【摘要】 目的建立工作场所空气中溴的分光光度测定方法。方法工作场所空气中的溴经甲基橙溶液吸收,分光光度法测定。结果该方法的测定范围为0.2～2.8μg/ml;标准曲线回归方程为Y~^= 0.0427X-0.0092,r=0.9996;检出限为0.2μg/ml;最低检出浓度为0.27mg/m~3(以采集7.5L空气样品计);相对标准偏差为1.1%～3.7%;加标回收率为93.6%～97.2%;采样效率为93.5%～100.0%;样品室温下或冰箱内至少可放置15d。结论该方法适用于工作场所空气中溴浓度的测定。更多还原

【Abstract】 Objective To establish a spectrophotometric determination method of bromine in the air of workplace.Methods Bromine in the air of workplace was absorbed by methyl orange solution,then deter- mined by spectrophotometry.Results The range of the determination was 0.2 to 2.8μg/ml,the linear equa- tion was Y~^=0.0427X-0.0092,r=0.9996.The detection limit was 0.2μg/ml.The minimum detectable concen- tration was 0.27 mg/m~3 for 7.5 L air sample.The relative standard deviations covered the range of 1.1%～3.7%. The recovery rate was in the range of 93.6% to 97.2%.The sampling efficiency ranged from 93.5% to 100.0%. Conclusion The method is available for the determination of bromine in the air of workplace.更多还原