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GSO ISO 9681:2017
ISO 9681:1990
Gulf Standard
Manganese ores and concentrates -- Determination of iron content -- Flame atomic absorption spectrometric method
GSO ISO 5889:2017
ISO 5889:1983
Gulf Standard
Manganese ores and concentrates -- Determination of aluminium, copper, lead and zinc contents -- Flame atomic absorption spectrometric method
GSO ISO 8530:2017
ISO 8530:1986
Gulf Standard
Manganese and chromium ores -- Experimental methods for checking the precision of sample division
GSO ISO 8541:2017
ISO 8541:1986
Gulf Standard
Manganese and chromium ores -- Experimental methods for checking the bias of sampling and sample preparation
GSO ISO 8542:2017
ISO 8542:1986
Gulf Standard
Manganese and chromium ores -- Experimental methods for evaluation of quality variation and methods for checking the precision of sampling
GSO ISO 8531:2017
ISO 8531:1986
Gulf Standard
Manganese and chromium ores -- Experimental methods for checking the precision of moisture determination
GSO ISO 7969:2017
ISO 7969:1985
Gulf Standard
Manganese ores and concentrates -- Determination of sodium and potassium contents -- Flame atomic absorption spectrometric method
GSO ISO 7990:2017
ISO 7990:1985
Gulf Standard
Manganese ores and concentrates -- Determination of total iron content -- Titrimetric method after reduction and sulfosalicylic acid spectrophotometric method
GSO ISO 9292:2017
ISO 9292:1988
Gulf Standard
Manganese ores and concentrates -- Determination of total iron content -- 1,10-Phenanthroline spectrometric method
GSO ISO 619:2017
ISO 619:1981
Gulf Standard
Manganese ores -- Determination of chromium content -- Diphenylcarbazide photometric method and silver persulphate titrimetric method
GSO ISO 320:2015
ISO 320:1981
Gulf Standard
Manganese ores -- Determination of sulphur content -- Barium sulphate gravimetric methods and sulphur dioxide titrimetric method after combustion
GSO ISO 4571:2015
ISO 4571:1981
Gulf Standard
Manganese ores and concentrates -- Determination of potassium and sodium content -- Flame atomic emission spectrometric method