Spectrophotometric determination of stimulant drugs in urine by color reaction with tetrabromophenolphthalein ethyl ester.
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منابع مشابه
Simultaneous spectrophotometric analysis of aliphatic amines utilizing thermochromism of charge-transfer complexes with tetrabromophenolphthalein ethyl ester.
Aliphatic amines, such as n-hexylamine (primary), di-n-hexylamine (secondary) and tri-n-hexylamine (tertiary amine), react with tetrabromophenolphthalein ethyl ester molecules (TBPEH) to form reddish or red-violet charge-transfer complexes (CT complexes) in 1,2-dichloroethane (DCE). The absorption maxima of the CT complexes with all primary amines occur at around 560 nm, with secondary amines a...
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An acid dissociation constant of tetrabromophenolphthalein ethyl ester (TBPE) was determined through the measurement of electrophoretic mobility by capillary zone electrophoresis (CZE). Although TBPE is degradable in acidic pH region and it gradually degraded at pH conditions around and below its pKa values in the time scale of the CZE measurement, equilibrium species of interest were detected ...
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Solvent extraction–spectrophotometries based on ion association formation have been established for the improvement of the sensitivity for the determination of ionic compounds such as anionic and cationic surfactants using hydrophobic dye ions. For example, anionic surfactants were determined using Methylene Blue,1 Ethyl Violet,2 Co(III)-5-Cl-PADAP3 and Malachite Green.4 Bromocresol Green,5 2,6...
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An optode method for the determination of sulfate ion was developed. The optode membrane is 2-nitrophenyl octyl ether-plasticized poly(vinyl chloride) membrane containing tetrabromophenolphthalein ethyl ester. The method is based on formation of an ion associate between the excess of 2-aminoperimidine hydrobromide (Ap) and sulfate ion in the sample solution, and detection of the concentration o...
متن کاملSpectrophotometric determination of drugs using
Seven drugs viz., Paroxetine, Famotidine, Quetiapine, Dextromethorphan, Levofloaxacin, Irbesartan and Itraconazole were tested for the formation of charge transfer complexes with DDQ and the interaction formed a basis for spectrophotometric determination of the drugs. Acetonitrile was found to be suitable solvent for the analysis. The methods have been validated in terms of ICH guidelines The c...
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ژورنال
عنوان ژورنال: Analytical Sciences
سال: 1986
ISSN: 0910-6340,1348-2246
DOI: 10.2116/analsci.2.275