New Fluorescent Optical pH Sensors with Minimal Effects of Ionic Strength
Theory, Syntheses & Application
(Sprache: Englisch)
There is still a lack of commercial applications of pH sensors due to the decisive disadvantage that the signal is depending on the ionic strength of the sample. pH is defined as the negative logarithm of the activity of protons in aqueous solution, while...
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There is still a lack of commercial applications of pH sensors due to the decisive disadvantage that the signal is depending on the ionic strength of the sample. pH is defined as the negative logarithm of the activity of protons in aqueous solution, while the optical parameter (e.g. change of absorption or fluorescence) correlates with the concentration of the pH-sensitive dye. The cross-sensitivity of the calibration curve towards ionic strength can cause pH errors of up to 1.5 pH units. Since the electrolyte concentration, respectively the ionic strength, is not constant in most real samples, optical pH sensors have not often been applied in these systems. In systems with constant ionic strength (e.g. blood, sea water) pH was successfully determined via optical sensors. Therefore, there is a need for optical sensors displaying a comparably negligible effect of ionic strength on the measured signal. This work describes the fabrication and application of fluorescent pH sensors with special attention to minimize of the effect of ionic strength on the sensor. The book is written for students, scientists and people interested in the problems of measuring pH with optical sensors.
Autoren-Porträt von Bernhard Weidgans
Born 1976 in Passau, Bernhard Weidgans started to study chemistry in 1995 in Regensburg. His diploma work in 2001 described the syntheses of fluorescent markers for bioanalytical applications. In his PhD thesis, he worked on the optimization of optical pH sensors. Since 2004 Bernhard Weidgans is process engineer for Infineon in Regensburg.
Bibliographische Angaben
- Autor: Bernhard Weidgans
- 144 Seiten, Maße: 15 x 21,8 cm, Kartoniert (TB), Englisch
- Verlag: VDM Verlag Dr. Müller
- ISBN-10: 3836491427
- ISBN-13: 9783836491426
- Erscheinungsdatum: 13.11.2013
Sprache:
Englisch
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