engleski

Application of a Novel Lipophilized Derivative of Rhodamine 19 in an Optical Sensor Suitable for Measurements of pH in Alkaline Region

An optical pH sensor based on the fluorescence of a new lipophilic rhodamine dye immobilized in a thin poly(vinyl chloride) membrane was developed. A response to hydrogen ions was a result of reversible changes in the molecular structure of rhodamine. Excited at 528 nm the membrane fluoresced at 547 nm. The sensor system showed a usable sensitivity over the 9.5-11.9 pH range and very good reproducibility.

rhodamine 19 octadecylamide; fluorescence; optical sensor; pH determination.

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