潮州产13种野菜中硝酸盐和亚硝酸盐的含量

根据潮州产13种野菜中硝酸盐和亚硝酸盐含量的测定结果,参考蔬菜中硝酸盐含量分级评价标准和我国的无公害蔬菜亚硝酸盐含量限量标准(≤4.0mgkg),对13种野菜的品质进行了评价。结果显示,菜、酢浆草、野茼蒿、黄鹌菜和腋花蓼硝酸盐含量低于轻度污染水平,亚硝酸盐含量低于我国制定的无公害蔬菜亚硝酸盐含量的限量标准(≤4.0mgkg),属于一级无公害野菜,可以安全食用;少花龙葵、马齿苋、鳢肠、叶下珠、铁苋菜、小藜和牛繁缕的硝酸盐含量高于432mgkg,而低于785mgkg,亚硝酸盐含量低于限量标准(≤4.0mgkg),属于二级野菜,不宜生食,煮熟和盐渍可安全食用;鼠曲草的硝酸盐含量高于785mgkg,低于1440mgkg,属于三级野菜,不可生食和盐渍,可熟食。

Contents of Nitrate and Nitrite of 13 Wild Vegetables from Chaozhou

The contents of nitrate and nitrite of 13 wild vegetables collected from Chaozhou were determined. According to the evaluation standards for nitrate and nitrite pollution at home and aboard,the quality of 13 wild vegetables were discussed as follows:Rorippa montana (Wall.) Small,Oxalis corniculata L.,Gynura crepidioides Benth.,Youngia japonica (L.) DC.and Polygonum plebelum R. Br. belong to the first class edible wild vegetables and they can be eaten anyway (in fresh,after salted or cooked ). Solanum nigrum L.var.pauciflorun Liou,Portulaca oleracea L.,Eclipta prostrata L.,Phyllanthus urinaria L.,Acalypha australis L.,Chenopodium serotinum L.and Stellaria aquatica (L.) Scop. belong to the second class wild vegetable,and can be eaten after salted or cooked. Gnaphalium affine D. Don. Belongs to the third class wild vegetables,it can be eaten after cooked.