ISO 157:2025 PDF
Coal — Determination of forms of sulfur
Coal — Determination of forms of sulfur
- Статус документа:
- Действующий
- Формат:
- Электронный (PDF)
- Количество страниц:
- 18
- Дата публикации:
- 15 мая 2025 г.
- Издание:
- ISO IS 157 edition 3 version 1
- ICS:
- 73.040
This document specifies methods of determining the sulfate and pyritic sulfur mass fraction of coals, and of calculating the amount of organic sulfur present.
Abstract
Overview
ISO 157:2025 - Coal - Determination of forms of sulfur specifies standardized analytical methods for quantifying sulfate sulfur and in coal and for calculating by difference. The third edition updates procedural clauses and adds a formula for organic sulfur. The procedures rely on differential solubility under reflux and subsequent analytical finishes to deliver reproducible sulfur speciation for coal quality and research purposes.
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