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郭及张二氏曾指出:“虽然2,6-二氯酚靛酚滴定方法是测定纯净溶液中抗壞血酸的简便方法,但是若用以滴定食物酸性提取液中的抗壞血酸含量时,除非先把其它还原性物质完全除盡,则极不相宜”。Mapson及Chen等氏分别指出可以利用纸分析法把抗壞血酸和其它类似化合物完全分开。可是他们未能找出分析时破壞抗坏血酸的主要原因,所以未能应用之以作定量的测定。最近作者系统的研究了在分析时抗壞血酸破壞的原因,并设法防止之。(?)此设计了应用此法进行抗壞血酸总含量的测定,该法的回收率在98％以上。
Guo and Zhang have pointed out: “Although 2,6 - dichlorophenol indophenol titration method is a simple method for the determination of ascorbic acid in pure solution, but if used to titrate food acid extract ascorbic acid content, unless the other Reducing substances completely divisible, it is extremely inappropriate. ” Mapson and Chen et al., Respectively, indicate that paper analysis can be used to completely separate ascorbic acid from other similar compounds. However, they failed to find out the main reason for destroying ascorbic acid during the analysis and therefore they failed to apply it for quantitative determination. Recently the author systematically studied the causes of ascorbate damage during analysis and tried to prevent it. (?) This design was applied to determine the total content of ascorbic acid, the recovery rate of 98%.