ISO 4284:1993 PDF
Acid-grade and ceramic-grade fluorspar — Determination of sulfide content — Iodometric method
Title (English):
ISO 4284:1993
Acid-grade and ceramic-grade fluorspar — Determination of sulfide content — Iodometric method
- Document status:
- Withdrawn
- Format:
- Electronic (PDF)
- Number of pages:
- 4
- Publication date:
- January 21, 1993
- Edition:
- ISO IS 4284 edition 3 version 1
- ICS:
- 73.080
Description (English):
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.
Technical details
- Technical committee
- ISO/TC 175 - Fluorspar
- SKU
- ISO 4284:1993
