Simultaneously determination of bisphenol A and uric acid by zinc/aluminum-layered double hydroxide-2-(2,4 dichlorophenoxy) propionate paste electrode

A novel zinc/aluminium-layered double hydroxide-2-(2,4-dichlorophenoxy) propionate (Zn/Al-LDH
DPPA) nanocomposite to modify with multi-walled carbon nanotube (MWCNT) paste electrode for
simultaneously determination of uric acid and bisphenol A. The Zn/Al-LDH-DPPA/MWCNT
morphology was carried out by a scanning electron microscope and transmission electron microscope,
electrode-electrolyte interface properties were examined by electrochemical impedance spectroscopy,
and electrochemical responses thoroughly investigated by square-wave voltammetry. The electrode
established linear plot for uric acid and bisphenol A from 5.0 x 10—6 M to 7.0 x 10—4 M (R2 = 0.9980)
and (R2 = 0.9960) and the detection limits were 7.95 x 10—7 M and 8.71 x 10—7 M (S/N=3). The as
prepared sensor is reproducible, highly stable, sensitive as well as ascribed good anti-interference
ability.
The Zn/Al-LDH-DPPA/MWCNT electrode is applicable to evaluate simultaneously
determination of UA and BPA in lake, river and, urine samples with good percentage recovery.