ISO 7404-4:2017
Withdrawn
A Withdrawn Standard is one, which is removed from sale, and its unique number can no longer be used. The Standard can be withdrawn and not replaced, or it can be withdrawn and replaced by a Standard with a different number.
View Superseded by
Methods for the petrographic analysis of coals — Part 4: Method of determining microlithotype, carbominerite and minerite composition
Hardcopy , PDF
English
09-08-2017
02-11-2025
ISO 7404-4:2017 specifies a method, using a graticule with 20 crossline 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 400 nm to 700 nm). Additional blue, blue-violet or UV light excitation (365 nm to 440 nm) for better identification of liptinite in fluorescence may be used especially at low rank coals.
| Committee |
ISO/TC 27/SC 5
|
| DocumentType |
Standard
|
| Pages |
9
|
| PublisherName |
International Organization for Standardization
|
| Status |
Withdrawn
|
| SupersededBy | |
| Supersedes | |
| UnderRevision |
| Standards | Relationship |
| IS 9127 : Part 4 : 2022 | Identical |
| NEN ISO 7404-4 : 2017 | Identical |
| BS ISO 7404-4:2017 | Identical |
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