m-Aminophenylarsonic Acid as a Reagent for the Extraction Preconcentration of Phenol |
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| Authors: | Yu M Evtushenko V M Ivanov B E Zaitsev |
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| Institution: | (1) AOZT Elektroizolit, Khot'kovo, Sergiev-Posad, Moscow oblast, 143350, Russia;(2) Department of Chemistry, Moscow State University, Vorob'evy gory, Moscow, 119899, Russia;(3) Peoples Friendship University, ul. Ordzhonikidze 3, Moscow, 119517, Russia |
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| Abstract: | The azocoupling reaction of phenol with the diazonium salt of m-aminophenylarsonic acid was used for the determination of phenol in water at a level of maximum permissible concentrations. The resulting compound is stable in a wide pH range, which made it possible to develop a procedure for the determination of phenol with the preconcentration of the azo compound by extraction to isobutanol at pH 2 and subsequent back extraction to the aqueous phase at pH  10. The high concentration coefficient of phenol (65) provides for determination of phenol down to 0.9  g/L. |
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