Novel UiO‐66‐NH2/Gly/GO Nanocomposite Adsorbent for Ultra‐trace Analyzing of Chlorpyrifos Pesticide by Ion Mobility Spectrometry

Abstract

AbstractThis paper seeks to produce UiO‐66‐NH2/Gly/GO nanocomposite, which is solvothermally synthesised by the “prefunctionalisation” approach using 2‐aminoterephthalic acid as an organic linker in a Teflon lined autoclave and its linking to a graphene surface by glycine and finally characterized by methods such as FTIR spectrometer, Powder X‐ray diffraction (XRD), energy dispersive X‐ray analysis (EDAX), thermal stability measurement (TGA), transmission electron microscope (TEM), scanning electron microscope (SEM) and the Brunauer‐Emmet‐Teller (BET). UiO‐66‐NH2/Gly/GO nanocomposite has been exploited as an adsorbent in solid phase microextraction (SPME) method and also the pesticide chlorpyrifos as an organophosphorous pesticide is selected for the model compound. As for a determination system, Corona discharge ionization‐ion mobility spectrometry (CD‐IMS) has been employed. The nanocomposite capability in extracting the target analyte before and after the coating of the GO has been experimentally investigated. The IMS sensitivity has been strikingly increased in the course of using the GO as the nanocomposite coating. In order to increase the extraction efficiency and preconcentration of the analyte, both extraction temperature and time are scrutinized. All through this method, analysis factors are achieved as follows: linear dynamic range (LDR); 0.5‐20.0 μg L−1, correlation coefficient (R2); 0.9992, the limit of quantification (LOQ); 0.5 μg L−1, and limit of detection (LOD); 0.15 μg L−1. On the whole, the proposed approach seems to be regarded as a successful method for analyzing the organophosphouros pesticide.