ISO 4284:1993
Acid-grade and ceramic-grade fluorspar — Determination of sulfide content — Iodometric method
Reference number
ISO 4284:1993
ISO 4284:1993
Edición 3
1993-01
1993-01
© ISO 2024
Retirada
Resumen
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.
Ciclo de vida
-
Anteriormente
RetiradaISO 4284:1978
RetiradaISO 4284:1988
-
Ahora
¿Tiene alguna duda?
Consulte nuestras Ayuda y asistencia
Atención al cliente
+41 22 749 08 88
Horario de asistencia:
De lunes a viernes - 09:00-12:00, 14:00-17:00 (UTC+1)