Title :
Fiber-optic calcium ion sensor using hydrophobic fluorescent probe
Author :
Wakida, S. ; Kawabata, Y. ; Imasaka, T. ; Higashi, K. ; Ishibashi, N.
Author_Institution :
Dept. of Mater. Chem., Gov. Ind. Res. Inst., Osaka, Japan
Abstract :
A novel fiber-optic calcium ion sensor based on a calcium-sensing plasticized poly(vinyl chloride) membrane with a neutral carrier and a hydrophobic fluorescent probe (hexadecyl-acridine orange) was prepared. The fiber-optic Ca/sup 2+/ sensor showed a reversible response within 30 s (99% response) and a linear response between the fluorescent intensity of the sensor output and the logarithm of the Ca/sup 2+/ activity from 10/sup -6.5/ to 10/sup -3/ M. The optical selectivity of the prepared fiber-optic Ca/sup 2+/ sensor was almost the same as that of the conventional potentiometric Ca/sup 2+/ sensors.<>
Keywords :
calcium; chemical variables measurement; fibre optic sensors; fluorescence; membranes; polymer films; 30 s; Ca; chemical sensor; fiber-optic Ca/sup 2+/ sensor; hexadecyl-acridine orange; hydrophobic fluorescent probe; ion selective membrane; neutral carrier; optical selectivity; plasticized poly(vinyl chloride) membrane; potentiometric sensor; reversible response; Biomembranes; Calcium; Chemical sensors; Fiber lasers; Fluorescence; Optical fiber devices; Optical fiber sensors; Optical sensors; Probes; Sensor phenomena and characterization;
Conference_Titel :
Solid-State Sensors and Actuators, 1991. Digest of Technical Papers, TRANSDUCERS '91., 1991 International Conference on
Conference_Location :
San Francisco, CA, USA
Print_ISBN :
0-87942-585-7
DOI :
10.1109/SENSOR.1991.148890
