Enzyme free square wave voltammetry determination of bisphenol A at zinc hydroxide nitrate sodium dodecylsulfate bispyriba chitosan modified electrode in environmental water

Author : Illyas Md Isa, Mohamad Syahrizal Ahmad, Nor Mahani Ismail

Abstract :An electrochemical chemical sensor for the detection of bisphenol A (BPA) with a broad working range and high sensitivity was done by a multiwall carbon nanotube modified with zinc hydroxide nitrate sodium dodecylsulfate bispyribac chitosan nanocomposite (ZHN-SDS BP Chi/ MWCNT). The conductivity of MWCNT has increased with the addition of ZHN-SDS BP Chi as a conducting matrix. Scanning electron microscopy was used to characterize the morphology of ZHN-SDS BP Chi/MWCNT, and square wave and cyclic voltammetry were used to study the electrochemical behaviour of BPA and K3[Fe(CN)6] at the paste electrode of the ZHN-SDS BP Chi/MWCNT, respectively. By presenting a small amplitude square wave voltage to a scanning potential between -0.3 and +1.0 volts, square wave voltammetry can be carried out with a high sensitivity and fast response time. Under the optimized experimental circumstances, the electrode established linear plot for BPA doses 1.0 x 10-7 M to 7.0 10-4 M (R2 = 0.9904) and limit of detection was calculated to be 4.28 x 10-8 M (S/N = 3). Urine samples and lake water were successfully treated with the manufactured ZHN-SDS BP Chi/MWCNT electrode, which demonstrated good stability and repeatability and proved valuable for analytical applications.

Keywords :Modified MWCNT, zinc hydroxide nitrate sodium dodecylsulfate bispyribac Chi, bisphenol A

Conference Name :International Conference on Environment and Life Science (ICELS-25)

Conference Place Istanbul, Turkey

Conference Date 29th May 2025