BS ISO 7404-5:2009

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Methods for the petrographic analysis of coals – Method of determining microscopically the reflectance of vitrinite

Published By	Publication Date	Number of Pages
BSI	2009	26

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Description

This part of ISO 7404 specifies the methods for determining the reflectance of vitrinite of coals microscopically on the polished surfaces, immersed in oil. The methods are applicable to coals from single seams or coal blends covering the whole range of low-, medium- and high-rank coal.

Vitrinite reflectance measurements can be used to characterize the components within blends. Measures can be taken to correct for the vitrinite percentage within each of the components of the blend or to determine the proportion of components in a blend, particularly when the components have dissimilar vitrinite contents. This method necessitates the identification of vitrinite by the analyst.

Reflectance measurements on vitrinite obtained by interpreting the results from an automated system, are outside the scope of this part of ISO 7404.

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PDF Pages	PDF Title
9	Scope Normative references Definitions Principle
10	Reagents and materials
11	Apparatus
15	Preparation of coal sample Procedure Setting up the apparatus Starting procedure Adjusting the microscope for random or maximum measurements Illumination
16	Alignment Checking the reliability and calibration of the apparatus Stability of the apparatus Variation in reading on rotating a reflectance standard on t Correction for parasitic reflections and photomultiplier dar Linearity of the signal from the photomultiplier
17	Measurement of the reflectance of vitrinite General Measurement of the maximum reflectance of vitrinite in oil
18	Measurement of the random reflectance of vitrinite in oil Reporting of results
20	Precision Repeatability
21	Reproducibility Test report

Additional information

Status	Revision Underway
Pages	26
Publication Date	2009-11-30
ISBN	978 0 580 56505 2
Standard Number	BS ISO 7404-5:2009
Title	Methods for the petrographic analysis of coals – Method of determining microscopically the reflectance of vitrinite
Identical National Standard Of	ISO 7404-5:2009
Replaces	BS 6127-5:1995
Descriptors	Petrographic analysis, Microlithotypes, Maceral groups, Reflection factor, Geological analysis, Minerals, Coal, Solid fuels, Reproducibility, Fossil fuels, Test equipment, Optical measurement, Microscopic analysis
Publisher	BSI
Committee	W/-
ICS Codes	73.040 - Coals

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BS ISO 7404-5:2009

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