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This is to certify that your paper entitled «Preparation and characterization of carbon paste electrode modified by nickel oxide and cobalt oxide nanoparticles: investigation of electrochemical behavior of these electrodes in clindamycin hydrochloride» was indexed with 23 pages, in the CIVILICA citation database, code COI:NANOD01_065, after evaluation and approval of the referees of the "National Conference on Nanotecnology Development held in Aliabad 2018.

While offering our congratulations on the indexation of your paper, please be informed that this certificate is prepared based on the information submitted by the secretariat of the above conference and the information contained in the CIVILICA database, and the accuracy of its content can be inquired at any time through link provided at the bottom of the page or scanning the code image.