Abstrak 
Voltammetric Determination Of Cr(VI) Using Gold Nanoparticles Modified Glassy Carbon Electrode
Santhy Wyantuti, Safri Ishmayana, Yeni Wahyuni Hartati
Universitas Padjadjaran, International Symposium on Applied Chemistry 2015 (ISAC 2015), Published by Elsevier B.V., doi:10.1016/i.proche.2015.12.010
Bahasa Inggris
Universitas Padjadjaran, International Symposium on Applied Chemistry 2015 (ISAC 2015), Published by Elsevier B.V., doi:10.1016/i.proche.2015.12.010
chromium(IV), glassy carbon electrode, gold nanoparticle, voltammetry
Gold nanoparticles-modified glassy carbon electrode was utilized in the present study to determine trace amount of Cr(VI). The steps employed in the present study were fabrication of gold nanoparticle colloids. modification of glassy catbon electrode using the gold nanopanicle colloids. and voltammetric detemtination of Cr(VI) using the modified electrode. The results of the present study indicate that 290 uL of 0.1 M NaBH4 was required to form gold nanoparticles colloids. Self assembly process was found to give better gold nanopanicles binding onto glassy carbon electrode compared to adsorption proms as indicated by more gold nanopanicles attached onto the glassy carbon elxtrode. Modification of the glassy carbon electrode using gold nanopanicles increase sensitivity as indicated by good limit of detection (2.38 ng/L) with an acceptable linearity range within 0.050 – 0.250 ug/L. The correlation coefficient and precision of the method were 0.9948 and 99.14% respectively.