Telefon: (011) 7541-421, 3409-301, 3409-335, 6547-293, 3409-310
E-mail: Prodaja standarda: prodaja@iss.rs Seminari, obuke: iss-edukacija@iss.rs Informacije o standardima: infocentar@iss.rs
Stevana Brakusa 2, 11030 Beograd
Glavni meni

ISO 1691:1976

Sodium and potassium silicates for industrial use — Determination of carbonates content — Gas-volumetric method
1. 7. 1976.

Опште информације

90.93     20. 10. 2023.

ISO

ISO/TC 47

Međunarodni standard

71.060.50  

francuski   engleski  

Kupovina

Objavljen

Jezik na kome želite da primite dokument.

Apstrakt

Three cases, defined by a preliminary test, are envisaged: silicates containing neither sulphides nor chlorates; silicates containing sulphides; silicates containing chlorates. The method based on boiling of an acidified test portion containing methyl orange and with a lead paper strip in the vapour. The presence of sulphides produces blackening of the paper and the presence of chlorates decolorizes the methyl orange. Volumetric*measurement of carbon dioxide evolved from silicates containing neither sulphides nor chlorates by reaction with a hydrochloric acid solution. The principle for the oxidation of sulphides and the reduction of chlorates are specified.

Životni ciklus

TRENUTNO

OBJAVLJEN
ISO 1691:1976
90.93 Odluka o potvrđivanju standarda
20. 10. 2023.

Nacionalna preuzimanja

Natrijum-silikat i kalijum-silikat za industrijsku upotrebu — Određivanje sadržaja karbonata — Gasno-volumetrijska metoda

90.93   Odluka o potvrđivanju standarda

Ispitivanje tehničkog natrijum-silikata i kalijum-silikata - Određivanje sadržaja karbonata (izraženog kao Na2CO3 ili K2CO3) - Gasno-volumetrijska metoda

95.99   Povučen