由于硝酸盐在土壤中很易流失,在许多施肥试验时常需测定其水平;农药常与肥料一并使用,也需测定其在土壤中的水平;此外,食品、水及其它环境样品中硝酸盐、亚硝酸盐及农药的含量数据可用来评价地下水及地表水的污染。目前常用的硝酸盐测定方法是将其还原成亚硝酸盐,而亚硝酸盐及某些有机化合物对测定结果有干扰,且样品需还原或衍生化,样 Because nitrate is easily lost in soils, it is often necessary to determine the level of nitrate in many fertilization trials. Pesticides are often used with fertilizers as well as in soils. In addition, nitrate levels in food, water and other environmental samples , Nitrite and pesticide content data can be used to evaluate groundwater and surface water pollution. The commonly used method of nitrate determination is to reduce it to nitrite, while nitrite and some organic compounds interfere with the determination results, and the sample needs to be reduced or derivatized