0 Stavka
Moj nalog
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 2997:1974

Phosphoric acid for industrial use — Determination of sulphate content — Method by reduction and titrimetry
1. 11. 1974.

Опште информације

90.93     20. 10. 2023.

ISO

ISO/TC 47

Međunarodni standard

71.060.30  

francuski   engleski  

Kupovina

Objavljen

Jezik na kome želite da primite dokument.

Apstrakt

Applicable to products having sulphate contents equal to or more than 0.0005 % (m/m). Analysis by reduction of the sulphate to sulphide by a mixture of hydriodic acid and hypophosphorus acid. Absorption of the hydrogen sulphide evolved in a mixture of acetone and sodium hydroxide solution. Titration with a standard volumetric solution of mercury(II) acetate in the presence of dithizone as indicator. Has also been approved by the IUPAC.

Životni ciklus

PRETHODNO

POVUČEN
ISO/R 847:1968

TRENUTNO

OBJAVLJEN
ISO 2997:1974
90.93 Odluka o potvrđivanju standarda
20. 10. 2023.