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Reference type: Journal
Authors: D'Agostino G, Alberti G, Biesuz R, Pesavento M
Article Title: Potentiometric sensor for atrazine based on a molecular imprinted membrane.
Publication date: 2006
Journal: Biosensors and Bioelectronics
Volume: 22
Issue: (1)
Page numbers: 145-152.
DOI: 10.1016/j.bios.2006.05.014
Alternative URL: http://www.sciencedirect.com/science/article/B6TFC-4KB111X-2/2/eeb169369e1c75bb610e7aa16bfa6343

Abstract: A molecular imprinted polymer (MIP) membrane for atrazine, not containing macropores, was synthesized and implemented in a potentiometric sensor. It is expected to work like a solid ISE (where the specific carrier are the imprinted sites) the specific carrier being the imprinted site. The active ion is the protonated atrazine, positively charged. To form this species the determination is carried out in acidic solution at pH lower than 1.8, in which atrazine is prevalently monoprotonated. At these conditions the membrane potential increases with atrazine concentration over a wide concentration range (3 x 10-5 to 1 x 10-3 M). The slope of the function E versus log c is about 25 mV/decade, showing that the atrazine form sorbed on MIP is the biprotonated one. The detection limit is determined by the relatively high concentration of atrazine released by the membrane in the sample solution at the considered conditions. It seems to be independent of the atrazine concentration in the internal solution of the sensor, but it depends on the acidity of the solution. The response time is less than 10 s and the sensor can be used for more than 2 months without any divergence
Template and target information: atrazine
Author keywords: molecular imprinted polymer, potentiometric sensor, atrazine, Ion selective electrode

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