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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

10.1007/bf02104536

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1436-5073

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Graphene nanocomposite modified glassy carbon elec

Authors: Biljana Nigović Ana Mornar Miranda Sertić
Publish Date: 2016/02/13
Volume: 183, Issue: 4, Pages: 1459-1467
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Abstract

Graphene nanoplatelets were dispersed in a Nafion matrix and used to modify a glassy carbon electrode for rapid determination of quetiapine QTP at the working potential of +990 mV vs Ag/AgCl The material was deposited by dropcasting and characterized by scanning electron microscopy Owing to the unique properties of graphene and the accumulation capability of the anionic polymer for the cationic target analyte the modified electrode has a strongly improved limit of detection 22 nM and works in the 100 nM to 10 μM concentration range Lowcost quantification of QTP in urine samples without prior extraction was achieved after selective adsorption of QTP at the surface using differential pulse voltammetry In comparison with HPLC method the modified electrode allows simpler analysis of QTP in entericcoated tablets that takes 40 s onlyGraphene nanoplatelets were dispersed in a Nafion matrix and used to modify a glassy carbon electrode for rapid determination of quetiapine in tablets takes 40 s only and urine samples after selective adsorption of positively charged drug molecules

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