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.
万方数据
