Dipl. Chemist K. Pantazis together with MSc Chemists T. Pentovolou and E. Giouni, of the Analytical Chemistry Dept. of ELKEME participated in the 7^th Tactical National Metrology Conference (METROLOGY 2018) held in Athens, Greece from the 11th to the 12th May 2018.  The Conference was organized by HellasLab, ICCS and NTUA – ECE and presented the problems arising in providing reliable results to every scientific field (electrical, physical, chemical, radiation, pharmaceutical etc). Tactical National Metrology Conferences are the meeting point of scientists who are deeply involved in the metrology field and its development, in the frame of a Quality Assurance System, is among their principal objectives.  This is the basis for achieving improved results, thus increasing the effectiveness of every kind of measurement system.