橡胶.用酸溶解法溶解橡胶

[中文适用范围]： 本国际标准规定了用硝酸或硝酸和硫酸的混合物分解生橡胶和橡胶制品的方法。 本国际标准普遍适用，但对于存在潜在挥发性元素或元素组合（即 As、Sb、Bi 和 Zn + CI、Cu + CI 和 Pb + CI）的情况至关重要。 它在这些情况下很有用，因为涉及较低的温度，从而减少挥发损失。 如果不建议应用 ISO 247，则将使用这些方法来生产用于测定金属（例如痕量）的解决方案。 这些方法可防止挥发性金属衍生物的损失和不溶性金属硅酸盐的形成（这可能在含锌卤化橡胶或填充二氧化硅的橡胶的干灰化过程中产生）。 [外文原描述]： ISO 9028:2006 specifies methods for disintegration of raw rubber and rubber products by nitric acid or by a mixture of nitric and sulfuric acids. This International Standard is generally applicable, but is essential where potentially volatile elements or combinations of elements are present (i.e. As, Sb, Bi, and Zn + Cl, Cu + Cl and Pb + Cl). It is useful in these cases because lower temperatures are involved which result in less loss by volatilization. These methods will be used in order to produce solutions for the determination of metals, for example as traces, if the application of ISO 247, Rubber - Determination of ash , is not advisable. These methods prevent loss of volatile metal derivatives and the formation of insoluble metal silicates (which may result during dry ashing of halogenated rubbers containing zinc or of rubbers filled with silica).