CAJ | 학술논문

建立了EDTA容量法直接测定黄磷炉渣中氧化钙含量,该方法简便、快捷、易掌握。试样经稀盐酸溶液（0.5mol/L）浸提,采用不同的掩蔽剂消除金属离子的干扰,使滴定终点更加明锐、清晰。实验结果表明,该方法的加标回收率在98.0%～100.2%之间,标准差S为0.094,准确度、精密度较高,适用于企业的分析需要。
건립료EDTA용량법직접측정황린로사중양화개함량,해방법간편、쾌첩、역장악。시양경희염산용액（0.5mol/L）침제,채용불동적엄폐제소제금속리자적간우,사적정종점경가명예、청석。실험결과표명,해방법적가표회수솔재98.0%～100.2%지간,표준차S위0.094,준학도、정밀도교고,괄용우기업적분석수요。
This paper established EDTA volumetric method for the direct determination of the calcium oxide content of phosphorus slag, the method is simple, fast, and easy to master. The sample was extracted with dilute hydrochloric acid solution (0.5mol / L) using a masking agent to eliminate the interference of the metal ion, so that the endpoint of the titration was more pronounced sharp, clear. Experimental results shown that standard addition recoveries of the method was 98.0% to 100.2%, with the standard deviation S of 0.094, accuracy, high precision, and suitable for analysis needs of the enterprise.