scholarly journals Determination of six organophosphorus pesticides in water samples by three-dimensional graphene aerogel-based solid-phase extraction combined with gas chromatography/mass spectrometry

RSC Advances ◽  
2018 ◽  
Vol 8 (19) ◽  
pp. 10277-10283 ◽  
Author(s):  
P. Sun ◽  
Y. L. Gao ◽  
C. Xu ◽  
Y. F. Lian
Keyword(s):  
Solid Phase ◽  
Organophosphorus Pesticides ◽  
Chemical Reduction ◽  
Three Dimensional ◽  
Gas Chromatography Mass Spectrometry ◽  
Graphene Aerogel ◽  
3D Graphene ◽  
Pesticides In Water ◽  
Drying Treatment

3D graphene aerogel fabricated via chemical reduction followed by freeze-drying treatment was used as SPE sorbent to extract OPPs from water sample.

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.

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