Laboratory accredited by GAZ, (Association for the Accreditation and Certification GmbH) Attestation no. 91021

CERTIFIED REFERENCE MATERIAL
SX11-37
Iron ore

Version: 002      Date of certification: 24.11.08      Sample form: Powder < 0.100 mm

Analyte Unit Certified value Confidence
interval (95%)		 No. of independent
repeated series		 Measuring
method*		 
  CaO
  SiO2
  Fe
  FeO
  Mn
 
  %
  %
  %
  %
  %
 
      1.930
      2.365
     66.15
      0.32
      0.038
 
      0.004
      0.009
      0.10
      0.05
      0.002
 
 4
 4
 4
 3
 4
 
1
1
1
2
1
 
  P2O5
  S
  Al2O3
  MgO
  TiO2
 
  %
  %
  %
  %
  %
 
      0.113
      0.003
      0.442
      0.164
      0.032
 
      0.001
      0.001
      0.005
      0.005
      0.001
 
 4
 3
 4
 4
 3
 
1
3
1
1,4
1
 
  Na2O
  K2O
  Cr2O3
  CO2
  C tot.
 
  %
  %
  %
  %
  %
 
      0.020
      0.011
      0.017
      0.089
      0.101
 
      0.001
    < 0.001
      0.001
      0.003
      0.001
 
 6
 7
 4
 3
 3
 
4
1,4
1
5
3
 
  H2O 900°C
 
  %
 
      0.080
 
      0.007
 
 4
 
6
* Measuring method
1: X-ray fluorescence spectrometry
2: Titrimetry
3: Combustion with IR-detection
4: Atomic absorption spectrometry
5: Digestion by acids, coulometric detection
6: detection with IR-/ UV-absorption after combustion

Comment
Thermal treatment of material before weighing: 105°C, 4 h