Topic
Buffer solution
About: Buffer solution is a research topic. Over the lifetime, 6948 publications have been published within this topic receiving 112440 citations. The topic is also known as: pH buffer & buffer.
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TL;DR: In this paper, a carbon paste electrode spiked with ferrocene carboxylic acid (FCAMCPE) was constructed by incorporation of ferrocenes carboxyl acid in a graphite powder-paraffin oil matrix, and it has been shown by direct current cyclic voltammetry and double step chronoamperometry that this electrode can catalyze the oxidation of ascorbic acid.
109 citations
TL;DR: In this paper, an electrochemical sensor based on molecularly imprinted polypyrrole membranes is reported for the determination of 2,4-dichlorophenoxy acetic acid.
Abstract: An electrochemical sensor based on molecularly imprinted polypyrrole membranes is reported for the determination of 2,4-dichlorophenoxy acetic acid (2,4-D). The sensor was prepared by electropolymerization of pyrrole on a glassy carbon electrode in the presence of 2,4-D as a template. The template was removed by overoxidation at +1.3 V in buffer solution. The sensor can effectively improve the reductive properties of 2,4-D and eliminate interferences by other pesticides and electroactive species. The peak current at -0.78 V is linear with the concentration of 2,4-D from 1.0 to 10 µM, the detection limit is 0.83 µM (at 3σ), and the relative standard deviation is 3.9% (at 5.0 µM of 2,4-D; n = 7). The method has been successfully applied to the determination of 2,4-D in environmental water samples, with recovery rates ranging from 92% to 108%.
109 citations
TL;DR: The optimum conditions for polyphenoloxidase (PPO) extraction from apple fruit were obtained with a buffer solution above pH 7 containing 15 mM ascorbic acid and 05% of Triton X100.
109 citations
TL;DR: In this article, a cobalt hexacyanoferrate (CoHCF) modified glassy carbon electrode was prepared electrochemically and the voltammetric responses of CoHCF are stable and the electrochemical behaviour is related to the concentrations of supporting electrolyte and counterions.
108 citations
TL;DR: The direct voltammetry and electrocatalytic properties of catalase, which was adsorbed on the surface of multiwall carbon nanotubes (MWCNTs), was investigated, indicating the potential applicability of the films as a new type of reagentless biosensor based on the direct electrochemistry of the catal enzyme.
108 citations