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Fluorescent pH sensors with negligible sensitivity to ionic strength

Weidgans, Bernhard M., Krause, Christian, Klimant, Ingo and Wolfbeis, Otto S. (2004) Fluorescent pH sensors with negligible sensitivity to ionic strength. The analyst 129 (7), pp. 645-650.

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Date of publication of this fulltext: 15 Apr 2011 08:40

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Optical pH determination has the fundamental disadvantage of measuring a signal that depends on the ionic strength of the sample. The problem originates from the complex relationship between the proton activity and the concentration of the pH-sensitive dye. The effect of ionic strength on the signal depends on the charge of the indicator and its environment, e.g. the immobilisation matrix. We ...


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Item type:Article
Institutions:Chemistry and Pharmacy > Institut für Analytische Chemie, Chemo- und Biosensorik > Chemo- und Biosensorik (Prof. Antje J. Bäumner, formerly Prof. Wolfbeis)
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Dewey Decimal Classification:500 Science > 540 Chemistry & allied sciences
Created at the University of Regensburg:Unknown
Item ID:20387
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