BS ISO 7404-4:2017
Current
The latest, up-to-date edition.
Methods for the petrographic analysis of coals Method of determining microlithotype, carbominerite and minerite composition
Hardcopy , PDF
English
18-09-2017
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Foreword
Introduction
1 Scope
2 Normative references
3 Terms and definitions
4 Principle
5 Material
6 Apparatus
7 Procedure
8 Expressions of results
9 Precision
10 Test report
Bibliography
Gives a method, using a graticule with 20 crossline intersections, for determining the proportions of microlithotypes, carbominerite and minerite in coals.
| Committee |
W/-
|
| DevelopmentNote |
Supersedes 16/30333252 DC & BS 6127-4(1990). (10/2017)
|
| DocumentType |
Standard
|
| Pages |
18
|
| PublisherName |
British Standards Institution
|
| Status |
Current
|
| Supersedes |
This document specifies a method, using a graticule with 20crossline intersections, for determining the proportions of microlithotypes, carbominerite and minerite in coals. It applies only to determinations made on polished particulate blocks using reflected white light (about 400nm to 700nm). Additional blue, blue-violet or UV light excitation (365nm to 440nm) for better identification of liptinite in fluorescence may be used especially at low rank coals.
| Standards | Relationship |
| ISO 7404-4:2017 | Identical |
| ISO 7404-2:2009 | Methods for the petrographic analysis of coals — Part 2: Methods of preparing coal samples |
| ISO 7404-1:2016 | Methods for the petrographic analysis of coals — Part 1: Vocabulary |
| ISO 7404-5:2009 | Methods for the petrographic analysis of coals — Part 5: Method of determining microscopically the reflectance of vitrinite |
| ISO 7404-3:2009 | Methods for the petrographic analysis of coals — Part 3: Method of determining maceral group composition |
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