Complexation equilibria and spectrophotometric determination of iron(III) with resorcylic acid.

Complexation equilibria and spectrophotometric determination of iron(III) with resorcylic acid. Research Abstract Details 

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Complexation equilibria and spectrophotometric determination of iron(III) with resorcylic acid. Abstract Text:

The complexation equilibria of Fe(III) with resorcylic acid (2,4-dihydroxybenzoic acid, DHB) were studied spectrophotometrically in ethanol-water (4 + 6, v/v) at an ionic strength of 0.1 M NaClO4. The complexation reactions were demonstrated and characterized. A simple, rapid, and sensitive method based on the formation of the Fe(III)-DHB complex at pH 2.5 (lambdamax = 520 nm, epsilon = 0.8 x 10(4) L/mol x cm) was developed for the spectrophotometric determination of Fe(III). The effect of diverse ions on the sensitivity of the proposed method was studied. The Fe-DHB complex was isolated and characterized by both elemental analysis and infrared spectroscopy. The thermal behavior of the complex in dynamic nitrogen gas was studied by thermogravimetric and differential thermogravimetric analysis. Thermal events encountered throughout the course of decomposition were monitored. A computer program was used for regression analysis and for determination of kinetic and thermodynamic parameters from experimental nonisothermal thermogravimetric data. The proposed method was tested by determinations of iron in various synthetic samples and Portland cement materials.

Complexation equilibria and spectrophotometric determination of iron(III) with resorcylic acid. Publishing Authors By Initials

For similar investigative techniques: chemistry, analytical: thermogravimetry research abstracts see: investigative techniques: chemistry, analytical: thermogravimetry research

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Complexation equilibria and spectrophotometric determination of iron(III) with resorcylic acid. Journal Published:

PUBLICATION TYPE: Journal Article

Journal: Journal of AOAC International

VOLUME: 84

Page Numbers: 537-45

Journal Abbreviation: J AOAC Int

ISSN: 1060-3271

DAY: 17

MONTH: 03

YEAR: 2008

Complexation equilibria and spectrophotometric determination of iron(III) with resorcylic acid. Information

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LANGUAGE: eng

NlmUniqueID: 9215446

Complexation equilibria and spectrophotometric determination of iron(III) with resorcylic acid. Keywords Mesh Terms:

KEYWORDS: Thermogravimetry

MESH TERMS: analysis

Chemical & Substance for Abstract: Complexation equilibria and spectrophotometric determination of iron(III) with resorcylic acid. Information

Substance Name: beta-resorcylic acid

Registry Number: 89-86-1

Grant and Affiliation Information for Complexation equilibria and spectrophotometric determination of iron(III) with resorcylic acid.

AFFILIATION: Assiut University, Faculty of Science, Chemistry Department, Egypt.

Country: United States

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MEDLINETA: J AOAC Int

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