氧弹燃烧——分光光度法测定危险废物中总磷的含量

采用氧弹燃烧—分光光度法测定危险废物中总磷含量,利用耐卤素氧弹富氧、充分燃烧对废物进行预处理,以超纯水为吸收液、冲洗液,通过酸化、微沸将目标物转化为正磷酸根,并用分光光度法对吸收冲洗液中正磷酸根含量进行测定,通过计算可得到总磷的含量。结果表明:该方法定量检测限为36.0 mg/kg,在0~0.6 mg/L线性范围良好,相关系数大于0.999,精密度为11.46%。用99%磷酸三丁酯进行了方法验证,准确度在97.51%~101.20%。此方法具备较好的准确度、精密度,快速安全,适合危险废物总磷的测定,并可在焚烧设备防腐蚀控制和危险废物焚烧配料方面提供实际指导。

Research on oxygen bomb combustion spectrophotometry for determining total phosphorus content in hazardous waste.This method uses halogen resistant oxygen bomb to enrich oxygen and fully burn the waste for pre-treatment.Ultra pure water is used as the absorption and washing solution,and the target substance is converted into orthophosphate ions through acidification and micro boiling.The content of orthophosphate ions in the absorption washing solution is determined by spectrophotometry,and the total phosphorus content can be calculated.The results show that the quantitative detection limit of this method is 36.0 mg/kg,with a good linear range of 0-0.6 mg/L,a correlation coefficient greater than 0.999,and a precision of 11.46%.The method was validated using 99%tributyl phosphate,with accuracy ranging from 97.51%to 101.20%.This method has good accuracy and precision,is fast and safe,and is suitable for the determination of total phosphorus in hazardous waste.It can also provide practical guidance in anti-corrosion prevention control of incineration equipment and hazardous waste incineration ingredients.