Moleküler Baskılı Polimerler ile Modifiye Edilmiş Karbon Pasta Elektrotlarla Thiuramın Voltametrik Tayini

Öz

Spesifik tanıma özelliği bakımından molekül baskılama tekniği, üç boyutlu polimerik malzemelerin hazırlanmasında önemli bir araç haline gelmiştir. Üç boyutlu olarak çapraz bağlanmış polimerik malzemeler, kalıp molekülünün bulunduğu ortamdaki fonksiyonel monomerlerin polimerizasyonu ile elde edilirler. Daha sonra, uygun sökme prosedürüyle kalıp molekülünün şekil, boyut ve fonksiyonel gruplarına ait tamamlayıcı tanıma bölgeleri oluşturulur. Böylelikle, molekül baskılı polimerler, kalıp moleküle karşı seçici özellik göstermesinin yanı sıra kararlı bir yapıda bulunması, sıcaklığa ve basınca karşı dayanıklı, kimyasallara karşı dirençli olmaları ve tekrar kullanılabilmeleri gibi özelliklerinden dolayı sıklıkla kullanılmaktadır. Günümüzde, moleküler baskılama tekniği, kromatografi, sensör vb. gibi çeşitli analitik tekniklerle başarı bir şekilde birleştirilmiştir.

Bu çalışmada, thiuram baskılı mikroküreler sentezlendi ve FT-IR spektroskopisi ve Taramalı Elektron Mikroskobu (SEM) ile karakterize edildi. Thiuram molekülü baskılanmış polimerlerle modifiye edilmiş olan karbon pasta elektrot (CPE), difrensiyel puls voltametrisi (DPV) kullanılarak thiuram etken maddesi içeren pestisit örneğinde thiuram tayini yapılmıştır.

Anahtar Kelimeler

• Thiuram,Elektrokimyasal Sensör,Molekül Baskılı Polimer,Karbon Pasta Elektrot

Voltammetric Determination of Thiuram by Carbon Paste Electrodes Modified with Molecular Imprinted Polymers

Abstract

Molecular imprinting has become a powerful tool for the preparation of three dimensional polymeric materials with special recognition ability. The three dimensionally cross-linked polymeric materials are obtained by polymerization of functional monomers in the presence of template molecule. Then, leaching of template molecules by a leaching procedure generates the recognition cavities complementary to the shape, size and functional groups of the template molecules. Thus, molecularly imprinted polymers are often used because of their stability, their resistance to temperature and pressure, resistance to effects of the chemicals and their re-use, as well as their selective properties against template molecule. Nowadays, molecular imprinting technique has been successfully assembled with a several of analytical techniques in chromatography, sensor etc.

In this study, thiuram imprinted microbeads were synthesized and characterized by Fourier Transform Infrared Spectroscopy (FT-IR) and Scanning Electron Microscopy (SEM). A carbon paste electrode (CPE) was modified with thiuram molecular imprinted polymer (MIP) and used for the determination of thiuram in active substance of pesticide sample by Differential Pulse Voltammetry (DPV).

Keywords

• Thiuram,Electrochemical Sensor,Molecular Imprinting Polymer,Carbon Paste Electrode

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