【摘要】 基于硝酸盐在207.38 nm处有强烈吸收,且干扰少,在pH=7中性条件下,建立了用紫外分光光度法测定蔬菜中的硝酸盐含量的方法。此法测定的结果表明回收率在95.1%~100.9%之间,相对标准偏差为1.55%~4.14%。操作方法简便,适用于蔬菜中的硝酸盐含量的测定。更多还原

【Abstract】 The new method to the determination of nitrate in the vegetable was established by ultraviolet spectroscope at pH=7 on the basis of strong absorption of nitrate at 207.38 nm and little interference of some ions.The recovery of the determination method varied from 95.1% to 100.9%.Detection limit was 1.55% to 4.14%. The method was suitable for the determination of the different content nitrate in the vegetable.更多还原