Zevin, Michael and Reisfeld, Renata and Oehme, Ines and Wolfbeis, Otto S. (1997) Sol-gel-derived optical coatings for determination of chromate. Sensors and Actuators B Chemical 39 (1-3), pp. 235-238.
Download (490kB) - Repository staff only
An optical probe for chromate ion has been obtained by the sol-gel technique by depositing a porous film containing the reagent diphenylcarbazide on a glass support. Changes in the absorption of light as a result of the (irreversible) formation of a purple product between chromate and the reagent inside the sol-gel are monitored. The detection limit for chromate anion is as low as 1 ppb, but only after rather long exposure to samples. The morphology of the surface of the film has been studied using atomic force microscopy and is related to the technique of preparing the film.
|Institutions:||Chemistry and Pharmacy > Institut für Analytische Chemie, Chemo- und Biosensorik > Chemo- und Biosensorik (Prof. Otto S. Wolfbeis)|
|Keywords:||Chromate sensors; Optical coatings; Sol-gel technique|
|Subjects:||500 Science > 540 Chemistry & allied sciences|
|Created at the University of Regensburg:||Unknown|
|Deposited On:||20 May 2011 06:31|
|Last Modified:||13 Mar 2014 17:22|