Maurício A. P. Papi, Márcio F. Bergamini, Luiz H. Marcolino-Junior
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引用次数: 0
Abstract
This work describes a carbon composite modified electrode (CCME) easily prepared using a simple mixture of a commercial cation exchange resin (Amberlite IR 120H) as modifier, graphite powder and paraffin, which was successfully used for spontaneous preconcentration and voltametric determination of carbendazim (CBZ) in juice samples. Parameters such as amount of resin used in the composition of the electrode, pH and preconcentration time as well as instrumental parameters of differential pulse voltammetry (DPV) were studied. Under optimized conditions, the proposed sensor shows to be able to preconcentrate CBZ at an open circuit potential (OCP) condition and presented the highest analytical response in comparison to the unmodified electrode. An analytical curve was obtained for the CBZ determination employing the proposed CCME and showed a linear dynamic range (LDR) between 80.0 nmol L−1 to 2.0 μmol L−1, with a LOD of 19 nmol L−1 and LOQ of 65 nmol L−1. The effect of concomitants on the voltametric response was evaluated by addition and recovery study and a good selectivity was found. The proposed sensor was successfully applied for the determination of CBZ in spiked mango juice samples without any pretreatment.
期刊介绍:
Electroanalysis is an international, peer-reviewed journal covering all branches of electroanalytical chemistry, including both fundamental and application papers as well as reviews dealing with new electrochemical sensors and biosensors, nanobioelectronics devices, analytical voltammetry, potentiometry, new electrochemical detection schemes based on novel nanomaterials, fuel cells and biofuel cells, and important practical applications.
Serving as a vital communication link between the research labs and the field, Electroanalysis helps you to quickly adapt the latest innovations into practical clinical, environmental, food analysis, industrial and energy-related applications. Electroanalysis provides the most comprehensive coverage of the field and is the number one source for information on electroanalytical chemistry, electrochemical sensors and biosensors and fuel/biofuel cells.