Sol-gel-derived optical coatings for determination of chromate

Michael Zevin; Renata Reisfeld; Ines Oehme; Otto S. Wolfbeis

doi:10.1016/S0925-4005(97)80210-9

Sol-gel-derived optical coatings for determination of chromate

Michael Zevin, Renata Reisfeld^*, Ines Oehme, Otto S. Wolfbeis

^*Corresponding author for this work

Institute of Chemistry

Research output: Contribution to journal › Article › peer-review

32 Scopus citations

Abstract

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.

Original language	English
Pages (from-to)	235-238
Number of pages	4
Journal	Sensors and Actuators, B: Chemical
Volume	39
Issue number	1-3
DOIs	https://doi.org/10.1016/S0925-4005(97)80210-9
State	Published - 1997

Keywords

Chromate sensors
Optical coatings
Sol-gel technique

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10.1016/S0925-4005(97)80210-9

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abstract = "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.",

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AU - Reisfeld, Renata

AU - Oehme, Ines

AU - Wolfbeis, Otto S.

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AB - 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.

KW - Chromate sensors

KW - Optical coatings

KW - Sol-gel technique

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Sol-gel-derived optical coatings for determination of chromate

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Keywords

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