作　　者： ; ;

机构地区： 韩山师范学院化学系

出　　处： 《韩山师范学院学报》 2005年第6期65-68,共4页

摘　　要： 利用分光光度法测定了潮州产10种野菜中硝酸盐、亚硝酸盐的含量,利用氧化还 原滴定法测定了维生素C的含量．结果表明:月光花、决明、铁苋菜和叶下珠的硝酸盐含量 低于轻度污染水平(432 mg／kg鲜重),亚硝酸盐含量低于无公害蔬菜亚硝酸盐含量的限量标 准(≤4．0mg／kg鲜重),它们属于一级野菜,可以安全食用;鸡矢藤、白勒和苎麻的硝酸盐 含量低于785mg／kg,属于中度污染水平,亚硝酸盐含量低于无公害蔬菜亚硝酸盐含量的限 量标准,属二级蔬菜范围,不宜生食,煮熟或盐渍可安全食用;鳢肠硝酸盐含量高于785 mg／kg而低于1440mg／kg,亚硝酸盐含量低于无公害蔬菜亚硝酸盐含量的限量标准,维生 素C的含量高于50mg／100g鲜重,属于三级蔬菜,不可生食和盐溃,可熟食。牡荆和肖梵天 花虽然硝酸盐含量很低,但维生素C含量较低,亚硝酸盐含量高于无公害蔬菜亚硝酸盐含量 的限量标准,所以不宜食用． The contents of nitrate and nitrite of 10 edible wild plants collected from Chaozhou were determined by spectrophotometry, and the contents of vitamin C of which were determined by oxidimetry. The results indicate that Calonyction aculeatum（L.） House, Acalypha australis L., Cassia tora L. and Phyllanthus urinaria L. belong to the first class edible wild vegetables and they can be eaten anyway（in fresh, after salted or cooked ） because of low content of nitrate（≤432 mg/kg） and nitrite （≤4.0mg/kg）. Boehmeria spicata （L.） Gaud.,Paederia scandens（Lour.）Merr, and Acanthopanax trifoliatus（L.）Merr, belongs to the second class because of high or middle contents of Vitamin C, low content of nitrate （≤785 mg/kg） and nitrite, and can be eaten after being cooked or salted. Eclipta prostrata L. belongs to the third class edible wild vegetables because of higher contents of Vitamin C and higher content of nitrate （≥785 mg/kg, 41440 mg/kg） and it must be eaten after being cooked. Although their contents of nitrate are very low, Vitex negundo L.var cannabiflia（Sieb.et Zucc.）Hand.-Mazz and Urena lobata L. were inedible because of their high contents of nitriteand their poor contents of vitamin C.

关 键 词： 潮州市 野生蔬菜 硝酸盐 亚硝酸盐 维生素

领　　域： [生物学]