中文摘要：

使用HACH测试仪与重铬酸盐法测定标准物质以及矿区水体COD并进行比对分析,实验表明,标准物质相对误差〈5%,矿区水体环境样品标准偏差在5%～20%。使用HACH测定仪对同一标准物质平行量取6份试样,其标准差为2.31 mg/l,相对偏差RSD为3.19%。结果表明,HACH测定仪测定标准物质其准确度和精密度满足监测要求,用重铬酸盐法和HACH测试仪两种方法测定矿区环境样品没有显著性差异,具有可比性,满足矿区水质监测需求。

英文摘要：

Comparing and analyzing the experimental results of the standard materials and the COD of the mining area water by HACH detector and dichromate method indicates that the relative deviation of the standard materials 〈5 % and the standard deviation of the mining area water samples are between 5 %-20 %.The standard deviation of using HACH detector test standard materials of 6 parallel samples is 2.31mg/l, and the relative deviation is 3.19 %. These data shown that the accuracy and preciseness of HACH detector can meet the requirement of testing standard materials.There is no significant difference in testing the mining area water samples between HACH detector and dichromate method. So HACH detector is fully meet the requirements of monitoring the mining area water quality.