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本文介绍羟基保太松的比色测定。反应原理为利用样品中酚的结构,在盐酸和亚硝酸钠的条件下,最初的反应是在邻位发生亚硝基化(为亚硝基化衍生物),但不稳定而极易氧化。改在氢氧化钾溶液的条件下,就可能生成邻醌或亚硝基-酚,在吡唑二酮环上成为酮-醇结构,此生成物为黄色溶液,其色泽与浓度成正比。本品的测定浓度为0.25～10mg/100ml,准确度为98.80±1.33%。
This article describes the hydroxyl Paul too loose colorimetric determination. The reaction principle is to use the structure of the phenol in the sample. Under the conditions of hydrochloric acid and sodium nitrite, the initial reaction is nitrosation (as a nitrosylated derivative) in the ortho-position, but is unstable and easily oxidized. Change under the conditions of potassium hydroxide solution, it may generate o-quinone or nitroso-phenol, pyrazole dione ring ketone-alcohol structure, the product is a yellow solution, the color is proportional to the concentration. The determination of the product concentration of 0.25 ~ 10mg / 100ml, the accuracy of 98.80 ± 1.33%.