Polyphenolic Natural Products for the Electrochemical Determination of Cadmium

Abstract

International audienceThe goal of this study is to characterize the polyphenolics of the extracts from the skin of Punica granatum. L (pomegranate) and Quercus suber (cork oak). The measurements were performed quantitatively and complexing reactions with metals were characterized for use as sensors in aqueous solution. The qualitative analysis of these extracts by thin-layer chromatography reveals the presence of polyphenols in the extracts that was confirmed by the determination of total polyphenols. These analyses are complemented by high-performance liquid chromatography that shows that Punica granatum. L and Quercus suber are rich in bioactive compounds which affects their reactions with metals. Devices based on the components of the plants reveals high sensitivity and a linear relationship with cadmium ions. The lowest measured concentrations of cadmium were 10−10 M for the pomegranade extract and 10−9 M for the acorn extract

Rapid and on-site simultaneous electrochemical detection of copper, lead and mercury in the Amazon river

“…Electrochemical-based measurements present several advantages that overcome the limitation of these heavy metals detection systems [15]. In particular, stripping voltammetry methods can be considered as a powerful technique for field analysis of heavy metal ions, due to the small size of the equipment, easy installation, accurateness, sensitivity and the possibility of multi-analyte detection [16][17][18][19][20][21]. The use of screen-printed electrodes (SPEs) as electrochemical electrodes for the environmental monitoring of heavy metals has gained popularity over the past decade because of low cost (mass-production), disposability (avoiding tedious pre-treatment steps), versatility and suitability for real-time sensing and, depending on the technique used, ease-of-operation by unskilled users [22].…”

Highly Selective and Sensitive Electrochemical Determination of Ni(II) in Real Samples Based on Ion‐imprinted Polymer Technology

“…Various methods including spectrometry [5][6][7][8][9][10][11][12][13][14][15][16], liquid chromatography [17,18], ion chromatography [19], flame photometry [20] and electrochemical techniques [21][22][23][24][25][26], have been used for the determination of nickel in biological, food, natural water, and wastewater samples. Non-electrochemical methods have basic defects such as long analysis time, low sensitivity and expensive devices, therefore, specific pretreatment process is necessary before the analysis.…”