9 March 1993 Photometric sensors based on sol-gel porous glass doped with organic reagents
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A new class of sensitive disposable sensors for determination of trace concentrations of water pollutants has been developed. It utilizes porous transparent silica glasses doped with organic photometric reagents. The silica sensors are produced at room temperature by the sol-gel procedure, i.e. by hydrolysis followed by polycondensation of tetraalkoxysilanes. Thus, we produced porous glasses doped with organic photometric reagents for the determination of typical cations, anions, pH, oxidation agents (e.g. disinfection agents) as well as typical air pollutants. A mathematical model for a flat plate monolithic iron sensor was developed and the predicted calibration curves were compared with the experimental response.
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Ovadia Lev, B. I. Kuyavskaya, Y. Sacharov, Claudio Rottman, A. Kuselman, David Avnir, M. Ottolenghi, "Photometric sensors based on sol-gel porous glass doped with organic reagents", Proc. SPIE 1716, International Conference on Monitoring of Toxic Chemicals and Biomarkers, (9 March 1993); doi: 10.1117/12.140289; https://doi.org/10.1117/12.140289

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