Research Mobility Grant Researcher

Dr. Tanil Tarhan is a senior research scientist at the National Metrology Institute (TUBITAK) in Turkey since 2006 and has 3 years of experience in gas metrology. Tanil worked as a research assistant in Middle East Technical University between 1997 and 2004. He is also the contact person for the EURAMET "Focus Group on Facilitating National Metrology Infrastructure Development" since 2011 and a member of "CCQM - Gas Analysis Working Group (GAWG)" since January 2012. Tanil has experience with the preparation of gas mixtures and gas analysis on GC and monitors. In addition, he has recently participated in the inter-laboratory comparison "EURAMET Project 1166: CO2 in N2, 0.01-0.05 mol/mol".

The overall objective of the RMG is the development of measurement methods for the detection of NO2 zero gas impurities. The scientific and technical objectives are:

  • To prepare NO2 gas mixture standards at low level using different dynamic dilution methods, such as molbloc/molbox systems or mass flow controllers and syringe injection. To then compare these preparation methods by measuring the prepared gas mixture standards with a chemiluminescence trace analyser.
  • To prepare "contaminated" zero gas. This requires special attention as the method of contamination used to achieve accurate concentrations is critical for the evaluation of the filter efficiency. 



Early Stage Research Mobility Grant Researcher

Nikola Skundric is metrologist in the Group for optical and physics-chemical quantities in DMDM, Belgrade, Serbia. In 2011, after he has graduated on Chemical Faculty, he has started working in DMDM. During this time he has set up GC-FID method for calibration of ethanol in aqueous solutions.

The aim of ESRMG is to determine the residual fraction of the NO after the purification step or an upper limit in case this level is below the detection limit of the analyser. The main challenges relating to this task are as follows:

  • To calibrate the chemiluminescence instrument in the 0-10 nmol/mol range.
  • To prevent spurious nitric oxide readings due to e.g. ingress of atmospheric, leakages, backflow, or desorption from the flow system.