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Voltammetry Assignment Help
Voltammetry refers to an electroanalysis method which makes of applied potential (E) at the terminal, and requires monitoring of the applied current through electrochemical chamber. This method allows direct analysis of the concentration of components in a sample, and does not require pretreatment nor chemical separation where the effect of composition is negligible, and in determination of coloured substances or sample material with unevenly distributed solid particles. Besides, the method allows for simultaneous as well as quick analysis substances in mixture with improved sensitivity as well as at affordable cost.
Electrochemical methods comprise of the oldest analytical technoiques, particularly the case of mercury electrodes, and they were mainly used in electrochemical analysis of alkaloids . This method is currently a vital analytical tool for studying oxidation-reduction reactions and adsorption properties, to molecular interactions as well as alkaloid analysis. Polarographic methods, such as d.c. polarography are widely been used to analyse various alkaloids, berberine included [255,256]. For instance, there is evidence to show the analysis of berberine under oxidation reagent of H2O2 in medicinal plants . See More About : HNCB 038 Hydraulic Principles And Applications
Although there is no evidence to support electroanalysis of adulterants in phytotherapeutics, there are research report on analysis of amfepramone , which occurs in synthetic mixtures of different potential adulterants using adsorptive stripping voltammetry . There are also research reports on the application of voltammetry in analysis of benzodiazepines, such as the case of formulating synthetic pharmaceuticals as well as biological fluids [258 -265]. When compared with other analytical methods, the voltammetric methods are more advantageous since they possess greater sensitivities, instrumentational costs are lower, and they are simpler to implement. For instance, voltammetric methods have additional advantage over HPLC as well as CE methods since their selectivity for 1,4-benzodiazepines as well as amfepramone during analysis is determined by differential electrochemical behavior associated with electroactive species. In addition, the methods have another advantage over spectroscopic and liquid chromatography methods since they do not require complete filtration of solutions obtained from dissolved tablets and capsules prior to analysis, since the process can still proceed with the solute matter .
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