标准摘要
[中文适用范围]： 本文件规定了使用凯氏定氮法的变体测定天然橡胶原料和天然橡胶胶乳中氮的宏观方法和半微观方法。 注：天然橡胶中氮的测定通常是为了估算蛋白质含量。 还存在少量的非蛋白质含氮成分。 然而，在由天然胶乳制备的干燥固体中，这些材料对总氮含量有很大贡献。 [外文原描述]： This document specifies a macro-method and a semi-micro method for the determination of nitrogen in raw natural rubber and in natural rubber latex using variants of the Kjeldahl process. NOTE The determination of nitrogen in natural rubber is usually carried out in order to arrive at an estimate of the protein content. Minor amounts of non-proteinous nitrogen containing constituents are also present. However, in the dry solids prepared from natural rubber latex, these materials can make a substantial contribution to the total nitrogen content.
英文名称Rubber, raw natural, and rubber latex, natural — Determination of nitrogen content