Methods for chemical analysis of tungsten concentrates—The EDTA volumetric method for the determination of calcium content

NEPLATNÁ vydaná dňa 21.6.1985

Methods for chemical analysis of tungsten concentrates—Determination hygroscopic moisture content—Gravimetric method

NEPLATNÁ vydaná dňa 31.3.2008

Methods for chemical analysis of tungsten concentrates—The atomic absorption spectrophotometric method for the determination of calcium content

NEPLATNÁ vydaná dňa 21.6.1985

Methods for chemical analysis of tungsten concentrates—The gravimetric method for the determination hygroscopic moisture content

NEPLATNÁ vydaná dňa 21.6.1985

Methods for chemical analysis of tungsten concentrates—Determination of molybdenum content—The thiocyanate spectrophotometry

NEPLATNÁ vydaná dňa 30.10.2009

Methods for chemical analysis of tungsten concentrates—The chlorosulphophenol S photometric method for the determination niobium content; The butylrhodamine B extraction photometric method for the determination tantalum content

NEPLATNÁ vydaná dňa 21.6.1985

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NEPLATNÁ vydaná dňa 1.1.1985

Textiles—Tests for colour fastness—General principle of testing

NEPLATNÁ vydaná dňa 9.6.1997

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NEPLATNÁ vydaná dňa 1.1.1985

Self-roasting carbon bricks for calcium carbide furnace

NEPLATNÁ vydaná dňa 1.1.1985