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- W1985457583 abstract "A flow injection analysis (FIA) procedure for the determination of free chlorine in industrial formulations and water samples is proposed. The manifold is provided with a gas-diffusion unit which permits the removal of interfering species and also the preconcentration of chlorine. The determination of chlorine is performed on the basis of the oxidation by o-dianisidine as a chromogenic reagent to a coloured product which can be monitored at 445 nm. The method (for a preconcentration step of 60 s) is linear over the range 0.04–1.00 mg l−1 of chlorine, the limit of detection is 0.04 mg l−1, the reproducibility of the procedure (as RSD of the slope) is 3.7% for a series of four independent calibrations, the precision (as RSD of a series of 30 continuous FIA peaks of 0.56 mg l−1 of chlorine) is 1.4% and the sample throughput is 40 h−1. A detailed comparative study of the analytical characteristics of a single mono-channel reverse FIA assembly and the same system but provided with a Fluoropore membrane filter of 0.5 μm pore size was performed to check the advantages of the new approach in terms of sensitivity, selectivity and limit of detection." @default.
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- W1985457583 date "2001-10-26" @default.
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- W1985457583 title "o-Dianisidine: a new reagent for selective spectrophotometric, flow injection determination of chlorine" @default.
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- W1985457583 doi "https://doi.org/10.1039/b107000m" @default.
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