ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Extractive-photometric determination of microquantities of cerium in some metallic materials

A. Košturiak

Department of Experimental Physics, Faculty of Natural Sciences, P. J. Šafárik University, CS-041 54 Košice

Abstract: The described colour reaction of Ce(III) with arzenazo III in glycine buffer solutions of pH = 2.5—pH = 3.1 depending on composition of the analyzed material is used to sensitive photometric determination of Ce(III) even in multicomponent systems such as crude iron and different kinds of steel. This reaction is usually combined with extraction, screening or electrolytic separation of excess interfering ions as well as with extraction of the determined cerium in the form of the Ce(III)—phenylacetic acid complex from urotropine buffer solution (pH = 8—pH = 9) into n-butyl alcohol. These procedures are followed by reextraction and analytical determination. The obtained results have been evaluated by different mathematical-statistical methods and confronted with the relations which allow simultaneous estimation of precision and accuracy of the results of analyses and are convenient for estimation of the width of tolerance corridor depending on concentration of the analyzed sample even if the measurements are not many times repeated.

Full paper in Portable Document Format: 391a103.pdf

Chemical Papers 39 (1) 103–113 (1985)