【摘要】 地表水水质检测在水污染预警系统中是十分重要的环节。通过对地表水中电导率和氯化物、高锰酸盐指数相关性的数据分析,结果表明:电导率和氯化物在丰水期和枯水期均呈现出显著相关性,相关系数分别为0. 8667,0. 9192;电导率和高锰酸盐指数在丰水期有相关性,相关系数为0. 4483,在枯水期无相关性。根据显著性的一元线性回归方程公式,在该采样点,可推算出当电导率大于2000μs/cm左右的时候,咸潮就会出现,当电导率大于3000μs/cm左右,高锰酸盐指数的方法需改为碱性方法,同时在检测化学需氧量的过程中也需根据相关性公式,加入相应的硫酸汞来消除氯化物的干扰;在丰水期,当电导率大于400μs/cm左右,高锰酸盐指数会大于6 mg/L,超过地表水质量GB3838-2002的Ⅲ类水标准。可见在地表水检测中,根据数据分析讨论电导率,氯化物和高锰酸盐指数之间的相关性十分必要,这为实验室相关项目的检测、实验室在质量控制管理方面、政府相关部门进行水质预警管理均提供了重要的参考价值。更多还原

【Abstract】 The detection of surface water quality is very important in the water pollution early-warning system.Through the data analysis of the correlation between the conductivity and the chloride,the permanganate index in surface water,the results showed that there was a significant correlation between conductivity and chloride in both the high and the dry season,the correlation coefficient was 0. 8667 and 0. 9192,respectively. A significant correlation was showed between conductivity and permanganate index in the high water season,whose correlation coefficient was 0. 4483,and there was no correlation in the dry season. According to the formula of the univariate linear regression equation of significance,it showed that when the conductivity was greater than 2000 μs/cm,the salty tide can be calculated,and when the conductivity was greater than 3000 μs/cm,the permanganate index method needed to be changed to a basic method. Meanwhile,in the process of detecting the chemical oxygen demand,the corresponding mercury sulfate was added to eliminate the interference of the chloride,and during the high water season,when the conductivity was greater than 400 μs/cm,the permanganate index was greater than 6 mg/L,which exceeded the Class Ⅲ water standard of surface water quality GB3838-2002. Therefore,it was necessary to discuss the correlation between conductivity,chloride and permanganate index according to the data analysis,which provided important reference value for laboratory related projects in the aspect of quality control and management,the relevant government departments water quality early warning management.更多还原