GB/T 18866-2002 in English

《GB/T 18866-2002橡胶 酸消化溶解法》由TC35（全国橡胶与橡胶制品标准化技术委员会）归口，TC35SC2（全国橡胶与橡胶制品标准化技术委员会通用试验方法分会）执行，主管部门为中国石油和化学工业联合会。
本标准规定了用硝酸或硫酸的混合酸消化胶乳、生胶、混炼胶、硫化橡胶的方法。本标准适用于橡胶和橡胶制品的消化溶解。

Scope

This standard specifies the method of digesting latex, raw rubber, rubber mix and vulcanized rubber with nitric acid or a mixed acid of nitric acid and sulfuric acid. This standard applies to the digestion and dissolution of rubber and rubber products. Due to the low temperature in this standard operation, the volatilization loss of some potential volatile elements or combinations of volatile elements (such as As, Sb, Bi and Zn+Cl, Cu+Cl and Pb+Cl) can be reduced. When these potential volatile elements exist in the sample This standard can be used when the combination of elements or volatile elements. If GB/T 4498 "Determination of Rubber Ash Content" is not applicable, it is recommended to use this method to prepare the solution of the metal ion to be tested (for example, for microanalysis). This method prevents the loss of volatile metal derivatives or the formation of insoluble metal silicates (which may occur during dry ashing of zinc-containing halogenated rubber or samples containing silica).