乳牛饮用水多为地面水,水源污染可导致某些有害物质在乳牛体内积蓄,如亚硝酸盐等物质能形成强致癌物〔1〕,我国为此专门制定了食品(包含乳及其制品)中亚硝酸盐的限量标准。食品中亚硝酸盐的国家标准方法采用比色法和示波极谱法,这类方法操作复杂、费时,并用有毒试剂,本文采用离 Dairy drinking water is mostly surface water, water pollution can lead to the accumulation of certain harmful substances in the body of dairy cattle, such as nitrite and other substances can form strong carcinogens 〔1〕, China has formulated a special food (including milk and its products) Central Asian nitrite limits. National standard method of nitrite in food using colorimetric and oscillopolarographic methods, such methods operate complex, time-consuming, and toxic reagents used in this paper