【摘要】 <正> 本文报导的方法是在南京大学高鸿教授研究的K₃Fe（CN）₆示波极谱滴定法（在PH8的K₂HPO₄—KH₂PO₄—KBr底液中,用0.04660mol/LK₃Fe（CN）₆标准溶液对纯抗坏血酸测定）的基础上,考虑到L—抗坏血酸（以下简称V_e）在碱性、中性介质中稳定性差,如用于V_e含量很微的果蔬测定,对结果影响大。本文改为H₂C₂O₄—KBr的酸性介质作底液,用更多还原

【Abstract】 In matrix solution of oxalic acid and brominated potassium,The potassium ferricyanide is used as titrant. The oscillographic oscillogram (curve dE/dt—E)that change suddenly (since dent and protuberance incisions disappear) is used to indicate the end point. The result of the determination for standard L—ascorbic acid and the sample of fruit and vegetable (Vc content≥l0mg/100g) is in the satisfactory agreement by the method. The mathod is simple, convenient and vary fast, its selectivity is high. It is particularly applicable to the determination of deep colour sample of fruit and vagetable.更多还原