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RESEARCH PRODUCT
A tandem-flow assembly for the chemiluminometric determination of hydroquinone
B. Gómez-taylor CorominasM. Catalá IcardoL. Lahuerta ZamoraJ. Martínez CalatayudJ. V. García Mateosubject
Detection limitChemiluminescenceChromatographyHydroquinoneHydroquinonePermanganateAnalytical chemistrySulfuric acidAnalytical Chemistrylaw.inventionchemistry.chemical_compoundBenzalkonium chloridePotassium permanganatechemistryEnvironmental sampleslawTandem-flowQUIMICA ANALITICAmedicinePharmaceuticalsLight emissionChemiluminescencemedicine.drugdescription
A direct chemiluminescent procedure for determination of hydroquinone based on the emergent flow methodology known as multicommutation or tandem-flow is presented for first time. The manifold was based on a set of three channels and three solenoid valves; and, the determination was performed at 60degreesC and at flow-rate of 7.5 ml min(-1). The complete cycle lasted 35 s, which resulted in a sample flow trough of 103 h(-1). The chemical process was the hydroquinone oxidation with the system sulphuric acid-potassium permanganate; and the light emission was clearly enhanced by the presence of quinine sulphate and benzalkonium chloride reaching a detection limit of 30 Rg l(-1). The dynamic interval was over the range 0.1-15.0 mgl(-1) and a large list of interferents were assayed; the chemical robustness was also tested. The method was applied to different type of samples: namely, pharmaceutical formulations, a photographic solution and irrigation and residual superficial waters. (C) 2004 Elsevier B.V. All rights reserved.
| year | journal | country | edition | language |
|---|---|---|---|---|
| 2003-12-15 | Talanta |