Methods for chemical analysis of lead concentrates--The atomic absorption spectrophotometric methodfor the determination of magnesium oxide content

WITHDRAWN published on 10.8.1987

Methods for chemical analysis of lead concentrates--The polarographic method for the determination of bismuth content

WITHDRAWN published on 10.8.1987

Methods for chemical analysis of lead concentrates--The arsenic-bismuth-molybdenum blue spectrophotometric method for the determination of arsenic content

WITHDRAWN published on 10.8.1987

Methods forchemical analysis of lead concentrates--The DTPM spectrophotometric method for the determination of bismuth content

WITHDRAWN published on 10.8.1987

Methods for chemical analysis of lead concentrates—The fire-assaying methods for the determination of gold and silver content

WITHDRAWN published on 31.3.1989

Cryolite natural and artificial--Preparation and storage of test samples

WITHDRAWN published on 1.1.1987

Methods for chemical analysis of cryolite natural and artificial--The gravimetric method for the determination of moisture content

WITHDRAWN published on 1.1.1987

Methods for chemical analysis of cryolite natural and artificial--The conventional test for evaluation of free fluorides content

WITHDRAWN published on 1.1.1987

Natural and artificial cryolite--Determination of sulphur content--X-ray fluorescence spectrometric method

WITHDRAWN published on 1.1.1987

Methods for chemical analysis of cryolite natural and artificial--The electrometric method for the determination of water content

WITHDRAWN published on 1.1.1987