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考察了在0．2mol·dm－3NaOH介质中，以银疏离子选择电极为指示电极，双饱和甘汞电极为参比电极，以AgNO3标准溶液直接电位滴定0.1－0．001mol·dm－3的硫脲衍生物体甲基-N’-安替比林硫脲（MAPTU）和N，N’-二安替比林硫脲（DAPTU）的可行性及测定结果；讨论了影响电极上电位平衡的主要因素以及干扰物质及消除方法．
In the medium of 0.2mol · dm-3NaOH, the silver-ion-selective electrode was used as the indicator electrode and the bi-saturated calomel electrode as the reference electrode. The titration of 0.1-0.001mol · dm-3 with AgNO3 standard solution Thiourea derivatives methyl-N’-antipyrine thiourea (MAPTU) and N, N’-diantipyryl thiourea (DAPTU) of the feasibility and determination of results; discussed the potential of the electrode balance The main factors as well as interfering substances and elimination methods.