参考资料--蔬菜中亚硝酸盐含量测定.docVIP

常州工程职业技术学院 毕业设计报告（论文） （ 2009届） 系 别： 制药与生物工程技术系 课题名称： 蔬菜中的亚硝酸盐含量测定 指导教师： 班 级： 学生姓名： 摘 要 近几年来我国人口中患消化系统癌症的人数明显增多，根据学者的研究发现，造成这种现象的原因与我国人口摄入过多的硝酸盐和亚硝酸盐是分不开的。。 0.3-0.5g亚硝酸盐即可引起中毒, 3克可致死。另外亚硝酸盐能够透过胎盘进入胎儿体内,人体血液中亚硝酸钠浓度为 0.4mg/kg～200mg/kg时会产生毒性,孕妇食用过量的亚硝酸钠可导致胎儿畸形,特别是六个月以内的婴儿。联合国粮农组织和世界卫生组织规定硝酸盐和亚硝酸盐的每日允许摄入量： KNO3 或 NaNO3 0.5mg/kg，KNO2或 NaNO2 0.2mg/kg。 为了更加健康的饮食习惯，本文开始研究蔬菜中的亚硝酸盐含量。针对亚硝酸盐的测定，本文借鉴前人的经验设计出一套合理可行的分光光度法测定蔬菜中亚硝酸盐的方案，该方案的线性范围0 mg/L～0.3 mg/L，线性相关系数r=0.999 x，检出限为0.14 mg/kg%～104%的亚硝酸钠含量。Abstract In recent years Chinas population with the digestive system in the number of cancer significantly increased, according to the research of the find, cause the reasons of this phenomenon and our country population excessive intake of nitrate and nitrite is not divided. Industry, the development of agriculture and life burning led to regional and global nitrogen cycle of chaos, the penetration of nitrite also caused a groundwater pollution, threatening human health. Especially the widespread use of chemical fertilizer, the vegetables nitrate residues were too high. The human body for a small amount of nitrate intake causes indigestion, depression and headaches, when intake 0.3 0.5 g nitrite can cause poisoning, 3 g can be deadly. Another nitrite can pass through the placenta to the fetus, the human body blood sodium nitrate concentrations in central Asia for 0.4 mg/kg to 200 mg/kg can produce the toxicity, the pregnant woman eat too much and sodium nitrate can cause of fetal abnormalities, especially within six months of the baby. The United Nations food and agriculture organization (fao) and the world health organization provisions of nitrate and nitrite allowed per day intake: easier or NaNO3 0.5 mg/kg, KNO2 or NaNO2 0.2 mg/kg. In order to more healthy eating habits, this paper studies the v