It remains all the advantage of standard curve method and reduce the effect of the drift of electromotance on the result. The precision and accuracy with this method come up to 0.85% and-0.63% respectively.

• 该法既保留了原来所具有优点又减少电动势读数飘移现象对测量结果的影响；精密度为0.；86%25；准确度为-0