Determination of Iodide Based on Its Inhibition Effect on the Catalytic Oxidation of Meta Cresol Purple by Periodate

A new simple (lIld inexpenrive kinetic spectrophotometric method was proposed/01 determining traceiodide in the presenceiflarge amounts qjʹbromide andchloride ions. The methodif baredon the inhibitory&lxt 0/ iodide 011 the bromide catalyzed oXidation ifmeta creJʹ01 pillple (MCp) with per/odate illhydrochloric aCid media. 77te reacr/on was monitored by measuring tlte decreare ill abJʹorballce q!ʹmetacre.rolpurple atAHltl(=52.f nm. Onder optimum com/itioM. iomde call be de/ermined ill the range if(J. 10-2..,Jig mil with a detection binitif0.060Jig mil. The relative.rtandarddeviations./Orten repUcate delelminotion(!jʹ()5 and10Jig mil iodide are 2.1 % a?ldI. 7%, rerpedive(J: The appkcation qlthemethodto the ana(;~fififwater sal!1jJles (lap andriver water)gaveaccurateresults ba.red011 recoverrsrsd/e» (93-10