FIBEROPTIC SENSOR FOR THE DETERMINATION OF CARBOXYLIC-ACIDS BASED ON FLUORESCENCE ENHANCEMENT OF LIPOPHILIZED FLUORESCEIN ISOLOGS

Authors
ZENG HH WANG KM YANG XH YU RQ
Citation
Hh. Zeng et al., FIBEROPTIC SENSOR FOR THE DETERMINATION OF CARBOXYLIC-ACIDS BASED ON FLUORESCENCE ENHANCEMENT OF LIPOPHILIZED FLUORESCEIN ISOLOGS, Analytica chimica acta, 287(3), 1994, pp. 267-273
Citations number
22
Categorie Soggetti
Chemistry Analytical
Journal title
Analytica chimica acta → ACNP
ISSN journal
00032670
Volume
287
Issue
3
Year of publication
1994
Pages
267 - 273
Database
ISI
SICI code
0003-2670(1994)287:3<267:FSFTDO>2.0.ZU;2-F
Abstract
A fibre-optic sensor for the determination of carboxylic acids based o n fluorescence enhancement of lipophilized fluorescein isologues disso lved in a plasticized poly(vinyl chloride) membrane was developed. Wit h the optimum conditions described, carboxylic acids in sample solutio ns from 1 to 9 M (formic acid), 0.5 to 10 M (acetic acid), 0.1 to 2.7 M (propionic acid) and 1 x 10(-4) to 1 X 10(-2) M (benzoic acid) can b e determined. The response times of the sensor to carboxylic acid are less than 1.5 min. In addition to high reproducibility of the fluoresc ence signal, the sensor exhibits fair selectivity for carboxylic acids .