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SRPS B.H8.327:1989

Solid mineral fuels — Determination of phorphorus content — Reduced molybdophosphate photometric method

Jan 11, 1989
Jan 11, 1989
95.99   Withdrawal of Standard   Dec 20, 2013

General information

95.99     Dec 20, 2013

ISS

B082

International Standard

75.160.10  

Serbian  

Standard preispitan i doneta odluka o povlačenju na osnovu donošenja standarda SRPS ISO 622

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Scope

For taking the phosphorus into solution the following two methods are specified: The carbonaceous material is removed by ashing in amuffle furnace under specified conditions and the phosphorus is extracted by treatment with hydrofluoric and sulphuric acids. The carbonaceous material is removed by repeated oxidation with nitric acid in the presence of sulphuric acid. The determination is carried out by adding ammonium molybdate and ascorbic acid solution and measuring the absorbance of the resulting blue solution by a siutable optical instrument.

Life cycle

NOW

WITHDRAWN
SRPS B.H8.327:1989
95.99 Withdrawal of Standard
Dec 20, 2013

REVISED BY

PUBLISHED
SRPS ISO 622:2020

WITHDRAWN
SRPS ISO 622:2013

Related project

Adopted from ISO 622:1981