Flame photometric determination of bromine in organic compounds by band spectra of cuprous bromide

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The determination of bromine in organic compounds by flame photometry was attempted by using as a solvent dimethylformamide: acetone mixture (1∶1) containing copper and a cuprous bromide band peak of 434.1 nm. In order to obtain a stable and intense cuprous bromide spectrum, combustion gases were maintained at high oxygen pressure (0.70 kg/cm2) and low hydrogen flow rate (800ml/min). p-Dibromobenzene was used as the standard bromine compound and determination was carried out with 14 types of organic bromine compounds with good results (93.0–106.4% recovery). The determinable concentration range of bromine is 0.025–0.2 mol.

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