Manganese ores — Determination of combined water content — Gravimetric method
Manganese ores — Determination of combined water content — Gravimetric method
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ISO 549:1981 specifies a gravimetric analytical method to determine the combined water content (water of constitution) in manganese ores. The method separates water by heating a prepared test portion in a stream of dry air and collects the evolved water in absorbent traps. It is intended to be read in conjunction with ISO 4297 and used with appropriate sampling and sample preparation procedures (see ISO 4296/1 and ISO 4296/2).
This standard is aimed at laboratories and quality-control teams within mining, mineral processing and analytical services that require repeatable, comparable moisture measurements for manganese ore characterization.
Principle: Separation of combined water from the ore by heating a measured test portion in a current of dry air and gravimetric measurement of the water collected in absorbent tubes.
Apparatus highlights:
Sampling and sample preparation: Use procedures described in ISO 4296/1 and ISO 4296/2 to obtain an analytical test portion (typically ground to
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