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GB/T 24224-2009 Chromium ores—Determination of sulfur content—Combustion-neutralization titration method,combustion-potassium iodate titration method and combustion-infrared absorption method $210.00 via email in 1~3 business day valid
GB/T 24225-2009 Chromium ores—Determination of total iron content—Titrimetric method after reduction $150.00 via email in 1~3 business day valid
GB/T 24226-2009 Chromium ores and concentrates—Determination of calcium contents—Flame atomic absorption spectrometric method $150.00 via email in 1~2 business day valid
GB/T 24227-2009 Chromium ores and concentrates—Determination of silicon content—Spectrophotometric method and gravimetric method $150.00 via email in 1~3 business day valid
GB/T 24228-2009 Chromium ores and concentrates—Methods of chemical analysis—General instruction $80.00 via email in 1~3 business day valid
GB/T 24229-2009 Chromium ores and concentrates—Determination of aluminium content—Complexometric method $140.00 via email in 1~3 business day valid
GB/T 24230-2009 Chromium ores and concentrates—Determination of chromium content—Titrimetric method $140.00 via email in 1~3 business day valid
GB/T 24231-2009 Chrome ores—Determination of magnesium aluminum silicon calcium titanium vanadium chrome manganese iron and nickel content—Wavelength dispersive X-ray fluorescence spectrometric method $210.00 via email in 1~2 business day valid
GB/T 24232-2009 Manganese and chromium ores—Experimental methods for checking the bias of sampling and sample preparation $160.00 via email in 1~3 business day valid
GB/T 24233-2009 Manganese and chromium ores—Experimental methods for evaluation of quality variation and methods for checking the precision of sampling $210.00 via email in 1~3 business day valid
GB/T 24235-2009 Iron ores for shaft direct-reduction feedstocks—Determination of the low temperature reduction-disintegration index and degree of metallization $150.00 immediately valid
GB/T 24236-2009 Iron ores for shaft direct-reduction feedstocks—Determination of the reducibility index final degree of reduction and degree of metallization $210.00 via email in 1~3 business day valid
GB/T 24237-2009 Iron ore pellets for shaft direct-reduction feedstocks—Determination of the clustering index $210.00 via email in 1~3 business day valid
GB/T 24239-2009 Direct reduced iron and hot briquetted iron—Sampling and sample preparation $360.00 via email in 1~5 business day valid
GB/T 24240-2009 Direct reduced iron—Determination of apparent density and water absorption of hot briquetted iron (HBI) $160.00 via email in 1~3 business day valid
GB/T 24241-2009 Direct reduced iron—Determination of the tumble and abrasion indices of hot briquetted iron (HBI) $140.00 via email in 1~3 business day valid
GB/T 24243-2009 Chromium ores—Increment sampling $220.00 via email in 1~3 business day valid
GB/T 24515-2009 Iron ores for blast furnace feedstocks-Determination of the reducibility by the rate of reduction index $190.00 via email in 1~3 business day valid
GB/T 24519-2009 Manganese ores—Determination of magnesium,aluminum,silicon,phosphorus,sulfur,potassium,calcium,titanium,manganese,iron,nickel,copper,zinc,barium and lead content—Wavelength dispersive $220.00 via email in 1~3 business day valid
GB/T 24530-2009 Iron ores for blast furnace feedstocks—Determination of reduction under load $220.00 via email in 1~3 business day valid
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