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介绍用电位滴定法测定沥青酸值的原理和方法，并用此法测定了国产7种沥青的酸值。与其它方法相比，该方法操作简单，减少了人为误差，准确度高．
The principle and method for determining the acid value of bitumen by potentiometric titration are introduced. The acid value of seven kinds of bitumen produced in China is also measured by this method. Compared with other methods, the method is easy to operate, reduces human error and has high accuracy.