工作场所空气中二苯胺的紫外分光光度测定法

目的 建立工作场所空气中二苯胺的紫外分光光度测定法.方法 用硫酸处理过的玻璃纤维滤膜采集空气中二苯胺,无水乙醇解吸后紫外分光光度法测定.结果 该方法的线性范围为0.19～60 mg/m~3(以采集15 L空气计算),回归方程y=0.13x-0.016,相关系数为0.9999,检出限0.28μg/ml(以吸光度为0.02计算),精密度为1.9%～8.4%,平均采样效率99%,平均洗脱效率为98%,穿透容量大于2.2 mg,样品在室温或冷藏条件均至少可保存10 d.结论 该方法适用于工作场所空气中二苯胺的测定.

Abstract：

Objective To establish a UV spectrophotometry method for determination of diphenylamine in air of workplaces.Methods The air samples were collected by glass fiber filter treated with sulfuric acid,desorbed with alcohol by ultrasonic for 10min,determined by UV spectrophotometry.Results The detection range of the method was 0.19-60 mg/m~3 (the air volume was15L).The regression equation:y=0.13x-0.016.The correlation coefficients was 0.999 9.The detection limit was 0.28μg/ml.The relative standard deviations was 1.9%-8.4%.Sample-collected efficiency was 99%,desorotion efficiency was 98%and the penetration capacitv was more than 2.2 mg.Sample stability was 10 days at least by being stored in a refrigerator at 4℃or by ambient storage.Conclusion This method is applicable to the determination of diphenylamine in air of workplaces.

Determination of Diphenylamine in Air of Workplaces by UV Spectrophotometry Method

Objective To establish a UV spectrophotometry method for determination of diphenylamine in air of workplaces.Methods The air samples were collected by glass fiber filter treated with sulfuric acid,desorbed with alcohol by ultrasonic for 10min,determined by UV spectrophotometry.Results The detection range of the method was 0.19-60 mg/m~3 (the air volume was15L).The regression equation:y=0.13x-0.016.The correlation coefficients was 0.999 9.The detection limit was 0.28μg/ml.The relative standard deviations was 1.9%-8.4%.Sample-collected efficiency was 99%,desorotion efficiency was 98%and the penetration capacitv was more than 2.2 mg.Sample stability was 10 days at least by being stored in a refrigerator at 4℃or by ambient storage.Conclusion This method is applicable to the determination of diphenylamine in air of workplaces.