固定污染源废气中五硫化二磷的测定方法研究
摘要
首次建立了氢氧化镉—聚乙烯醇磷酸铵吸收液/亚甲基蓝分光光度法,测定固定污染源废气中五硫化二磷的分析方法,讨论了水解和显色条件等因素对吸光度的影响,优化了实验条件。当吸收液用量为10 mL、采样量为15 L时,方法检出限为0.008 mg/m3。五硫化二磷浓度测定范围在0.2～2.0μg/mL时,相对标准偏差为2.7%～6.6%,实际测定结果表明该方法可有效测定废气中的五硫化二磷。
A method of cadmium hydroxide-polyvinyl alcohol ammonium phosphate adsorption solution/methylene blue spectrophotometry for the determination of phosphorus pentasulfide in fixed pollution source exhaust gas was established. The experimental conditions were optimized according to the influence of the hydrolysis and color developing conditions on the absorbance. The detection limit was 0.008 mg/m3 with the absorbing liquid of 10 mL and the sampling volume of 15 L,and the RSD was 2.7%～6.6% with the determination range of 0.2～2.0 μg/ml.The actual determination results show this method can be applied to determine the phosphorus pentasulfide in the exhaust gas.
A method of cadmium hydroxide-polyvinyl alcohol ammonium phosphate adsorption solution/methylene blue spectrophotometry for the determination of phosphorus pentasulfide in fixed pollution source exhaust gas was established. The experimental conditions were optimized according to the influence of the hydrolysis and color developing conditions on the absorbance. The detection limit was 0.008 mg/m3 with the absorbing liquid of 10 mL and the sampling volume of 15 L,and the RSD was 2.7%～6.6% with the determination range of 0.2～2.0 μg/ml.The actual determination results show this method can be applied to determine the phosphorus pentasulfide in the exhaust gas.
引文
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