FLOW-INJECTION SYSTEMS FOR DETERMINING IRON(III) AND IODIDE WITH THE USE OF CATALYTIC REACTIONS

Flow-injection systems with spectrophotometric detection were develope d on the basic of catalytic reactions, namely, the Fe(III)-catalyzed o xidation of methanol with hydrogen peroxide and the iodide-catalyzed c erium-arsenite reaction. The developed systems were used to analyze in dustrial and natural waters. The detection limits attained were as low as 0.02 mu g/mL of Fe(III) and 0.2 mu g/mL of I- at relative standard deviations of 2-7% with the throughoutput of 35 and 25 h(-1), respect ively.