The hyphenated CSPT-potentiometric analytical system: An application for vegetable oil quality control
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- 作者：Luca Tortora ; Manuela Stefanelli ; Marco Mastroianni ; Larisa Lvova ; Corrado Di Natale ; Arnaldo D’ ; Amico ; Daniel Filippini ; Ingemar Lundströ ; m ; Roberto Paolesse
- 关键词：Multispectral imaging ; Potentiometry ; Ion selective electrodes ; Hyphenated system
- 刊名：Sensors and Actuators B: Chemical
- 出版年：2009
- 出版时间：5 November 2009
- 年：2009
- 卷：142
- 期：2
- 页码：457-463
- 全文大小：1142 K
文摘
The computer screen photo assisted technique (CSPT) has been used to develop a hyphenated optical-potentiometric sensing array, based on porphyrinoid materials dispersed into PVC membranes.
Sensing layers have been deposited onto indium tin oxide (ITO) glass slides, which were exploited as electrodes, for potentiometric measurements, and chromophore spots, to obtain CSPT data. Both measurements were contemporaneously carried out in the hyphenated sensing platform.
The performances of the hyphenated sensing array were first tested for the detection of model analytes, characteristics of vegetable oil matrices, and then evaluated in the discrimination of real samples of olive and seed oils. The results obtained demonstrated that the hyphenated system affords a significant improvement of information and oils classification with respect to the individual potentiometric and optical components.