摘要
利用非离子表面活性剂Triton X-114的浊点现象萃取,以二苯碳酰二肼为显色剂,采用分光光度法测定水中痕量六价铬,优化了试验条件,考察了共存离子的干扰。方法在0 mg/L^12.0 mg/L范围内线性良好,检出限为0.0015 mg/L,标准溶液测定的RSD为2.7%,水样加标回收率为98.1%~102%。
A method was established for determination trace Cr（Ⅵ） in water by spectrophotometry with di- phenylcarbohydrazide as color reveal agent and cloud point extraction of surface active agent Triton X-114. The experimental conditions were optimized and effect of interfering ion was observed to produce the following results ： good linearity in the range from 0 mg/L to 12.0 mg/L, the detection limits 0. 001 5 mg/L, the RSDs of the standard solution 2.7% , the recoveries of water samples from 98.1% to 102%.
出处
《环境监测管理与技术》
2009年第4期51-53,共3页
The Administration and Technique of Environmental Monitoring
关键词
六价铬
浊点萃取
分光光度法
水质
Cr（Ⅵ）
Cloud point
Spectrophotometry
Water quality
