Voltammetric Determination of Anethole on La₂O₃/CPE and BDDE

Table 4

DPV anethole determination in the range of 0.7–17.5 mg L⁻¹ in 0.1 mol L⁻¹ acetate buffer, pH 6.0 (n = 3).

Electrode	Anethole peak position (mV)	a ± SDa (µA/mg L^−1)	b ± SDb (µA)	r	LOD (mg L^−1)
Electrode diameter 3 mm, area 7.07 mm^2
BDDE	965	0.135 ± 0.003	0.050 ± 0.013	0.9990	0.024
GCE	990	0.306 ± 0.005	0.031 ± 0.046	0.9995	0.011
CPE	1155	0.546 ± 0.036	−0.068 ± 0.083	0.9936	0.006
CeO2/CPE 20%	1125	0.341 ± 0.009	−0.060 ± 0.021	0.9989	0.010
La2O3/CPE 20%	1095	0.885 ± 0.016	0.076 ± 0.069	0.9993	0.004
Electrode diameter 1.5 mm, area 1.77 mm^2
GCE	970	0.022 ± 0.001	0.0035 ± 0.0051	0.9989	0.148
CPE	1110	0.111 ± 0.004	−0.005 ± 0.043	0.9983	0.030
CeO2/CPE 20%	1075	0.227 ± 0.008	−0.054 ± 0.080	0.9978	0.014
La2O3/CPE 20%	1080	0.449 ± 0.021	−0.058 ± 0.044	0.9959	0.007
La2O3/CPE 30%	1095	0.350 ± 0.016	−0.039 ± 0.035	0.9958	0.009
La2O3/CPE 40%	1100	0.332 ± 0.010	0.029 ± 0.110	0.9980	0.010