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/R 1595:1970

Urea for industrial use — Determination of iron content — 2,2'- Bipyridyl photometric method
1. 7. 1970.
95.99   Povučen   27. 5. 2002.

Опште информације

95.99     27. 5. 2002.

ISO

ISO/TC 47

None of the other values

71.080.30  

francuski   engleski  

Kupovina

Povučen

Jezik na kome želite da primite dokument.

Apstrakt

Describes a method applicable to iron contents greater than or equal to 0.00005 % (m/m). The principle is based on the ignition of the material at 800 °C and fusion of the residue with anhydrous potassium hydrogen sulphate. Solution of the cooled melt in hydrochloric acid and reduction of iron(III) by means of hydroxylammonium chloride. Formation of an iron(II)-2,2'bipyridyl complex in the presence of a buffered solution (pH value between 4.5 and 6). Photometric measurement of the coloured complex at a wavelength of about 522 nm.

Životni ciklus

TRENUTNO

POVUČEN
ISO/R 1595:1970
95.99 Povučen
27. 5. 2002.

REVIDIRAN OD

NAPUŠTEN
ISO/CD 1595

Nacionalna preuzimanja

SRPS H.B8.152:1986  
ISS

Bazne hemikalije - Karbamid (urea) - Određivanje sadržaja gvožđa - Fotometrijska metoda sa 2,2'-bipiridilom

95.99   Povučen

H047 Saznaj više