Chemically modified ion-sensitive field-effect transistors: elimination of the liquid juction potential in a double sensor flow-injection analysis cell

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Cobben, Peter L.H.M. and Egberink, Richard J.M. and Bomer, J.G. and Schouwenaar, Robert and Brzozka, Zbigniew and Bergveld, Piet and Reinhoudt, David N. and Bos, Martinus (1993) Chemically modified ion-sensitive field-effect transistors: elimination of the liquid juction potential in a double sensor flow-injection analysis cell. Analytica Chimica Acta, 276 (2). pp. 347-352. ISSN 0003-2670

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Abstract:A flow-through cell was designed that can be used for flow-injection analysis with two chemically modified ion-sensitive field-effect transistors (CHEMFETs) in close proximity. This offers the possibility of a differential measurement without influence of the liquid junction potential. The differential signal of a potassium- and a sodium-selective CHEMFET responded in a Nernstian manner and selectively towards potassium in an excess (fixed) concentration of sodium. A highly lead-selective CHEMFET was used in the same flow cell in combination with a potassium-selective CHEMFET.
Item Type:Article
Copyright:© 1993 Elsevier Science
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Link to this item:http://purl.utwente.nl/publications/12573
Official URL:http://dx.doi.org/10.1016/0003-2670(93)80403-8
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Metis ID: 106754