控制分析中氰化钠含量分析方法的改进

How to improve the method of analyzing the content of NaCN in the control analysis

轻油裂解法以轻油和氨按比例 ,以石油焦为载体 ,电极反应生成 HCN,用 Na OH溶液吸收制 Na CN,此法制得的液体氰化钠中含有硫 ,原氰化钠分析方法中用硝酸银标准溶液测定含量 ,因 S2 -与 Ag NO3 反应生成 A g2 S沉淀 。

The splitting decomposition of light oil goes as follows:first,generate HCN through the electrode reaction adopting the oil code as a vehicle with the light oil and NH 3 in proportion ; then, absorb NaOH solution to generate NaCN, which contains S. The old method of analyzing the content of NaCN employs the standard AgNo 3 titration solution to test the content.However,the generation of Ag 2S sediment aftre the reaction of S 2- and AgNO 3 inflenences the test.