二氧化氯对三种甲醛检测方法的影响研究

Influence of Chlorine Dioxide on Three Method of Measuring Formaldehyde

主要研究二氧化氯对三种甲醛测定方法空白值的影响,结果表明:二氧化氯对AHMT法和乙酰丙酮法造成正干扰,对酚试剂法造成负干扰。二氧化氯浓度在1.0-16.0 mg/L之间,偏差为30.4%-413.0%(AHMT法),在1.0-20.0 mg/L之间,偏差为-15.0%--80.0%(酚试剂法),在0.1-3.2 mg/L之间,偏差为16.7%-233.3%(乙酰丙酮法)。对酚试剂法在0-6.0 mg/L之间的干扰程度要低于AHMT法和乙酰丙酮法;且通过实际环境空气采样,验证采样后相同含量二氧化氯溶液的偏差情况与此一致。

The influence of chlorine dioxide on three formaldehyde detection methodswas studied.The experimental results showed that chlorine dioxide caused positive interference to AHMT method and acetylacetone method,and negative interference to phenol reagent method.The concentration of chlorine dioxide was between 1.0 mg/L and 16.0 mg/L,the deviation was 30.4%to 413.0%(AHMT method),and the deviation was between 1.0 mg/L and 20.0 mg/L,and the deviation was-15.0%to-80.0%(Phenol reagent method),between 0.1 mg/L-3.2 mg/L,the deviation was 16.7%-233.3%(acetylacetone method).The interference level of the phenol reagent method between 0 mg/Land 6.0 mg/L was lower than that ofAHMT method and the acetylacetone method.And through actual ambient air sampling,it was verified that the deviation of the same content of chlorine dioxide solution after sampling was consistent with this.