摘要
纳氏试剂分光光度法测定水中氨氮,需要对水样进行预处理。标准HJ535-2009规定的方法,在实际分析过程中不足以消除钙、镁等金属离子影响,还会使溶液产生混浊,影响比色,需另外进行前处理。
Nessler's reagent spectrophotometry is used to measure the ammonia nitrogen in the water,and the water sample needs to be pre-treated.The method specified in the standard HJ535-2009 is not sufficient to eliminate the effect of the calcium-magnesium metal ions in the actual analysis,and will also cause the solution to be turbid,affecting the color,and further pre-treatment is required.
引文
[1]国家环境保护总局《水和废水监测分析方法》编委会.水和废水监测分析方法[M].4版.北京:中国环境科学出版社,2002:276-281.
[2]环境保护部.水质氨氮的测定纳氏试剂分光光度法:HJ535-2009[S].北京:中国环境科学出版社,2010.
[3]王屹.污水氨氮测定中蒸馏法预处理研究[J].辽宁师范大学学报(自然科学版),2007(12):488-490.