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SRPS H.B8.152:1986

Urea for industrial use — Determination of iron content — 2,2'- Bipyridyl photometric method

Feb 1, 1986
Feb 1, 1986
95.99   Withdrawal of Standard   Jan 28, 2013

General information

95.99     Jan 28, 2013

ISS

H047

None of the other values

71.080.30  

Serbian  

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Scope

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.

Life cycle

NOW

WITHDRAWN
SRPS H.B8.152:1986
95.99 Withdrawal of Standard
Jan 28, 2013

Related project

Adopted from ISO/R 1595:1970