批量化检测污水中总铬的方法改进研究  

Improvement of Batch Detection Method of Total Chromium in Wastewater

作　　者：朱剑平[1] 

机构地区：[1]启东市环境监测站,江苏启东226200

出　　处：《环境科学与管理》2015年第11期141-143,共3页Environmental Science and Management

摘　　要：经研究发现,采用高锰酸钾氧化-二苯碳酰二肼分光光度法检测污水中总铬时,采用50 ml锥形瓶加入30 ml水样,按照高锰酸钾氧化-二苯碳酰二肼分光光度法加入相应试剂,再用水浴在80℃时加热30分钟,氧化完全后冷却至室温,即可进行批量化检测。于540 nm波长处,用30 mm比色皿测定吸光度测定。本方法相对标准偏差RSD1.36%,加标回收率为95.0%~102%,校准曲线的线性相关系数为0.999 9,可满足监测分析的需要。When using potassium permanganate oxidation-diphenyl carbonyl hydrazine spectrophotometric method to detect total chromium in the effluent,30 ml water sample were poured into a 50 ml conical flask,according to potassium permanganate oxidation-diphenyl carbonyl dihydrazine points spectrophotometric method of adding the corresponding reagent,then water bath in 80 DEG C heating for 30 minutes,completely oxidized after cooling to room temperature,can batch detection. 540 nm wave strengths,using 30 mm colorimetric determination of absorbance. The relative standard deviation of this method is RSD1. 36%,the recovery rate is 95. 0% ~ 102%,the linear correlation coefficient of the calibration curve is 0. 999 9,which can meet the need of monitoring analysis.

关 键 词：污水 总铬 二苯碳酰二肼 

分 类 号：X830.2[环境科学与工程—环境工程]