British Standards Institution

Source:: ISO
Committee:: PRI/50 - Raw materials (including latex) for use in the rubber industry
Categories:: Information management | Standardization. General rules | Manufacturing | Rubber and plastic industries | Rubber and plastics. Raw materials | Latex and raw rubber | Rubber compounding ingredients

Scope

This document specifies two methods for the determination of the total sulfur in all types of carbon black for use in the rubber industry:

— Method A, using a combustion furnace;

— Method B, using an automatic analyser.

With respect to safety aspects and test precision, it is preferable to use automatic systems.

Method B is therefore the preferred method. Classical chemical analysis (Method A) is acceptable if automatic equipment is not available.

Purpose

During the 2020 Systematic Review of ISO 1138:2007, there was a comment to withdraw Method A (oxygen bomb calorimeter) due to the use of hazardous chemicals. ISO/TC 45/SC 3/WG 3 discussed the comment during the 2020 online meeting and agreed to a revision. ISO/TC 45/SC 3 adopted the resolution N19/2020 unanimously to revise ISO 1138.

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Please email further comments to: debbie.stead@bsigroup.com

Standard timeline

1. Proposal

Proposal start date:

27/04/2021

Proposal end date:

11/06/2021

2. Draft

3. Public Comments

4. Comment Resolution

5. Approval

6. Publication

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Standards Development

ISO/NP 1138 Rubber compounding ingredients -- Carbon black -- Determination of sulfur content

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