1 Scope
This document specifies the methods for determining the reflectance of vitrinite of
coals microscopically on 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 document.
BS ISO 7404-5:2025 Documento de referencia
ISO 7404-1 Carbón - Métodos para el análisis petrográfico - Parte 1: Vocabulario
ISO 7404-2 Carbón - Métodos para el análisis petrográfico - Parte 2: Método para la preparación de muestras de carbón
BS ISO 7404-5:2025 Historia
2025BS ISO 7404-5:2025 Carbón — Métodos para el análisis petrográfico — Método para determinar microscópicamente el brillo de la vitrina
2009BS ISO 7404-5:2009 Métodos para el análisis petrográfico de carbones - Método de determinación microscópica de la reflectancia de la vitrinita
1995BS 6127-5:1995 Análisis petrográfico de hulla bituminosa y antracita - Método de determinación microscópica de la reflectancia de la vitrinita