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测定南京地区冬季２８种蔬菜中ＮＯ２－、ＮＯ３－含量的结果表明：腌制蔬莱中ＮＯ２－含量平均为新鲜蔬菜中的１６倍；南京地区居民冬季大量食用的大品种蔬菜中ＮＯ２－、ＮＯ３－含量远高于其它蔬菜；ＮＯ２－的ＡＤＩ超出ＷＨＯ规定。鉴此，本文提出了卫生学对策。
The results showed that NO2- and NO3- contents in 28 vegetables in winter in Nanjing showed that NO2- content in preserved vegetables was 16 times higher than that in fresh vegetables. NO2- and NO3- - content is much higher than other vegetables; NO2 - ADI exceeds WHO regulations. In view of this, this article presents hygiene measures.