According to the nitrate contents in vegetables and fruits sampled in Zhengzhou and the evaluation standards for nitrate pollution, the food safety of vegetables and fruits at present was discussed, and the effect methods for minimizing the nitrate contents were pointed out at the same time. The result shows: According to national standards [3,4], in the samples examined, melon-fruit and leaf dish vegetables and fruit do not exceed standard, 8 samples of white turnip of rhizome vegetables exceed standard, the exceeding standard rate is 72. 7%; According to the vegetables nitrate hygiene evaluation criterion [5] that Shen Mingzhu put forward, melon and fruit vegetables and fruit are within the range of slight pollution, can eat raw directly; 18.2% of white turnips of rhizome vegetables are within the range of intermediate degree pollution, unsuitable to eat raw, after salt steeping or cooking is allowed, 81. 8% are within the range of highly and seriously pollution, unsuitable to eat raw and after salt steeping, can only eat after cooking; Leaf dish vegetables cabbage are within the range of highly and seriously pollution, unsuitable to eat raw and after salt steeping, can only eat after cooking.
