标准编号：ISO 1656:2019
中文名称：天然生胶和天然胶乳 氮含量的测定
英文名称：Rubber, raw natural, and rubber latex, natural — Determination of nitrogen content
发布日期：2019-07
标准范围
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.
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