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ISO DIS 1656

2018 Edition, July 18, 2018

Complete Document

Rubber, raw natural, and rubber latex, natural - Determination of nitrogen content

Includes all amendments and changes through Draft , July 18, 2018


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SEE ALSO ISO 1656
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Description / Abstract:

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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