Norm

ISO 4284:1993 en

Acid-grade and ceramic-grade fluorspar - Determination of sulfide content - Iodometric method

  • Deze norm is ingetrokken sinds 19-05-2010

31,57

Over deze norm

Status Ingetrokken
Aantal pagina's 4
Gepubliceerd op 21-01-1993
Taal Engels
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.

Details

ICS-code 73.080
Nederlandse titel Acid-grade and ceramic-grade fluorspar - Determination of sulfide content - Iodometric method
Engelse titel Acid-grade and ceramic-grade fluorspar - Determination of sulfide content - Iodometric method

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