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当亚硝酸盐与水中其他形态的氮相联系时,可以做为有机污染指标,在水质监测中它常列为重点分析项目之一。亚硝酸盐的测定,应用最广的是重氮偶合比色法,这些方法虽然有较高的灵敏度和选择性,但也受到某些离子如铜(Ⅱ),铁(Ⅲ),硫和碘离子的干扰,并且试剂都是毒性大的致癌物,有害于人体健康。近来,Gabby等人用间苯二酚在酸性条件下与亚硝酸盐反应,生成亚硝基产物再与氧锆基离子形成苍黄色螯合物,用于水中亚硝酸盐的测定,但灵敏度较低。我们在研究酚类的Ehrlish偶氮反应中,发现亚硝酸盐在酸性条件下与对氨基苯乙酮起
Nitrite can be used as an indicator of organic pollution when it is linked to other forms of nitrogen in water and is often listed as one of the key analytical items in water quality monitoring. Determination of nitrite, the most widely used is the diazo coupling colorimetric method, although these methods have higher sensitivity and selectivity, but also by some ions such as copper (Ⅱ), iron (Ⅲ), sulfur and iodine Ion interference, and reagents are toxic carcinogens, harmful to human health. Recently, Gabby et al. Used resorcinol to react with nitrite under acidic conditions to form a nitroso product and then to form a pale yellow chelate with zirconyl ion, which was used for the determination of nitrite in water. However, the sensitivity low. In our study of the Ehrlish azo reaction of phenols, we found that nitrite, under acidic conditions, starts with p-aminoacetophenone