Electrochemical Behavior of Quinoxalin-2-one Derivatives at Mercury Electrodes and Its Analytical Use

Table 6

Determination of derivatives of I–III, method of standard additions (number of measurements 𝑛=4).

Analyte	Method	Mean content 𝑥[μg/mL]	RSD 𝑠𝑟[%]	Relative mean error ε [%]	Electrolyte
I	DPV	0.160	3.23	−0.24	0.001 M NaOH
I	DPV	0.065	3.02	3.08	0.1 M HCl
II	DPV	0.192	3.68	1.85	0.001 M NaOH
III	DPV	0.0187	1.84	4.84	B.-R. buffer, pH 7.0
III	DPP	0.0170	2.10	−3.25	B.-R. buffer, pH 7.0