Three-dimensional voltammetry: Use of chronoamperometric E-t-i data to achieve second-order advantage

Abstract

This work studied the use of three-dimensional voltammetry, particularly potential-time-current (Et-i) data, on the development of electroanalytical methods. E-t-i data was obtained by taking chronoamperograms at potentials applied as pulses on a staircase waveform. By using this threeway kind of data and appropriate calibration algorithms, the possibility of achieving the secondorder advantage was evaluated in the determination of ferrocyanide in the presence of the uncalibrated interference hydroquinone as a model system. The determination of acetaminophen in urine samples, where ascorbic acid and uric acid play the major roles as interferents was also studied. Parallel factor analysis (PARAFAC) and multivariate curve resolution alternating leastsquares (MCR-ALS) were the algorithms employed in this work. Both algorithms successfully achieved the second-order advantage by correctly predicting the concentrations of the validation synthetic samples. Excellent predictions were obtained in the direct analysis of acetaminophenspiked urine samples by E-t-i data and MCR-ALS.

More effective peroxymonosulfate activation for tetracycline removal by Co–FeN/@BC assisted by micro-electrolysis: performance and mechanism

“…However, when the temperature is too high, the breakdown of organic ligands could speed up, leading to the destruction of the internal structure of MOFs, thereby reducing degradation efficiency. 28,29 Fig. 4b shows the EIS and LSV diagrams of Co-Fe/N@BC prepared at different calcination temperatures and loaded on conductive glass, where the radius is the smallest at 800 °C, indicating the smallest resistance and the best electrochemical performance.…”