"Excellence Laboratory Technische Compliance Level III" by GAZ GmbH (Attestation no. GAZ-TCL-12-02-14-01)

CERTIFIED REFERENCE MATERIAL
SX36-09
Gravel

Version: 004      Date of certification: 16.10.17      Sample form: Powder < 0.125 mm
Analyte Unit Certified value Confidence
interval (95%)		 No. of independent
repeated series		 Measuring
method*		 
  CaO
  SiO2
  Fe2O3
  Mn3O4
  P2O5
     
  %
  %
  %
  %
  %
     
      0.047
     96.44
      0.703
      0.020
      0.019
     
      0.003
      0.21
      0.007
      0.001
      0.002
     
 3
 4
 4
 3
 3
     
1
1
1
1
1
   
  Al2O3
  MgO
  TiO2
  Na2O
  K2O
     
  %
  %
  %
  %
  %
     
      1.46
      0.104
      0.086
      0.045
      0.334
     
      0.01
      0.004
      0.004
      0.001
      0.002
     
 4
 4
 4
 3
 4
     
1
1
1
2
1
   
  Cr2O3
  Co3O4
  CO2
  H2O 900°C
     
  %
  %
  %
  %
     
      0.029
      0.005
      0.010
      0.48
     
      0.003
    < 0.001
    < 0.001
      0.02
     
 3
 3
 3
 4
     
1
1
3
4
* Measuring method
1: X-ray fluorescence spectrometry
2: Atomic absorption spectrometry
3: Digestion by acids, coulometric detection
4: detection with IR-/ UV-absorption after Combustion

Comment
Thermal treatment of material before weighing: 900°C, 1 h