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CCQM-K57
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CCQM-K57
Information
Metrology area, branch   Amount of Substance, Inorganics
Description   Chemical composition of clay
Time of measurement   2007
Status   Approved for equivalence, Results available
Reference(s)   Metrologia, 2009, 46, Tech. Suppl., 08020
Measurand   Mass fraction of SiO2: ~ 650 mg/g to 700 mg/g
Mass fraction of MgO: ~ 5 mg/g to 15 mg/g
Mass fraction of CaO: ~ 10 mg/g to 50 mg/g
Mass fraction of Fe2O3: ~ 20 mg/g to 100 mg/g
Mass fraction of Al2O3: ~ 100 mg/g to 200 mg/g
Transfer device(s)   Dedicated samples
Comparison type   Key comparison
Consultative Committee  CCQM (Consultative Committee for Amount of Substance)
Conducted by   CCQM (Consultative Committee for Amount of Substance)