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Materials, Methods & Technologies, Volume 10, 2016

Habibollah Eskandari, Somayyeh Baghi Sefidan
Pages: 412-423
Published: 11 Jul 2016
Views: 1,884
Downloads: 399
Abstract: An efficient sensing method based on a flow injection manifold has been established for spectrophotometric determination of metoclopramide. The method is based on simple diazotization reaction of metoclopramide with nitrite in acidic medium prior to azo coupling reaction with graphene quantum dots (GQDs). Absorbance was monitored at 423 nm. Effects of various chemical and instrumental parameters were investigated. The analysis of the results of central composite design showed that for obtaining the maximum sensitivity, concentrations of nitrite and hydrochloric acid, and dilution factor for GQDs should be as 1.31 mmol L-1, 0.39 mol L-1 and 2-fold dilution, respectively. Two calibration linear ranges were observed for the determination method. The ranges were: 0.1-10 and 10-40 μg mL-1 of metoclopramide. The method was successfully applied to the determination of metoclopramide in pharmaceutical tablets, without any interference from common excipients. Also, the method was successful for quantitation of metoclopramide in different water matrices.
Keywords: central composite design, flow injection analysis, graphene quantum dots, metoclopramide
Cite this article: Habibollah Eskandari, Somayyeh Baghi Sefidan. GRAPHENE QUANTUM DOTS FOR SPECTROPHOTOMETRIC SENSING OF METOCLOPRAMIDE IN PHARMACEUTICAL AND WATER SAMPLES. Journal of International Scientific Publications: Materials, Methods & Technologies 10, 412-423 (2016).
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