白酒工业废水中色度对总磷测定影响的探讨

Discussion on the Chrominance Compensation Problem of Testing Total Phosphorus in Liquor Industry Wastewater

水质总磷的测定钼酸铵分光光度法GB 11893-89中介绍,如试样含有浊度或色度时,需配制空白试样,然后向试料中加入3mL浊度-色度补偿液,然后从试料中吸光度扣除空白试料的吸光度。白酒工业废水中往往含有一定色度,因此,在样品测定时需进行色度补偿校正。通过对白酒工业废水在进行与不进行色度补偿时总磷测定结果的比较分析,可知,在色度约为200度(铂钴比色法)以下的样品如不进行色度补偿对总磷测定结果的影响可以忽略不计。

Water quality determination of total phosphorus in ammonium molybdate spectrophotometric method GB 11893-89, such as a sample containing turbidity or chroma, require the blank sample and then add the 3mL, turbidity liquid chroma compensation to a sample,and then from the sample absorbance of the sample blank absorbance deduction. Liquor industry wastewater often contains a certain chromaticity, therefore, in the sample determination of the need for chroma correction. This article through to the liquor industrial wastewater in comparison and determination results of total phosphorus is not chroma compensation when the analysis shows that the chromaticity is about 200 degrees（platinum cobalt colorimetry） affect the samples such as no color compensation of the determination results of phosphorus can be neglected.