Determination of verapamil by adsorptive stripping voltammetry in urine and pharmaceutical formulations
A sensitive reduction peak of verapamil is obtained by adsorptive stripping voltammetry in 0.01 M phosphate (pH 7.4) at an accumulation time of 30 s. The peak potential is −1.81 V (vs. Ag/AgCl). The peak current is directly proportional to the concentration of verapamil (1×10 −8–1×10 −6 M), with a 3...
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Published in | Journal of pharmaceutical and biomedical analysis Vol. 30; no. 4; pp. 921 - 929 |
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Main Authors | , , , |
Format | Journal Article |
Language | English |
Published |
Amsterdam
Elsevier B.V
07.11.2002
Elsevier Science |
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Abstract | A sensitive reduction peak of verapamil is obtained by adsorptive stripping voltammetry in 0.01 M phosphate (pH 7.4) at an accumulation time of 30 s. The peak potential is −1.81 V (vs. Ag/AgCl). The peak current is directly proportional to the concentration of verapamil (1×10
−8–1×10
−6 M), with a 3
σ detection limit of 5×10
−10 M (0.246 ng/ml). The R.S.D. at the 1×10
−7 M level is 1.8%. The interference of some metal ions, and some amino acids, and the application of the method to analysis of urine, and pharmaceutical formulations are described. The method is simple (no extraction), rapid (30 s accumulation time), sensitive (the detection limit of verapamil is 0.491 ng/ml), reproducible(within day R.S.D. of 1.28–1.8%), and suitable for routine analysis of verapamil, urine, and pharmaceutical formulation. |
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AbstractList | A sensitive reduction peak of verapamil is obtained by adsorptive stripping voltammetry in 0.01 M phosphate (pH 7.4) at an accumulation time of 30 s. The peak potential is -1.81 V (vs. Ag/AgCl). The peak current is directly proportional to the concentration of verapamil (1 x 10 super(-8)-1 x 10 super(-6) M), with a 3 sigma detection limit of 5 x 10 super(-10) M (0.246 ng/ml). The R.S.D. at the 1 x 10 super(-7) M level is 1.8%. The interference of some metal ions, and some amino acids, and the application of the method to analysis of urine, and pharmaceutical formulations are described. The method is simple (no extraction), rapid (30 s accumulation time), sensitive (the detection limit of verapamil is 0.491 ng/ml), reproducible (within day R.S.D. of 1.28-1.8%), and suitable for routine analysis of verapamil, urine, and pharmaceutical formulation. A sensitive reduction peak of verapamil is obtained by adsorptive stripping voltammetry in 0.01 M phosphate (pH 7.4) at an accumulation time of 30 s. The peak potential is -1.81 V (vs. Ag/AgCl). The peak current is directly proportional to the concentration of verapamil (1x10(-8)-1x10(-6) M), with a 3sigma detection limit of 5x10(-10) M (0.246 ng/ml). The R.S.D. at the 1x10(-7) M level is 1.8%. The interference of some metal ions, and some amino acids, and the application of the method to analysis of urine, and pharmaceutical formulations are described. The method is simple (no extraction), rapid (30 s accumulation time), sensitive (the detection limit of verapamil is 0.491 ng/ml), reproducible(within day R.S.D. of 1.28-1.8%), and suitable for routine analysis of verapamil, urine, and pharmaceutical formulation. A sensitive reduction peak of verapamil is obtained by adsorptive stripping voltammetry in 0.01 M phosphate (pH 7.4) at an accumulation time of 30 s. The peak potential is −1.81 V (vs. Ag/AgCl). The peak current is directly proportional to the concentration of verapamil (1×10 −8–1×10 −6 M), with a 3 σ detection limit of 5×10 −10 M (0.246 ng/ml). The R.S.D. at the 1×10 −7 M level is 1.8%. The interference of some metal ions, and some amino acids, and the application of the method to analysis of urine, and pharmaceutical formulations are described. The method is simple (no extraction), rapid (30 s accumulation time), sensitive (the detection limit of verapamil is 0.491 ng/ml), reproducible(within day R.S.D. of 1.28–1.8%), and suitable for routine analysis of verapamil, urine, and pharmaceutical formulation. |
Author | El-Haty, M.T Ahmed, Mahasen M Kasim, Ensaf Aboul Ghandour, M.A |
Author_xml | – sequence: 1 givenname: Ensaf Aboul surname: Kasim fullname: Kasim, Ensaf Aboul email: ensafa@yahoo.com organization: Chemistry Department, Faculty of Education, El-Kharga Oasis New Valley, Assiut University, Assiut, Egypt – sequence: 2 givenname: M.A surname: Ghandour fullname: Ghandour, M.A organization: Chemistry Department, Faculty of Science, Assiut University, Assiut 71516, Egypt – sequence: 3 givenname: M.T surname: El-Haty fullname: El-Haty, M.T organization: Chemistry Department, Faculty of Science South Valley University, Aswan, Egypt – sequence: 4 givenname: Mahasen M surname: Ahmed fullname: Ahmed, Mahasen M organization: Chemistry Department, Faculty of Science South Valley University, Aswan, Egypt |
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Keywords | Urine Verapamil Verapamil ampoule Adsorption Voltammogram Biological fluid Injectable form Analysis method Parenteral form Calcium antagonist Aralkylamine Dosage form Antihypertensive agent Voltammetry Quantitative analysis |
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Snippet | A sensitive reduction peak of verapamil is obtained by adsorptive stripping voltammetry in 0.01 M phosphate (pH 7.4) at an accumulation time of 30 s. The peak... |
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SubjectTerms | Adsorption Analysis Biological and medical sciences Chemistry, Pharmaceutical Electrochemistry - methods General pharmacology Humans Medical sciences Pharmacology. Drug treatments Urine Verapamil Verapamil - analysis Verapamil - chemistry Verapamil - pharmacokinetics Verapamil - urine Verapamil ampoule Voltammogram |
Title | Determination of verapamil by adsorptive stripping voltammetry in urine and pharmaceutical formulations |
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