仪器法在高锰酸盐指数测量中的应用  

Application of instrumental method in permanganate index measurement.

作　　者：王永强 蓝建为 Wang Yongqiang;Lan Jianwei(Zhaoqing Environmental Protection Monitoring Station,Zhaoqing 526040,China)

机构地区：[1]广东省肇庆生态环境监测站,肇庆526040

出　　处：《分析仪器》2021年第4期78-81,共4页Analytical Instrumentation

摘　　要：高锰酸盐指数是我国环境水样检测中的常规指标,传统手工方法操作繁琐、耗材长、人为影响因素大。本文探讨了全自动高锰酸盐指数分析仪在测量环境水样中的高锰酸盐指数的性能指标,通过实验得出:仪器法的检出限为0.1mg/L,测量下限为0.4mg/L,测定低、中、高3个浓度的有证标准物质,相对误差为1.4-3.1%,准确度满足要求。重复测定相对标准偏差范围在0.9-3.0%之间,精密度良好。经过t检验和F检验,仪器法和手工法分析结果具有相同的精密度,两种方法的测定结果之间无显著性差异。The performance of full-automatic COD Mn analyzer in determining COD Mn in environmental water were discussed.The results showed that the LOD of the instrumental method was 0.1 mg/L while the LOQ was 0.4 mg/L.The relative errors of three kinds of certificated reference materials(CRMs)with 3 different COD Mn concentrations were within 1.4%—3.1%.The precision was satisfied,the RSD values of repeated determination were in the range of 0.9%—3.0%.The results of t-test and F-test show that manual method and the instrumental method have same precision,and there is no remarkable distinction between the two methods.

关 键 词：高锰酸盐指数 全自动高锰酸盐指数分析仪 性能指标 

分 类 号：X832[环境科学与工程—环境工程]