摘要
采用总铬自动在线检测仪测定水样中的总铬含量。测定5 m L水样的最佳实验条件为：过硫酸钾质量浓度为2.0 g/L的过硫酸钾溶液加入量1.0 m L,浓度为0.01 mol/L的硫酸加入量1.0 m L,二苯碳酰二肼质量浓度为2 g/L的显色剂加入量1.0 m L。该方法的检测范围为0.01-2.50 mg/L,检出限为0.01 mg/L。方法的加标回收率为97.5%-103.8%,相对标准偏差为1.17%-1.27%。
The total chromium content in water was determined by an automatic on-line analyzer. The optimum experimental conditions for 5 m L water sample are as follows：the dosage of 2.0 g/L potassium persulfate solution 1.0 m L,the dosage of 0.01 mol/L sulphuric acid 1.0 m L and the dosage of chromogenic agent with 2 g/L of diphenyl hydrazine mass concentration 1.0 m L. The linear range is 0.01-2.50 mg/L and the detection limit is 0.01 mg/L. The standard addition recoveries of the method are 97.5%-103.8% and the relative standard deviations are 1.17%-1.27%.
出处
《化工环保》
CAS
CSCD
北大核心
2015年第2期214-217,共4页
Environmental Protection of Chemical Industry
关键词
重金属污染
铬
在线检测
分光光度法
二苯碳酰二肼
分析方法
heavy metal pollution chromium on-line determination spectrophotometry diphenylcarbazide analysis method
