66种植物维生素C含量的分析

用２，６──二氯酚靛酚滴定法测定了６６种植物（野生植物５０种，水果２种，蔬菜１４种）中维生素Ｃ的含量，实验结果表明：１、野生植物中Ｖｃ含量（６．２７～１１９．０６ｍｇ）明显高于水果蔬菜（１．５６～７４．３８ｍｇ），如反枝苋（Ｖｃ含量８９．０４～ｍｇ）、荠菜（Ｖｃ含量５２．９２ｍｇ）等许多可食性野菜可作为Ｖｃ的另一重要来源。２、不同科别的植物，同一科别的不同品种，同一品种的不同植株，Ｖｃ含量不同。植物的生长时期不同，Ｖｃ含量也不同。３、同一植株的不同部位Ｖｃ含量不同。如芹菜茎Ｖｃ含量为２．８０ｍｇ，芹菜叶为４６．４５ｍｇ。另外，样品新鲜程度不同，Ｖｃ含量也不同。

A Study on Vitamin C Content in 66 Kinds of Plant

Determination of vitamin C content in 66 kinds of plants is done by the method of dichlorophenolindophenol (including 50 kinds of plants,2 kinds of fruit and 14 types of vegetable).The experiment tells:(1) Vitamin C content in wild plant(6.27～119.06mg) is apparently higher than that in fruit and vegetable (1.56～74.38mg).For example,vitamin C contentin wild three-coloured retroflexus Amaranthus is 89.04mg,and that in Capsella Shepherdspurse is 52.92mg,and other edible plants,some of which could be taken as another important source of vitamin C.(2)Vitamin C content is different among different families,different strains of the same family and different bodies of the same strain.It also differs among the plants of differnt growing period.(3) Vitamin C content differs among different parts of the body.For example, that in the stem of Apium graveolens is 2.80mg,while in the leaf is 46.45mg.In addition, vitamin C content is different among the samples of different freshness.