The reference method specified is based on igniting a test portion (of hard coal, brown coal, lignite, or coke) in intimate contact with Eschka mixture in an oxidizing atmosphere, removal of combustible matter and conversion of the sulfur to sulfate, extraction of sulfate with hydrochloric acid solution and gravimetric determination by precipitation with barium chloride.
Status: WithdrawnPublication date: 1992-12
Edition: 2Number of pages: 5
Technical Committee: ISO/TC 27/SC 5 Methods of analysis
ISO 334:1992Stage: 95.99
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