NF ISO 1656
NF ISO 1656

NF ISO 1656

February 2015
Standard Cancelled

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

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Main informations

Collections

National standards and national normative documents

Publication date

February 2015

Release date

septembre 2019

Number of pages

26 p.

Reference

NF ISO 1656

ICS Codes

83.040.10   Latex and raw rubber

Print number

1

International kinship

ISO 1656:2014
Replaced standards (1)
NF ISO 1656
NF ISO 1656
April 2008
Standard Cancelled
Rubber, raw natural, and rubber latex, natural - Determination of nitrogen content

Standard replaced by (1)
NF ISO 1656
NF ISO 1656
October 2019
Standard Current
Rubber, raw natural, and rubber latex, natural - Determination of nitrogen content

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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