工业废水中COD的催化快速分光光度法分析

Catalyzing prismatic luminosity analysis of COD in industry waste water

在经典重铬酸钾-硫酸消解体系中加入助催化剂硫酸铝钾与钼酸铵,在密封条件下进行消解,消解温度为165℃,消解时间为15min,Ag2SO4-H2SO4催化剂加入量为3.5ml,在610nm处用3cm比色皿比色。结果表明,在工业废水中其他组分不影响COD的测定情况下,该方法具有良好的线性和重现性,测定结果的相对标准偏差为2.8%-6.0%,与经典方法(GB11914-89)相比无显著性的差异。该方法操作简单、方便,结果准确、可靠、适用于应急环境监测。

Clearing up is processed under airproof,temperature 165℃,time 15min,Ag2SO4-H2SO4 volume 3.5ml added,using 3cm contrast color utensil to compare hue on the point of 610nm,assisted by activator vitriol kalium and molybdenum acid ammonium added in sutra potassium dichromate-vitriol clearing up system.The result indicates that the way possess favorable linearity and recurring nature,the relative standard deviation of the setting out result is between 2.8% to 6.0%,which has no markedness difference comparing to sutra method(GB11914-89) under the rest composite no influence COD measure,in industry waste water.The means has the advantages of handling simpleness,convenience,outcome nicety and being the same with meeting emergency condition supervision.