Development of a one-shot optical citrate sensor based on a guanidinium synthetic receptor
Microchimica Acta, ISSN: 0026-3672, Vol: 151, Issue: 1-2, Page: 93-100
2005
- 22Citations
- 13Captures
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Article Description
A new optical absorption-based one-shot sensor for the determination of citrate is described. The citrate-sensitive element is a plasticized polymeric membrane containing a synthetic guanidinium receptor and a pH-sensitive lipophilic dye. The rigid amide-based receptor with C symmetry controls the anion selectivity pattern of the optical element. The optical selectivity coefficients obtained for citrate over a variety of common carboxylate anions meet the requirements for the determination of citrate in different types of samples. The one-shot sensor responds rapidly - in 40 s - and reversibly to citrate over a dynamic range of 0.779 to 25.0 mM with a sensor-to-sensor reproducibility of 5.7%, as log a, in the medium level of the range. The performance of the optical one-shot sensor has been tested in the analysis of citrate in soft drinks and pharmaceuticals, validating the results against a reference procedure. The proposed method is quick, inexpensive, selective and sensitive, and uses conventional instrumentation only. © Springer-Verlag 2005.
Bibliographic Details
http://www.scopus.com/inward/record.url?partnerID=HzOxMe3b&scp=24644464126&origin=inward; http://dx.doi.org/10.1007/s00604-005-0378-8; http://link.springer.com/10.1007/s00604-005-0378-8; http://link.springer.com/content/pdf/10.1007/s00604-005-0378-8; http://link.springer.com/content/pdf/10.1007/s00604-005-0378-8.pdf; http://link.springer.com/article/10.1007/s00604-005-0378-8/fulltext.html; https://dx.doi.org/10.1007/s00604-005-0378-8; https://link.springer.com/article/10.1007/s00604-005-0378-8; http://www.springerlink.com/index/10.1007/s00604-005-0378-8; http://www.springerlink.com/index/pdf/10.1007/s00604-005-0378-8
Springer Science and Business Media LLC
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