BS ISO 1656:2019

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

BS ISO 1656:2019 发布历史

What is ISO 1656  – Rubber, raw natural, and rubber latex, natural about ?    ISO 1656 specifies a macro-method and a semi-micro method for the determination of nitrogen in raw natural rubber and natural rubber latex using variants of the Kjeldahl process.   The purpose of ISO 1656 is to develop a method of determination of the nitrogen in natural rubber by Kjeldahl process using non-toxic catalyst (no selenium in catalyst mixture). This method is easy to operate, safe and environment-friendly. It also does not need alternative analyser.   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.  Who is ISO 1656  – Rubber, raw natural, and rubber latex, natural for ?  

BS ISO 1656:2019由英国标准学会 GB-BSI 发布于 2019-08-31，并于 2019-08-31 实施。

BS ISO 1656:2019在国际标准分类中归属于: 83.040.10 胶乳和生橡胶。

BS ISO 1656:2019的历代版本如下：

• 2019年 BS ISO 1656:2019
• 2014年 BS ISO 1656:2014 橡胶, 天然生胶以及乳胶和天然乳胶. 氮含量的测定
• 1996年 BS 7164-21:1996 生橡胶和硫化橡胶的化学试验.氮含量的测定
• 0000年 BS 7164 Sec.6.1:1994
• 1990年 BS 7164 Pt.21:1990 生橡胶和硫化橡胶的化学试验.第21部分:氮含量的测定方法
• 1981年 BS 5923 Pt.3:1981 橡胶的化学分析方法.第3部分:生橡胶的挥发性物质含量的测定
• 0000年 BS 1673 Pt.7:1969
• 0000年 BS 1673 Pt.2:1967
• 0000年 BS 903 Pts.B11 and B12:1960

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标准号

BS ISO 1656:2019

发布

2019年

发布单位

英国标准学会

当前最新

BS ISO 1656:2019

 

 

适用范围

What is ISO 1656  – Rubber, raw natural, and rubber latex, natural about ?    ISO 1656 specifies a macro-method and a semi-micro method for the determination of nitrogen in raw natural rubber and natural rubber latex using variants of the Kjeldahl process.   The purpose of ISO 1656 is to develop a method of determination of the nitrogen in natural rubber by Kjeldahl process using non-toxic catalyst (no selenium in catalyst mixture). This method is easy to operate, safe and environment-friendly. It also does not need alternative analyser.   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.  Who is ISO 1656  – Rubber, raw natural, and rubber latex, natural for ?  

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