用2,6-二氯靛酚制成速测片快速测定果蔬及其制品中维生素C含量方法的研究

本文利用2,6—二氯靛酚,并选择合适辅料,制成定量测定Vc的速测片,每片相当于1.000毫克的Vc。试验对Vc速测片的片剂性能进行了测定:测得片重的相对误差为0.91％,片中主药即2,6—二氯靛酚含量的相对误差为0.98％,测定的准确度、精密度高,回收率为97.07～99.10％。片剂对光不敏感,由于采用铝箔包装,故不易受温度等的影响,稳定性好。常温贮存两年以上,其中2,6—二氯靛酚含量不变。使用时将其溶解可滴定样品。方法快速简便,准确可靠。

Studies on Rapid Determination of Vitamin C in Fruits, Vegetables and Their Products

A rapid determination method of vitamin C(vitamin C rapid test tablet) was developed. Two steps (standardizing of vitamin C and 2,6-Dichloro-phenol-ind-ophenol) were omitted by the use of the method. The relative errors of tablet, weight and 2,6-DICP content were 0.91% and 0.98% respectively .The accuracy precision and recovery of determination were 2.57%, 1.2-1.7% and 97.07-99.10% respectively. Effects of light, temperature and moisture on the stability of vitamin C rapid tablet were studied. The content of 2, 6-DICP was stable at room temperature for more than two years when the tablets had been packed in sealed aluminum foil.