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Register a new userDetermination of Captopril in Pharmaceutical Formulations Using Adsorptive Cathodic Stripping Voltammetry
تحديد الكابتوبريل في المستحضرات الصيدلانية باستخدام طريقة التعرية الكاتودية الامتزازية الفولط مترية
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دُرس السلوك الفولط أمبيرومتري للكابتوبريل بوجود أيونات النحاس الثنائي باستخدام طريقة التعرية الكاتودية الامتزازية الفولط مترية على مسرى قطرة الزئبق المعلقة.
The voltammetric behavior of captopril in presence of copper ions was investigated by using adsorptive cathodic stripping voltammetry at hanging mercury drop electrode.
References used
BRUNTON L., LAZO J., PARKER, K., 2001- Goodman and Gilman’s, The Pharmacological Basis of Therapeutics, 10th ed, McGraw-Hill
PARFITT K., 1999- Martindale: The Complete Drug Reference, The Pharmaceutical Press (Ph P), 720, 836
CUSHMAN D. W., CHEUNG H. S., SABO E. F., ONDETTI M. A., 1977- Design of Potent Competitive Inhibitors of Angiotensin-Converting Enzyme. Carboxyalkanoyl and Mercaptoalkanoyl Amino Acids, Biochemistry, 16, 5484- 5491
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A sensitive, simple and selective spectrofluorimetric method
has been proposed for determination Captopril (CPT) in pure form
and pharmaceutical preparations. This method depends on the
formation of complex between Captopril and Copper (II) at
pH=3.5.
Simple, accurate and reliable spectrophotometric method
has been developed for the quantitative determination of
Cephalosporins: Cefaclor, Cefalexin, Cefadroxil in pure and
pharmaceutical formulations. The method is based on the
determination of that in aqueous medium pH=6.45 at
25±0.5ºC.
A new, simple and sensitive kinetic spectrophotometric
method has been proposed for the determination of tropicamed
(TPC) in pure and pharmaceutical formulations. The method is
based on oxidation TPC by potassium permanganate in strong
alkaline m
edium (pH=12) to form green colored product with
absorbance maximum at 610nm.
New, accurate, sensitive and reliable kinetic spectrophotometric
method for the assay of fluvastatin sodium (FVS) in pure form and
capsules has been developed. The method involves the oxidative
coupling reaction of FVS with 3-methyl-2-benzothiazolinone hydrazone
hydrochloride monohydrate (MBTH) in the presence of Ce(IV) in an
acidic medium to form colored product with lambdamax at 615 nm.
This research study the effect of the most important conditions on the voltammetric curves of lead and copper to reach the optimal conditions for the simultaneous determination of these elements by Differential pulse anodic stripping voltammetry (DPA
SV) using a hanging mercury drop electrode (HMDE) as a working electrode.
The results showed that the optimal conditions for the simultaneous determination of lead and copper by using nitric acids electrolyte 3M,were when applying scanning field from -700 mV to +150 mV, accumulation potential -800 mV, the time of the accumulation 80 sec, speed rate 40 mV/sec, and the amplitude pulse 70mV,
where the peak currents were IP (Pb) = 274.2 nA, IP (Cu) = 630.5 nA, at peak potentials EP (Pb) = -380 mV, EP (Cu) = +40 mV, by applying the previous conditions, the limits of detection reached 1.05μg/l for lead 2.45 μg/l for copper. The retrieval coefficient calculated to make sure accuracy of the method and it reached 103.90% and copper 101.70% and to indicate the precision of the way by the standard deviation was the value of the standard deviation for lead 0.027 mg/l, and copper 0.013 mg/l. the method applied under its own conditions by examined on some of environmental and samples and showed success and high efficiency
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