Abstract
The principle of the method specified is digestion of a test portion in a sealed apparatus in a mixture of hydrochloric acid, tin(II) chloride and boric acid solutions, absorption of the liberated hydrogen sulfide, entrained in a stream of oxygen-free argon or nitrogen, in zinc acetate solution and iodometric determination of the zinc sulfide formed. The method is applicable to products having a sulfide content equal to or greater than 0,001 % (m/m). It is not applicable, if presence of polysulfides is suspected.
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Status: WithdrawnPublication date: 1993-01
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Edition: 3Number of pages: 4
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Technical Committee: ISO/TC 175 Fluorspar
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- ICS :
- 73.080 Non-metalliferous minerals
Life cycle
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Previously
WithdrawnISO 4284:1978
WithdrawnISO 4284:1988
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Now
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