Estimation du diamètre des micelles d'une suspension colloïdale de sélénium par spectrophotométrie

Abstract

Estimatioii c h i diarn6trc cles micellps d 'une suspension rolloitlale de s C 1 C n i u m par spectrophoto-P K1611aiclPar A. WATILLON e t F. VAN GRUNDERBEECK (*) (Bruxelles) S u n MARYIn a preceding paper, we proposed a counting method permitting the precise determination of particle sizes in lyophobic colloids. Results obtained by this method in the case of Selenium hydrosols were controlled by electron-microscopy. The latter technique was also used in verifying isodispersity of the suspensions.In the present paper, we propose a simple spectrophotornetric method calibrated by above mentioned absolute techniquesfor discriminating between isodispersed and poly dispersed Selenium Sols and for rapid estiniation of the average siLe of the Seleniniurn particles.