There are many methods for the determination of nitrate ion, such as the color method, the electrode method, the ultraviolet method, but the application of these methods have some limitations, there are interference factors, and the sensitivity is not high.
Drinking water nitrate ions in concentrated sulfuric acid as catalyst and benzene occurred electrophilic substitution reaction of nitrobenzene, phase chromatography the latter available Xiangying technology XiangyingGC7990plus gas determined. The sensitivity of the method is high, the minimum detectable concentration is 0.0166mg/L, the average recovery rate is 93.6%, the precision experiment is 4.1%, this method has the advantages of high sensitivity, strong selectivity, accurate, simple, fast and so on.
测定硝酸根离子的方法很多,有比色法、电极法、紫外法等,但这些方法的应用范围有一定的局限性,存在着干扰因素,且灵敏度不高。
生活饮用水中的硝酸根离子在浓硫酸催化下与苯发生亲电取代反应生成硝基苯,后者可用翔鹰技术XiangyingGC7990plus气相色谱测定。该方法的灵敏度高,***低检出浓度为0.0166mg/L,平均回收率为93.6％,精密度实验为4.1％，该法具有灵敏度高,选择性强,准确、简便、快速等。
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Drinking water nitrate ions in concentrated sulfuric acid as catalyst and benzene occurred electrophilic substitution reaction of nitrobenzene, phase chromatography the latter available Xiangying technology XiangyingGC7990plus gas determined. The sensitivity of the method is high, the minimum detectable concentration is 0.0166mg/L, the average recovery rate is 93.6%, the precision experiment is 4.1%, this method has the advantages of high sensitivity, strong selectivity, accurate, simple, fast and so on.测定硝酸根离子的方法很多,有比色法、电极法、紫外法等,但这些方法的应用范围有一定的局限性,存在着干扰因素,且灵敏度不高。
