Spectrophotometric study of the complexation equilibria of iron(III) with 3-hydroxypicolinic acid and determination of iron in pharmaceutical preparations

2007 ◽  
Vol 58 (3) ◽  
pp. 231-236 ◽  
Author(s):  
Mohamed S. Abu-Bakr
Keyword(s):  
Pharmaceutical Preparations ◽  
Spectrophotometric Study ◽  
Complexation Equilibria

Spectrophotometric study of the complexation equilibria of zirconium(IV) with 1-amino-4-hydroxyanthraquinone and the determination of zirconium

The Analyst ◽  
1988 ◽  
Vol 113 (11) ◽  
pp. 1643 ◽  
Author(s):  
Kamal A. Idriss ◽  
Mohamed M. Seleim ◽  
Magda S. Saleh ◽  
M. S. Abu-Bakr ◽  
Hassan Sedaira
Keyword(s):  
Spectrophotometric Study ◽  
Complexation Equilibria

Spectrophotometric study of the complexation equilibria of lanthanum(III) with 1,4-bis(4′-methylanilino)anthraquinone and the determination of lanthanum(III)

The Analyst ◽  
1985 ◽  
Vol 110 (6) ◽  
pp. 709-712 ◽  
Author(s):  
Kamal Abdel-Rahman Idriss ◽  
A. A. Harfoush ◽  
A. S. El-Shahawy ◽  
Hassan Sedaira
Keyword(s):  
Spectrophotometric Study ◽  
Complexation Equilibria

A spectrophotometric study of the complexation equilibria and the determination of nickel(II) with 4-(2-pyridylazo)resorcinol, 4-(2-thiazolylazo)resorcinol, and 2-(5-bromo-2-pyridylazo)-5-(diethylamino)phenol

1987 ◽  
Vol 52 (4) ◽  
pp. 878-912 ◽  
Author(s):  
Marie Langová ◽  
Zdeněk Šimek ◽  
Jitka Chromá ◽  
Lumír Sommer
Keyword(s):  
Drinking Water ◽  
Spectrophotometric Study ◽  
Brij 35 ◽  
Complexation Equilibria ◽  
Determination Of Nickel ◽  
Absorbance Data

The complexation equilibria of Ni(II) with 4-(2-pyridylazo)resorcinol (PAR) and 4-(2-thiazolylazo)resorcinol (TAR) in 30 vol.% ethanol and with 2-(5-bromo-2-pyridylazo)-5-(diethylamino)phenol (BrPADAP) in 10 vol.% ethanol containing 0·1% BRIJ-35 tenside were studied spectrophotometrically. The absorbance data were processed by the SPEFO 8, HALTAFALL SPEFO and SQUAD-G programs. The working procedures for the determination of Ni(II) with the reagents in pure solutions were optimized and statistically evaluated, and PAR was applied to the determination of Ni(II) in drinking water.

Simultaneous Spectrophotometric Determination of Salbutamol by Coupling with Diazotized 4-Aminobenzoic acid

2017 ◽  
Vol 8 (1) ◽  
Author(s):  
Hind Hadi ◽  
Gufran Salim
Keyword(s):  
Pharmaceutical Preparations ◽  
Coupling Reaction ◽  
Dosage Forms ◽  
Water Soluble ◽  
Trace Determination ◽  
Aminobenzoic Acid ◽  
Optimum Conditions ◽  
Colored Product ◽  
Versus Concentration

A simple, rapid and sensitive spectrophotmetric method for trace determination of salbutamol (SAL) in aqueous solution and in pharmaceutical preparations is described. The method is based on the diazotization coupling reaction of the intended compound with 4-amino benzoic acid (ABA) in alkaline medium to form an intense orange, water soluble dye that is stable and shows maximum absorption at 410 nm. A graph of absorbance versus concentration indicates that Beer’s law is obeyed over the concentration range of 0.5-30 ppm, with a molar absorbtivity 3.76×104 L.mol-1 .cm-1 depending on the concentration of SAL. The optimum conditions and stability of the colored product have been investigated and the method was applied successfully to the determination of SAL in dosage forms.

Colorimetric Determination of Amoxicillin in Pure and some Pharmaceutical Formulations Via Reaction with Potassium Permanganate as Oxidant Reagent

2019 ◽  
Vol 10 (02) ◽  
Author(s):  
Abbas Shebeeb Al-kadumi ◽  
Sahar Rihan Fadhel ◽  
Mohammed Abdullah Ahmed ◽  
Luma Amer Musa
Keyword(s):  
Potassium Permanganate ◽  
Pharmaceutical Preparations ◽  
Pharmaceutical Formulations ◽  
Atomic Emission ◽  
Basic Medium ◽  
Photometric Method ◽  
Colorimetric Determination ◽  
Spectrophotometric Methods ◽  
Label Claim

We proposed two simple, rapid, and convenient spectrophotometric methods are described for the determination of Amoxicillin in bulk and its pharmaceutical preparations. They are based on the measurement of the flame atomic emission of potassium ion (in first method) and colorimetric determination of the green colored solution for manganite ion at 610 nm formed after reaction of Amoxicillin with potassium permanganate as oxidant agent (in the second method) in basic medium. The working conditions of the methods were investigated and optimized. Beer's law plot showed a good correlation in the concentration range of 5-45 μg/ml. The detection limits and relative standared deviations were (2.573, 2.814 μg/ml) (2.137, 2.498) for the flame emission photometric method and (1.844, 2.016 μg/ml) (1.645,1.932) for colorimetric methods for capsules and suspensions respectively. The methods were successfully applied to the determination of Amoxicillin in capsules and suspensions, and the obtained results were in good agreement with the label claim. No interference was observed from the commonly encountered additives and expectancies.

Sign in / Sign up

Export Citation Format

Share Document