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 7990:1985

Manganese ores and concentrates — Determination of total iron content — Titrimetric method after reduction and sulfosalicylic acid spectrophotometric method
12. 12. 1985.

Опште информације

90.93     25. 3. 2022.

ISO

ISO/TC 132

Međunarodni standard

73.060.20  

francuski   engleski  

Kupovina

Objavljen

Jezik na kome želite da primite dokument.

Apstrakt

Method A is applicable to products having a total iron content from 1 to 25 % (m/m), and method B is applicable to products having a total iron content from 0.2 to 2 % (m/m). ISO 7990 should be read in conjunction with ISO 4297. Specifies principle, reactions (method A only), reagents, apparatus, sampling and samples, procedure and expression of results.

Životni ciklus

PRETHODNO

POVUČEN
ISO/R 313:1963

TRENUTNO

OBJAVLJEN
ISO 7990:1985
90.93 Odluka o potvrđivanju standarda
25. 3. 2022.

REVIDIRAN OD

NAPUŠTEN
ISO/WD 7990