本文以醋酸一硝酸试法浸提速测法为基础 ,将定性的速测法改进为简便、快速、定量测定NO-3 的新方法。硝酸试粉中的锌在酸液中产生的气生态氢 ,使硝酸盐还原成亚硝酸盐 ,亚硝酸与对氨基苯磺酸和α -萘胺作用 ,形成红色的偶氮染料 ,根据红色深浅进行定量比色测定。本法具有很高的准确度 ,测定NO-3 的线性范围是 0～5 .1 4 μg/ml,检出限为 0 .0 86 μg/ml,样品测定相对标准偏差≤ 5 % ,加标回收率为 95 %～ 1 0 5 %。 In this paper, acetic acid mononitrate test method based on the leaching, qualitative rapid test method for the simple, rapid and quantitative determination of NO-3 a new method. Nitric acid test sample zinc in the acid gas produced by the ecological hydrogen, the nitrate is reduced to nitrite, nitrite and sulfanilic acid and α - naphthylamine to form a red azo dye, according to the depth of red Quantitative colorimetric assay. The method has high accuracy. The linear range of determination of NO-3 is 0-5.1 4 μg / ml, the detection limit is 0.086 μg / ml. The relative standard deviation of the sample is ≤ 5% The recovery rate was 95% ~ 105%.