【摘要】 氯离子是监测地表水COD最大的干扰因素,现有的几种方法对高氯地表水的测定存在一定的局限性。文章采用将TOC测定结果折算成COD的方法,对TOC分析仪测定COD的校准曲线、检出限、精密度、准确度、加标回收等进行了探究,结果表明,TOC分析仪测定高氯地表水COD可以排除氯离子对监测结果的干扰,具有精密度和准确度高、检出限低等优点。更多还原

【Abstract】 Chloride ion is the biggest interference factor in monitoring COD of surface water, and some existing methods have certain limitations for the COD determination of surface water containing high concentration chloride ion. In this paper, the calibration curve of COD, detection limit, precision, accuracy, and adding standard recovery were researched by using the method of converting TOC data into COD data. The results show that TOC characterization method instead of COD can eliminate the interference of chloride ions on COD determination of surface water, and it has the advantages of high precision, qualified accuracy, and lower detection limit. The method is a useful guideline for the COD determination of surface water containing high concentration chloride ion.更多还原