Sol-gel-based silver nanoparticles-doped silica – Polydiphenylamine nanocomposite for micro-solid-phase extraction

Analytica Chimica Acta
Habib Bagheri, Solmaz Banihashemi

Abstract

A nanocomposite of silica-polydiphenylamine doped with silver nanoparticles (Ag-SiO2-PDPA) was successfully synthesized by the sol-gel process. For its preparation, PDPA was mixed with butanethiol capped Ag nanoparticles (NPs) and added to the silica sol solution. The Ag NPs were stabilized as a result of their adsorption on the SiO2 spheres. The surface characteristic of nanocomposite was investigated using scanning electron microscopy (SEM). In this work the Ag-SiO2-PDPA nanocomposite was employed as an efficient sorbent for micro-solid-phase extraction (μ-SPE) of some selected pesticides. An amount of 15 mg of the prepared sorbent was used to extract and determine the representatives from organophosphorous, organochlorine and aryloxyphenoxy propionic acids from aqueous samples. After the implementation of extraction process, the analytes were desorbed by methanol and determined using gas chromatography-mass spectrometry (GC-MS). Important parameters influencing the extraction and desorption processes such as pH of sample solution, salting out effect, type and volume of the desorption solvent, the sample loading and eluting flow rates along with the sample volume were experimentally optimized. Limits of detection (LODs) and t...Continue Reading

References

Oct 16, 2003·Biomaterials·Hyung-Jun JeonSeong-Geun Oh
Apr 20, 2005·Langmuir : the ACS Journal of Surfaces and Colloids·Stephen Marcinko, Alexander Y Fadeev
Dec 30, 2011·Journal of Chromatography. a·Habib BagheriAli Aghakhani

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Citations

Oct 27, 2016·Advances in Colloid and Interface Science·Gandhali BapatSmita Zinjarde
Apr 2, 2019·Nanoscale·Guangfu LiaoBaizeng Fang

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