水质监测中高锰酸盐指数测定手工分析法和仪器法的对比研究  

Comparison of Permanganate Index Between Manual Analysis Method and Instrument Method in Water Quality Monitoring

作　　者：王丹 Wang Dan(Taiyuan Ecological Environment Monitoring Center,Taiyuan Shanxi 030002)

机构地区：[1]山西省太原生态环境监测中心,山西太原030002

出　　处：《山西化工》2023年第5期35-36,94,共3页Shanxi Chemical Industry

摘　　要：高锰酸盐指数作为地表水体受有机污染物和还原性无机物质污染程度的综合指标,是水质监测中需要测定的主要参数之一。本文对比了水质监测中高锰酸盐指数测定中手工分析法和仪器法获得的结果,发现与传统手工分析法相比,仪器法具有以下明显优势:测定的空白值更低,仪器法可达0.20 mg/L,而传统手工分析法为0.33 mg/L;最低检出质量浓度更低,仪器法为0.20 mg/L,而传统手工分析法为0.30mg/L;实际样品测定的相对标准偏差更低,仪器法可达0.87%~1.10%,而传统手工分析法为1.35%~1.94%;测定样品的准确度更高,仪器法为0.87%~1.10%,而传统手工分析法为1.35%~1.94%。Permanganate index,as a comprehensive indicator of surface water pollution by organic pollutants and reducing inorganic substances,is one of the imporatant parameters to be measured in water quality monitoring.This article compares the results obtained by manual analysis method and instrument method in the determination of permanganate index.The results show that compared with the manual analysis method,the instrument method shows obvious advantages in blank value,detection limit,precision and accuracy.The blank value measured is lower,which can reach 0.20 mg/L.The lowest detectable limit is lower.The value by instrument method is 0.20 mg/L,while it is 0.30 mg/L for the manual analysis method.The relative standard deviation of the actual sample is lower.The value by instrument method is 0.87%~1.10%,while it is 1.35%~1.94%%for the manual analysis method.The accuracy of the sample determination is higher.The manual analysis method is 1.35%~1.94%,while the instrumental method is 0.87%~1.10%.

关 键 词：水质检测 高锰酸盐指数 手工分析法 仪器法 结果对比 

分 类 号：X832[环境科学与工程—环境工程]