Use of pi-acceptors for spectrophotometric determination of dicyclomine hydrochloride |
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Authors: | Bebawy Lories I Issa Yosry M Abdel Moneim Kamal M |
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Institution: | National Organization for Drug Control and Research, 6 Hussen Kamal El-Deen, Ben el Sariat, Dokki, Giza 12311, Egypt. bebawy_lories@yahoo.com |
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Abstract: | Simple, rapid, accurate, and sensitive spectrophotometric methods are described for the determination of dicyclomine hydrochloride. The methods are based on the reaction of this drug as an n-electron donor with 2,3-dichloro-5,6-dicyano-p-benzoqunione (DDQ), p-chloranilic acid (p-CA), and chloranil (CL) as pi-acceptors to give highly colored complex species. The colored products are measured spectrophotometrically at 456, 530, and 650 nm for DDQ, p-CA, and CL, respectively. Optimization of the different experimental conditions were studied. Beer's law was obeyed in concentration ranges of 20-100, 50-250, and 80-600 microg/mL for DDQ, pCA, and CL, respectively. Colored complexes are produced in organic solvents and are stable for at least 1 h. The methods were applied to Spasmorest antispasmotic tablets and ampoules with good accuracy and precision. |
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