%0 Journal Article %T Catalytic Spectrophotometric Determination of Traces of Tellurium (IV) %J Iranian Journal of Chemistry and Chemical Engineering %I Iranian Institute of Research and Development in Chemical Industries (IRDCI)-ACECR %Z 1021-9986 %A Shamsipur, Mojtaba %A Mousavi, Mir Fazlollah %D 1995 %\ 03/01/1995 %V 14 %N 1 %P 1-5 %! Catalytic Spectrophotometric Determination of Traces of Tellurium (IV) %K Tellurium (IV) %K Determination %K Catalytic effect %K Toluidine blue %K Spectrophotometry %R 10.30492/ijcce.1995.10160 %X A Simple, rapid and sensitive method has been developed for determination of trances of tellurium (VI) (0.096-1.250 mg/mL) based on its catalytic effect on the reduction reaction of toluidine blue by sulfide ion at pH 4. The reaction is monitored spectrophotometrically by measuring the decrease in absorbance of the dyestuff at 628 nm by the fixed time method. The detection limit is 80 ng/mL and the relative standard deviation for 1 mg/mL tellurium is 2.2%. %U https://ijcce.ac.ir/article_10160_9ed3f6bfde4732ac69e1e0a3dd5519e8.pdf