Sensors 2006, 6(10), 1224-1233; doi:10.3390/s6101224
Article

Flow-through Bulk Optode for Spectrophotometric Determination of Thiocyanate and Its Application to Water and Saliva Analysis

Soledad García Mªemail, Joaquín A. Ortuñoemail, Concepción Sánchez-Pedreño* email, Isabel Albero Mªemail and José Fernández Mª
Department of Analytical Chemistry, Faculty of Chemistry, University of Murcia, 30071 Murcia, Spain
* Author to whom correspondence should be addressed.
Received: 23 June 2006 / Accepted: 3 October 2006 / Published: 9 October 2006
(This article belongs to the Special Issue Sensors in Flow Analysis)
PDF Full-text Download PDF Full-Text [144 KB, uploaded 20 June 2008 16:51 CEST]
Abstract: A flow-through spectrophotometric bulk optode for the flow-injectiondetermination of thiocyanate is described. As active constituents, the optode incorporatesthe lipophilized pH indicator 5-octadecanoyloxy-2-(4-nitrophenylazo)phenol andmethyltridodecyl ammonium chloride, dissolved in a plasticized poly(vinyl)chloridemembrane entrapped in a cellulose support. The optode is applied, in conjunction with theflow injection technique, to the determination of thiocyanate at pH 7.5 (TRIS/H2SO4). Thesensor is readily regenerated with a 10-2 M NaOH carrier solution. The analyticalcharacteristics of this optode with respect to thiocyanate response time, dynamicmeasurement range, reproducibility and selectivity are discussed. The proposed FI methodis applied to the determination of thiocyanate in waters from different sources and in humansaliva samples in order to distinguish between smokers and non-smokers.
Keywords: Flow-through optode; spectrophotometry; thiocyanate; water; saliva.

Article Statistics

Click here to load and display the download statistics.

Cite This Article

MDPI and ACS Style

García, S., Mª; Ortuño, J.A.; Sánchez-Pedreño, C.; Albero, I., Mª; Fernández, J., Mª Flow-through Bulk Optode for Spectrophotometric Determination of Thiocyanate and Its Application to Water and Saliva Analysis. Sensors 2006, 6, 1224-1233.

AMA Style

García S, Mª, Ortuño JA, Sánchez-Pedreño C, Albero I, Mª, Fernández J, Mª. Flow-through Bulk Optode for Spectrophotometric Determination of Thiocyanate and Its Application to Water and Saliva Analysis. Sensors. 2006; 6(10):1224-1233.

Chicago/Turabian Style

García, Soledad, Mª; Ortuño, Joaquín A.; Sánchez-Pedreño, Concepción; Albero, Isabel, Mª; Fernández, José, Mª. 2006. "Flow-through Bulk Optode for Spectrophotometric Determination of Thiocyanate and Its Application to Water and Saliva Analysis." Sensors 6, no. 10: 1224-1233.

Sensors EISSN 1424-8220 Published by MDPI AG, Basel, Switzerland RSS E-Mail Table of Contents Alert