标准摘要
[中文适用范围]： 该方法包括用热水提取测试部分，通过添加六氰基铁(II)钾和乙酸锌的溶液沉淀蛋白质，并过滤沉淀物。 此外，通过金属镉将硝酸盐还原为亚硝酸盐（仅用于测定硝酸盐）。 然后添加磺胺氯化物和N-(1-萘基)乙二胺并在538nm波长处测量获得的红色络合物。 [外文原描述]： The method consists in extracting a test portion with hot water, precipitating the protein by addition of solutions of potassium hexacyanoferrate(II) and zinc acetate, and filtrating the precipitate. Further, reduction of the nitrate to nitrite by metallic cadmium (only for determining the nitrate). Then addition of sulfanilamide chloride and N-(1-naphtyl)ethylenediamine and measurement of the red complex obtained at a wavelength of 538 nm.
英文名称Fruits, vegetables and derived products — Determination of nitrite and nitrate content — Molecular absorption spectrometric method