A Comparative Electrochemical Behaviour Study and Analytical Detection of the p-Nitrophenol Using Silver Solid Amalgam, Mercury, and Silver Electrodes

Table 2

Parameters from the analytical curves for 4-NP for the AgSAE in pure electrolyte and different natural water samples.

Parameter	Electrolyte	Sample 1	Sample 2
𝑟	0.9974	0.9979	0.9955
𝑠 (A/moL L^−1)	0.997 ± 0.026	0.657 ± 0.010	0.456 ± 0.074
Recovery (%)	94.95 ± 0.95	85.96 ± 1.79	72.28 ± 2.65
BOD (mg L^−1)	—	6.0	12.0
COD (mg L^−1)	—	19.0	33.0