Show simple item record

dc.contributor.authorWygladacz, K.
dc.contributor.authorQin, Y.
dc.contributor.authorWroblewski, W.
dc.contributor.authorBakker, Eric
dc.identifier.citationWygladacz, Katarzyna and Qin, Yu and Wroblewski, Wojciech and Bakker, Eric. 2008. Phosphate-selective fluorescent sensing microspheres based on uranyl salophene ionophores. Analytica Chimica Acta. 614 (1): 77-84.

Optical dihydrogen phosphate-selective sensors that function on the basis of bulk optode principles and are based on two different uranyl salophene ionophores are reported here for the first time. The influence of the optode composition and measuring conditions such as sample pH on the optode response are characterized, along with sensor selectivity and long-term stability. Three plasticizers of different polarity are considered for optode fabrication: bis(2-ethylhexyl)sebacate (DOS), dodecyl 2-nitrophenyl ether (o-NPDDE), o-nitrophenyloctylether (o-NPOE). The compounds 9-(diethylamino)-5-(octadecanoylimino)-5H-benzo[a]phenoxazine (ETH 5294, chromoionophore I) and 9-(diethylamino)-5-[(2-octyldecyl)imino]benzo[a]phenoxazine (ETH 5350, chromoionophore III) are used as H+-selective fluoroionophores that also act as reference ionophores. The resulting optode-based sensors are compared with their ion-selective electrode (ISE) counterparts, and it is revealed that optodes are better suited for operation at physiological pH. The best optode performance was found for the two component optode sensors doped with ETH 5350 and phosphate ionophore(I). The linear range of these sensor was log a = −6.0 to −2.6. Dihydrogen phosphate-selective optode sensors of optimized composition are fabricated in microsphere format and preliminary measurements in diluted sheep blood samples are presented.

dc.publisherElsevier BV
dc.subjectphosphate sensor
dc.subjecturanyl salophene
dc.subjectmicrosphere sensors
dc.subjectoptical sensors
dc.titlePhosphate-selective fluorescent sensing microspheres based on uranyl salophene ionophores
dc.typeJournal Article
dcterms.source.titleAnalytica Chimica Acta

NOTICE: This is the author’s version of a work that was accepted for publication in Analytica Chimica Acta. Changes resulting from the publishing process, such as peer review, editing, corrections, structural formatting, and other quality control mechanisms may not be reflected in this document. Changes may have been made to this work since it was submitted for publication. A definitive version was subsequently published in Analytica Chimica Acta, Vol. 614, Issue 1, (2008). doi:


Copyright 2008 Elsevier B.V. All rights reserved

curtin.departmentNanochemistry Research Institute (Research Institute)
curtin.accessStatusOpen access
curtin.facultyNanochemistry Research Centre

Files in this item


This item appears in the following Collection(s)

Show simple item record