报道了以Ｓ－ 十二烷基双硫腙－ 苦味酸为载体制备苦味酸根离子电极， 研究了电极的性能， 并以该电极为指示电极研究了硝酸胍的单点滴定分析， 导出了定量关系式。 以０ ．１００ ０ ｍｏｌ／ Ｌ 标准硝酸胍溶液滴定０ ．１００ ０ ｍｏｌ／Ｌ 苦味酸， 控制滴定至９５ ％ ，１０ 次实验的平均值为０ ．１００ ２ ｍｏｌ／Ｌ， 相对标准偏差为０ ．２４ ％ ， 滴定至９０％ ～９５ ％ 相对标准偏差小于０ ．３ ％ 。 用该法进行工业硝酸胍含量分析， 数分钟就能完成， 结果与重量法很好吻合。 Reported that the picrate ion electrode was prepared by using S-dodecyl dithizone-picric acid as carrier, and the performance of the electrode was studied. Single-point titration analysis of guanidine nitrate was conducted using the electrode as the indicator electrode, formula. With 0. 100 0 mol / L standard solution of guanidine nitrate titration 0. 100 0 mol / L picric acid, control the titration to 95%, the average of 10 experiments was 0. 100 2 mol / L, the relative standard deviation of 0. 24%, titration to 90% ~ 95% relative standard deviation less than 0. 3%. Using this method for industrial nitric acid Guanidine content analysis, a few minutes to complete, the results are in good agreement with the weight method.