ISO 7404-5:2009 PDF

Methods for the petrographic analysis of coals — Part 5: Method of determining microscopically the reflectance of vitrinite

Название (английский):

ISO 7404-5:2009

Methods for the petrographic analysis of coals — Part 5: Method of determining microscopically the reflectance of vitrinite

Статус документа:: Отменён
Формат:: Электронный (PDF)
Количество страниц:: 14
Дата публикации:: 24 сентября 2009 г.
Издание:: ISO IS 7404 edition 3 version 1
ICS:: 73.040

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Описание (английский):

ISO 7404-5:2009 specifies the methods for determining the reflectance of vitrinite of coals microcopically 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 ISO 7404-5:2009.

Технические детали

Технический комитет: ISO/TC 27/SC 5 - Methods of analysis
SKU: ISO 7404-5:2009

Abstract

Overview

ISO 7404-5:2009 - Methods for the petrographic analysis of coals - Part 5 specifies the microscopic method for determining vitrinite reflectance. Measurements are made on well‑polished coal surfaces immersed in oil, using a reflected‑light microscope with a photometer at 546 nm. The procedure applies across the full range of low-, medium- and high‑rank coals and to both single‑seam coals and coal blends. Note: reflectance results derived solely from automated interpretation systems are outside the scope of this standard.

Key topics and requirements

Measurement principle: compare light intensity reflected from vitrinite with calibrated reflectance standards under oil immersion at near‑normal incidence (546 nm) using a photomultiplier or equivalent detector.
Sample preparation: polished surfaces prepared according to ISO 7404‑2 (sample preparation) are required; vitrinite must be identified microscopically by the analyst.
Immersion oil: non‑drying, non‑corrosive oil with refractive index 1.5180 ± 0.0004 at 23 °C and 546 nm; avoid aged or toxic oils.
Calibration standards: use at least two well‑spaced, individually calibrated reflectance standards (e.g., optical glasses, YAG, GGG); include a zero (non‑reflecting) standard. Standards should be calibrated against ICCP master standards where possible.
Apparatus: reflected‑light microscope with stable light source, polarizer (for maximum reflectance), measuring aperture (

Overview

Key topics and requirements

Measurement principle: compare light intensity reflected from vitrinite with calibrated reflectance standards under oil immersion at near‑normal incidence (546 nm) using a photomultiplier or equivalent detector.
Sample preparation: polished surfaces prepared according to ISO 7404‑2 (sample preparation) are required; vitrinite must be identified microscopically by the analyst.
Immersion oil: non‑drying, non‑corrosive oil with refractive index 1.5180 ± 0.0004 at 23 °C and 546 nm; avoid aged or toxic oils.
Calibration standards: use at least two well‑spaced, individually calibrated reflectance standards (e.g., optical glasses, YAG, GGG); include a zero (non‑reflecting) standard. Standards should be calibrated against ICCP master standards where possible.
Apparatus: reflected‑light microscope with stable light source, polarizer (for maximum reflectance), measuring aperture (

ISO 7404-5:2009 PDF

Технические детали

Abstract

Overview

Key topics and requirements

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Abstract

Overview

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