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- W1578633171 abstract "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 60 °C 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 μg l−1. The dynamic interval was over the range 0.1–15.0 mg l−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." @default.
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- W1578633171 date "2004-10-01" @default.
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- W1578633171 title "A tandem-flow assembly for the chemiluminometric determination of hydroquinone" @default.
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- W1578633171 doi "https://doi.org/10.1016/j.talanta.2004.03.031" @default.
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