3376

3101

كارشناسي ارشد

شيمي تجزيه

اصفهان: دانشگاه صنعتي اصفهان. دانشكده شيمي

1385

دوازده، [69]، [II]ص.:مصور، جدول، نمودار

ص. ع. به فارسي و انگليسي

بهزاد رضايي

علي اصغر انصافي

مرتضي طالبي، تقي خياميان

شيمي

ID3101

به فارسي و انگليسي قابل رؤيت در نسخه ديجيتال

Abstract A simple sensitive and selective method has been proposed for spectrophotometricdetermination of ultra trace amounts of ruthenium based on its catalytic effect on theoxidation of pyronin B by periodate at max 555 nm The described method is able toquantitize ruthenium in the range of 0 1 100 ng ml 1 r 0 9973 with a detection limit0 036 ng ml 1 Under optimum conditions this procedure has been successfully applied todetermine the trace levels of ruthenium in the environmental and biological samples Theprecision expressed as relative standard deviation of three measurements is better than2 24 In part two a rapid and sensitive flow injection catalytic method was presented fordetermination of ruthenium based on its catalytic effect on the oxidation of pyronin B byperiodate in pH 1 0 The reaction rate is controlled specrophotometricaly by monitoringthe dye absorbance at 555 nm The optimized conditions make it possible to determineruthenium in the ranges of 0 1 10 0ng mL 1 r2 0 9982 and 10 0 50 0 ng mL 1 r2 0 9934 with a detection limit of 0 04 ng mL 1and a sample rate of 30 5 samples h Relative standard deviation for the results of five replicate measurements does not exceed1 44 The proposed method has been successfully applied for quantitation of ultra traceamounts of ruthenium in some environmental and biological samples

بهزاد رضايي

علي اصغر انصافي

مرتضي طالبي، تقي خياميان