**Author details**

Kovacs Emoke Dalma1,2\* and Kovacs Melinda Haydee<sup>2</sup>

\*Address all correspondence to: dalma\_kovacs2005@yahoo.com

1 Chemistry and Chemical Engineering Faculty, Babes Bolyai University, Cluj Napoca, Romania

2 National Institute for Research and Development in Optoelectronics INOE 2000, Subsidiary: Research Institute for Analytical Instrumentation, Cluj Napoca, Romania
