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一、前言轻工部81年批准颁发的骨胶部颁标准(QB582-81)中含氯量的测定,此方法准确度高,终点较好看,不足之处是操作繁琐,使用药品多。我们经过多次试验相反复摸索、比较,采用摩尔法测定含氯量,得到了比较满意的结果。和部颁标准规定的硫氰酸盐法比较,误差在0.002～0.015％范围内。摩尔法可以利用化验骨胶灰分后的剩余残渣(即无机物)来测定含氯量,这样既节约了硫氰酸盐法中所需要的硝酸、高锰酸钾、硫氰酸铵和硫酸铁铵等化学药品,也简化了化验操作,缩短了化验时间,为提高产品质量起到一定的监督怍用。现将摩尔法介绍如下。二、实验部分 1.原理 (1)硫氰酸盐法含氯量的测定原理
I. Introduction The Ministry of Light Industry approved the determination of the content of chlorine in the bone glue ministerial standard (QB582-81) issued in 81 years. This method has high accuracy and good end point. The disadvantages are the cumbersome operation and the use of medicines. After repeated tests we repeatedly explore, comparison, the determination of chlorine content by the molar method, has been more satisfactory results. And the ministerial standard thiocyanate method, the error in the range of 0.002 ~ 0.015%. The molar method allows the determination of the chlorine content of residual residues (ie, inorganic substances) after the test of gelatin as a component, thus saving the nitric acid, potassium permanganate, ammonium thiocyanate and ammonium ferric sulfate required for the thiocyanate method And other chemicals, but also simplifies the test operation, shorten the test time, to improve product quality play a certain supervision and use. Now introduce the law is as follows. Second, the experimental part 1. Principle (1) thiocyanate method of determination of chlorine content