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ISO 4284:1993

Acid-grade and ceramic-grade fluorspar — Determination of sulfide content — Iodometric method
21. 1. 1993.
95.99   Povučen   3. 3. 2010.

Опште информације

95.99     3. 3. 2010.

ISO

ISO/TC 175

Međunarodni standard

73.080  

francuski   engleski  

Kupovina

Povučen

Jezik na kome želite da primite dokument.

Apstrakt

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.

Životni ciklus

PRETHODNO

POVUČEN
ISO 4284:1978

POVUČEN
ISO 4284:1988

TRENUTNO

POVUČEN
ISO 4284:1993
95.99 Povučen
3. 3. 2010.