ISO/WD 7404-3

Methods for the petrographic analysis of coals — Part 3: Method of determining maceral group composition

General information

Current stage: 20.98 Effective date: Dec 6, 2022

Originator: ISO

Owner: ISO/TC 27/SC 5

Type: International Standard

Scope

ISO 7404-3:2009 specifies a method for determining the proportions of the maceral groups (and the minerals, if desired) in coals. ISO 7404-3:2009 is applicable only to determinations made on polished particulate blocks using incident white light. For lower-rank coals, the additional use of the fluorescence mode is necessary to identify liptinites.

Life cycle

PREVIOUSLY

Revises
ISO 7404-3:2009

NOW

ABANDON
ISO/WD 7404-3
20.98 Project deleted
Dec 6, 2022

Preview

Only informative sections of projects are publicly available. To view the full content, you will need to members of the committee. If you are a member, please log in to your account by clicking on the "Log in" button.