GB/T 24221-2009 (English Version) PDF

Standard No.: GB/T 24221-2009
Language: Chinese, Available in English version
Release Date: 2009
Published By: General Administration of Quality Supervision, Inspection and Quarantine of the People‘s Republic of China
Latest: GB/T 24221-2009

Scope: WARNING: Personnel using this standard should have practical experience in formal laboratory work. This standard does not address all possible safety issues. It is the user's responsibility to take appropriate safety and health measures and ensure compliance with relevant national regulations. This standard specifies the EDTA titration method for the determination of calcium and magnesium content in chrome ore. This standard applies to the determination of calcium and magnesium content in chromium ore. Measuring range (mass fraction): calcium 0.1%-3.20%, magnesium 3.0%-12.00%, this standard should comply with the relevant provisions of GB/T 24228.

GB/T 24221-2009 Referenced Document

GB/T 12805 Laboratory glassware.Burettes *， 2011-12-30 Update
GB/T 12806 Laboratory glassware.One-mark volumetric flasks *， 2011-12-30 Update
GB/T 12808 Laboratory glass instrument single marked line pipette*， 2016-07-01 Update
GB/T 24220 Chromium ores.Determination of hygroscopic moisture content in analytical samples.Gravimetric method
GB/T 24243 Chromium ores.Increment sampling
GB/T 6682 Water for analytical laboratory use.Specification and test methods
ISO 6154 Chromium ores; preparation of samples

2009 GB/T 24221-2009 Chromium ores.Determination of calcium and magnesium contents.EDTA titrimetric method