This standard was last reviewed and confirmed in 2023.
Therefore this version remains current.
Abstract
PreviewISO 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.
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Status: PublishedPublication date: 2017-08
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Edition: 2Number of pages: 9
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- ICS :
- 73.040 Coals
Buy this standard
en
| Format | Language | |
|---|---|---|
| std 1 61 | PDF + ePub | |
| std 2 61 | Paper |
- CHF61
Life cycle
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Previously
WithdrawnISO 7404-4:1988
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Now
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Will be replaced by
Under developmentISO/AWI 7404-4
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