Detection of Pesticide via Nanoparticle Based Quartz Crystal Microbalance Sensor

Year 2020, Volume: 48 Issue: 1, 75 - 82, 17.04.2020

Monireh Bakhshpour , İlgım Göktürk Oğuz Çakır , Fatma Yılmaz , Zübeyde Baysal Adil Denizli

https://doi.org/10.15671/hjbc.629138

Cited By: 1

Abstract

In this study, Chlorpyrifos (Cps) imprinted
nanoparticles based QCM sensor were prepared for detection of chlorpyrifos
pesticide. Cps imprinted poly(ethylene glycol dimethacrylate-
N-metacryloyl-(L)-tryptophan) (PEDMATrp) nanoparticles were prepared and then
these nanoparticles were attached to the surface of QCM sensor chip. Also,
non-imprinted PEDMATrp QCM sensor was prepared without using the Cps molecule to
evaluate the imprinting efficiency. Cps imprinted and non-imprinted
nanoparticles were characterized by zeta-sizer and Fourier transform infrared
spectrophotometer-attenuated total reflection (FTIR-ATR) spectrophotometer. Cps
imprinted and non-imprinted QCM sensors were also characterized by atomic force
microscopy, ellipsometer, and contact angle measurements. The prepared sensors
were applied for selective Cps detection in aqueous solution for the range of 0.015-2.9
nM. The selectivity studies of the prepared PEDMATrp quartz crystal
microbalance sensor were examined by using competitive pesticide molecules such
as Diazinon and Parathion (0.75 nM), which are similar to Cps in size and
shape. The reusability studies of the prepared sensors were investigated by
applying the same pesticide concentration (1.45 nM), four times consecutively.

Keywords

Chlorpyrifos, Molecular imprinting, Nanoparticle, Quartz crystal microbalance

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