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ISO 1656:2019

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

Jul 30, 2019

General information

60.60     Jul 30, 2019

ISO

ISO/TC 45/SC 3

International Standard

83.040.10  

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Scope

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.

Life cycle

PREVIOUSLY

Revises
ISO 1656:2014

NOW

PUBLISHED
ISO 1656:2019
60.60 Standard published
Jul 30, 2019

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