ISO 687:2024 PDF

Overview

ISO 687:2024 - "Coke - Determination of moisture in the general analysis test sample" specifies a standardized gravimetric method for measuring moisture in coke test samples. Applicable to blast-furnace coke, foundry coke and other high‑temperature carbonization products, the method determines moisture by heating a known mass of the general analysis sample until constant mass and calculating the moisture mass fraction from the mass loss. The 2024 fourth edition adds the optional use of nitrogen atmospheres and a minimum free space oven.

Key topics and technical requirements

• Scope: Moisture determination for general analysis test samples of coke and related products.
• Principle: Gravimetric loss-on-drying - heat a weighed sample in air or nitrogen at a controlled temperature until constant mass is achieved.
• Temperatures:
  • Typical range: 120 °C to 200 °C (optionally 105 °C for lower-temperature drying).
  • Faster procedure: 320 °C in nitrogen (1 h usually sufficient) using a minimum free space oven.
• Atmosphere:
  • Dry air or nitrogen (optional); nitrogen must have oxygen