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

CERTIFIED REFERENCE MATERIAL
SE21-75
unalloyed steel

Version: 003      Date of certification: 09.10.09      Sample form: Milling 0.200-1.400 mm

Analyte Unit Certified value Confidence
interval (95%)		 No. of independent
repeated series		 Measuring
method*		 
  C
  S
 
  %
  %
 
      0.1290
      0.0181
 
      0.0017
      0.0007
 
12
12
 
1
2
* Measuring method
1: Combustion with coulometric detection
2: Combustion with IR-detection