分光光度法测定磷矿石中氯化物含量

摘要

通过对磷矿石中氯化物含量进行测定研究，结果表明该方法简便，准确，灵敏度高。试样溶液以丙三醇一乙醇作稳定剂，加入硝酸银形成氯化银胶状悬浊液，在40℃水浴中保温25min，采用分光光度计在波长350nm处测定氯化物含量，加标回收率在98．0％～100．3％，RSD为3．6％，该方法具有良好的线性关系。适用于磷矿石中氯化物含量的检测。%The research for chloride content in phosphate rock was measured, the results shown that the method was simple,accurate, highly sensitive. Sample solution to glycerol - ethanol as stabilizer, adding silver nitrate to form silver chloride colloidal suspension and incubated in 40℃ water bath for 25min, the chloride content was meas- ured by spectrophotometer at a wavelength of 350nm, spiked recovery rate for 98.0% - 100.3%, RSD for 3.6%, and the method has a good linear relationship. It is applicable to the detection of the chloride content of the phos- phate rock.