Fan J, Ye C, Feng S, Zhang G, Wang J
Department of Chemistry, Henan Normal University, Xinxiang, Henan, People's Republic of China.
Talanta. 1999 Nov 15;50(4):893-8. doi: 10.1016/s0039-9140(99)00183-6.
A rapid and sensitive flow-injection kinetic spectrophotometric method is proposed for the determination of ascorbic acid. The procedure is based on the inhibiting effect of ascorbic acid on the enhancing effect of oxalate on the potassium dichromate-potassium iodide/rhodamine 6G system. The detection limit and linear ranges are 0.08 and 0.10-4.00 microg/ml, respectively. The relative standard deviation of 11 replicate measurements is less than 2.0%. This method has been successfully used to determine ascorbic acid in pharmaceuticals, tomatoes and oranges.
提出了一种快速灵敏的流动注射动力学分光光度法测定抗坏血酸。该方法基于抗坏血酸对草酸盐增强重铬酸钾-碘化钾/罗丹明6G体系作用的抑制效应。检测限和线性范围分别为0.08和0.10 - 4.00μg/ml。11次重复测量的相对标准偏差小于2.0%。该方法已成功用于测定药物、番茄和橙子中的抗坏血酸。
