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Title of Journal: Microchim Acta

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Abbravation: Microchimica Acta

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Springer Vienna

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DOI

10.1002/chin.199249192

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1436-5073

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Biosensor for aluminiumIII based on its inhibiti

Authors: Miriam BarqueroQuirós Olga DomínguezRenedo Maria Asunción AlonsoLomillo María Julia ArcosMartínez
Publish Date: 2012/07/21
Volume: 179, Issue: 1-2, Pages: 65-70
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Abstract

We report on an amperometric assay for AlIII ions that is based on the inhibition of the enzyme αchymotrypsin Screenprinted carbon electrodes modified with gold nanoparticles were used as solid supports for the immobilization of the enzyme The amperometric response of the synthetic enzyme substrate substrate NbenzoylLtyrosine ethyl ester is affected by AlIII ions and this leads to a decrease in the amperometric oxidation current The assay has a detection limit of 33 μM of AlIII The repeatability and reproducibility of the method are 69 n = 3 and 64 n = 5 respectively Main interferents include MoVI WVI and FeIII ions The method was successfully applied to the determination of AlIII in tap waterAn electrochemical biosensor for Al III was developed based on screenprinted carbon electrodes modified with gold nanoparticles and the enzyme α chymotrypsin The biosensor had high sensitivity high selectivity ease of use and construction for Al III analysis

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