The Test and Calibration Laboratory of ZOK Sp. z o.o. is accredited by the Polish Centre for Accreditation for the performance of tests and measurements.

We perform the following tests:

• Testing the physical properties of hard black coal samples, including:
  • determination of the total moisture content using the gravimetric method,
  • determination of the moisture content of an analytical sample using the thermogravimetric method,
  • determination of volatile components using the thermogravimetric method,
  • determination of the ash content using the thermogravimetric method,
  • determination of the real density according to the PN-G-04537 standard
  • measurement of the diffusion coefficient and sorption capacity using the thermogravimetric method.
     
• Analyses of the qualitative and quantitative composition of gas samples extracted from black coal, and gas samples of a natural origin. We analyse gas samples using the gas chromatography method (GC-TCD), with respect to determining the amount of:
  • oxygen (O₂),
  • carbon dioxide (CO₂),
  • methane (CH₄),
  • ethane (C₂H₆),
  • propane (C₃H₈),
  • nitrogen (N₂),
  • hydrogen (H₂),
  • ethylene (C₂H₄),
  • carbon monoxide (CO).

• Badania składu jakościowego i ilościowego próbek powietrza pobranych na stanowiskach pracy metodą izolacyjną. Badania próbek powietrza wykonujemy metodą chromatografii gazowej (GC-TCD), w zakresie oznaczania zawartości:
  • ditlenku węgla (CO2),
  • propanu (C3H8),
  • metanu (CH4).
    
• Na podstawie wyników badań fizyko-chemicznych próbek węgla oraz wyników badań składu jakościowego i ilościowego gazu pozyskanego z tych próbek, obliczamy metanonośność pokładów węgla kamiennego.
  
• On the basis of the qualitative and quantitative composition, we perform the following calculations for fuel gases:
  • calorific value,
  • heat of combustion,
  • density,
  • Wobbe index,
  • total elemental carbon content,
  • CO₂ emission rate (based on the calculated gas composition).



• Under its PCA accreditation, the Test and Calibration Laboratory performs measurements of the amounts of the gaseous components of reference materials with respect to:
  • the carbon monoxide content of a gas mixture,
  • the methane content of a gas mixture,
  • the carbon dioxide content of a gas mixture.