孝感市场主要蔬菜硝酸盐污染评价及防治措施

Nitrate Pollution Assessment and Controlling Measures of Main Vegetables in Xiaogan Market

本文利用酚二磺酸比色法,对孝感市场主要蔬菜可食部分的硝酸盐含量进行检测,结果表明:不同种类的蔬菜硝酸盐含量高低按均值计算为:叶菜类>根菜类>葱蒜类>茄果类>瓜类>豆类>芋薯类>食用菌类,24种蔬菜硝酸盐含量分布在34.23-2148.67mg/kg之间,均不同程度受到污染,其中白萝卜和小白菜严重污染,不允许食用,大蒜、香葱、南瓜、茄子、四季豆、西红柿和冬瓜已达到高度污染,不宜生食,不宜盐渍。由此进一步分析了硝酸盐超标的原因,并提出了相应的污染防治措施。

The article uses phenol disulfonic acid spectriphotometric method to examine the nitrate content in the editable parts of main vegetables in Xiaogan market. The test shows ： Calculation equalizing value of nitrate content in different vegetables is ： leaf vegetables 〉 root vegetables 〉 allium vegetables 〉 solanaceous fruits 〉 ground vegetables 〉 bean vegetables 〉 taro and tuber 〉 edible fungi. The nitrate content in 24 vegetables is between 34. 23mg/kg and 2148.67mg/kg which indicates that they are all polluted in different degrees especially for white radish and pakchoi that can not be eaten. Garlic, delicious onion, pumpkin, eggplant, green bean, tomato and wax gourd are in high pollution which are not suit to eat raw or be salted. Thus the article makes further analysis on the over standard reasons of nitrate and proposed the corresponding pollution preventing and controlling measures.