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用线性电位滴定法分析抗坏血酸 ,抗坏血酸回收率为 99.80 %～ 1 0 1 .5%,相对标准偏差为 0 .61 %;分析维生素 C片中的抗坏血酸 ,相当标示量为 98.90 %～ 1 0 0 .5%,相对标准偏差不大于 0 .4 8%,说明线性电位滴定法分析维生素 C片中的抗坏血酸含量是可行的 .
The linear potentiometric titration of ascorbic acid was used. The recovery of ascorbic acid was 99.80% ~ 100.1% with a relative standard deviation of 0.61%. Ascorbic acid in vitamin C tablets was analyzed with the equivalent labeled amount of 98.90% -100. 5%, the relative standard deviation of not more than 0.48%, indicating that linear potentiometric titration of vitamin C tablets in the ascorbic acid content is feasible.