一、前言我们知道如果飲食中存在亚硝胺、能使肝、肺、膀胱、食管、胃、小肠,脑和神经系统发生癌症,尤其在癌症高发区,发现的情况最多,对劳动人民的健康及生命威胁极大,急待破除以防患于未然。据Goldblatt等于1977年及Jemmali于 I. INTRODUCTION We know that if nitrosamines are present in the diet, it can cause cancer in the liver, lungs, bladder, esophagus, stomach, small intestine, brain and nervous system, especially in areas with high incidence of cancer and the health of working people And the great threat of life, urgent need to get rid of in case. According to Goldblatt in 1977 and Jemmali in