江苏盐城224005

出　　处：《污染防治技术》2007年第4期91-92,共2页Pollution Control Technology

摘　　要：采用含EDTA的二苯卡巴肼显色剂测定水样中Cr6+,并且将(1+1)硫酸和(1+1)磷酸等体积配成混合酸,显色时加入1 mL混合酸与2 mL显色剂。与原方法相比,延长了显色剂的存放时间,简化了操作步骤,且保证了实验的精密度和准确度。This paper studied a modified determination of Cr^6＋ in water smaples using diphenylcarbazide associating with EDTA as color- developing agent. Mixture of acids was prepared by compounding H2SO4 （1 ＋ 1 ） and H3PO4 （1 ＋ 1 ） with a same volume, and 1 mL mixed acid and 2 mL color - developing agent were added to color. Comparing with the original method, the developed method prolonged the depositon time of color - developing agent, simplified the process, and ensured precision and accuracy.

关 键 词：六价铬 测定 二苯卡巴肼 

分 类 号：X832[环境科学与工程—环境工程]