Characterization of a fluorescent sol–gel encapsulated erythrosin B dissolved oxygen sensor

A thin film dissolved oxygen sensor was fabricated by trapping erythrosin B in a sol–gel matrix. No phosphorescence was observed when the sensor was immersed in water. Very weak phosphorescence was observed when erythrosin B was dissolved in aqueous ethanol and acetone solutions. However, fluorescen...

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Bibliographic Details
Published in:Analytica chimica acta 2003-07, Vol.487 (1), p.101-108
Main Authors: Bailey, R.T, Cruickshank, F.R, Deans, G, Gillanders, R.N, Tedford, M.C
Format: Article
Language:English
Subjects:
Analytical chemistry
Chemistry
Dissolved oxygen
Erythrosin B
Exact sciences and technology
Fluorescence
General, instrumentation
Sensor
Sol–gel
Spectrometric and optical methods
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Summary:A thin film dissolved oxygen sensor was fabricated by trapping erythrosin B in a sol–gel matrix. No phosphorescence was observed when the sensor was immersed in water. Very weak phosphorescence was observed when erythrosin B was dissolved in aqueous ethanol and acetone solutions. However, fluorescence at 590 nm, which was efficiently quenched by dissolved oxygen, was observed from the doped sol–gel sensor in water. A singlet oxygen feedback mechanism was proposed. Good sensitivity and stability were observed for this detector.
ISSN:0003-2670
1873-4324
DOI:10.1016/S0003-2670(03)00507-5