Sol–gel/nanoclay composite as a solid-phase microextraction fiber coating for the determination of organophosphorus pesticides in water samples

2014 ◽  
Vol 407 (4) ◽  
pp. 1241-1252 ◽  
Author(s):  
Mohammad Saraji ◽  
Mohammad Taghi Jafari ◽  
Hossein Sherafatmand
Keyword(s):  
Water Samples ◽  
Solid Phase Microextraction ◽  
Solid Phase ◽  
Organophosphorus Pesticides ◽  
Sol Gel ◽  
Fiber Coating ◽  
Pesticides In Water

Sol-Gel Hybrid Cyanopropyltriethoxysilane-methyltrimethoxysilane as Adsorbent for Dispersive-Micro Solid Phase Extraction of Selected Organophosphorus Pesticides in Water Samples

2014 ◽  
Vol 71 (5) ◽  
Author(s):  
Norfazilah Muhamad ◽  
Wan Aini Wan Ibrahim ◽  
Mohd Marsin Sanagi
Keyword(s):  
Solid Phase Extraction ◽  
Water Samples ◽  
Solid Phase ◽  
Organophosphorus Pesticides ◽  
Sol Gel ◽  
Polar Compounds ◽  
Gas Chromatography Mass Spectrometry ◽  
Phase Extraction ◽  
Pesticides In Water ◽  
Spe Method

Commercial solid phase extraction (SPE) sorbents normally used for organophosphorus pesticides (OPPS) analysis is C18.  However, it show low retention for polar compounds and is rather expensive. The limitations are overcome through the development of a new sol-gel hybrid material, cyanopropyltriethoxysilane-methyltrimethoxysilane (CNPrTEOS-MTMOS). Sol-gel hybrid CNPrTEOS-MTMOS was successfully synthesized and applied as an adsorbent for dispersive-micro-SPE (D-µ-SPE) of three selected OPPs from several water samples. Extracted analytes were analyzed using gas chromatography-mass spectrometry.  Under the optimum conditions (100 mg CNPrTEOS-MTMOS as adsorbent, 10 mL water samples, 7 min extraction time, 300 µL methanol as desorption solvent and 3 min desorption time), the method showed excellent detection limits (0.01-0.004 µg L-1  at S/N = 3) and linear range achieved were 0.01-10 µg L-1. The CNPrTEOS-MTMOS sorbent offers an alternative sorbent material for the extraction of OPPs of various polarity. The developed D-µ-SPE method was successfully applied for the simultaneous analysis of OPPs in several water samples and results were compared with published results.  Sol-gel hybrid CNPrTEOS-MTMOS showed high potential as an alternative adsorbent for D-µ-SPE technique for OPPs.

Sol–gel fabrication and performance evaluation of graphene-based hydrophobic solid-phase microextraction fibers for multi-residue analysis of pesticides in water samples

2020 ◽  
Vol 12 (31) ◽  
pp. 3954-3963 ◽  
Author(s):  
Jiaxin Hu ◽  
Cheng Qian ◽  
Yinchenxi Zhang ◽  
Yonghui Tian ◽  
Yixiang Duan
Keyword(s):  
Performance Evaluation ◽  
Solid Phase Microextraction ◽  
Solid Phase ◽  
Organophosphorus Pesticides ◽  
Sol Gel ◽  
Residue Analysis ◽  
Environmental Threats ◽  
Pesticides In Water ◽  
And Performance ◽  
Effective Analysis

Widespread use of organophosphorus pesticides poses serious environmental threats, and hence calls for effective analysis methods for these classes of compounds.

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