工作场所空气中二氧化氯的酸性紫分光光度测定方法

Determination of chlorinedioxide in air of workplaces by spectrophotometry method

目的:研究工作场所空气中二氧化氯的检测方法。方法:用酸性紫43为显色剂,二氧化氯能破坏酸性紫43的分子结构,使其紫色溶液褪色。依据溶液褪色程度比色定量。结果:二氧化氯含量在0μg～30μg范围内呈线性关系,回归方程y=-0.0161x-0.0062,相关系数r=0.9997,检出限为0.2μg/ml。当采集的空气样品体积为7.5 L时,最低检出浓度为0.16 mg/m3。结论:该方法简便实用,结果准确可靠,适合工作场所空气中二氧化氯含量的测定。

Objective：To study the method for determination of chlorinedioxide in air of workplaces.Methods：The molecular structure of acid violet 43 which was used as chromogenic reagent,could be destroyed by chlorinedioxide.So the purple solution faded and could be colorimetric determination.Results：Linear relationship was showed as chlorinedioxide content of 0 μg～30 μg.The regression formula was y=-0.0161x-0.0062,r=0.9997.The detection limit was 0.2 μg/ml.When the volume of collected air samples were 7.5 L,the minimum detection concentration was 0.16 mg/m3.Conclusion：The method is simply active,selective,high sensitive,and accurate,and can be applied in determining of chlorinedioxide in air of workplaces.