Electropolymerization of single-walled carbon nanotubes composited with polypyrrole as a solid-phase microextraction fiber for the detection of acrylamide in food samples using GC with electron-capture detection

2013 ◽  
Vol 36 (24) ◽  
pp. 3889-3895 ◽  
Author(s):  
Yanqin Qu ◽  
Congcong Liu ◽  
Feng Luo ◽  
Bin Qiu ◽  
Xi Chen
Keyword(s):  
Carbon Nanotubes ◽  
Electron Capture ◽  
Solid Phase Microextraction ◽  
Solid Phase ◽  
Single Walled Carbon Nanotubes ◽  
Food Samples ◽  
Electron Capture Detection ◽  
Single Walled Carbon ◽  
Walled Carbon Nanotubes

scholarly journals Simultaneous Determination of Parathion, Malathion, Diazinon, and Pirimiphos Methyl in Dried Medicinal Plants Using Solid-Phase Microextraction Fibre Coated with Single-Walled Carbon Nanotubes

2012 ◽  
Vol 2012 ◽  
pp. 1-8 ◽  
Author(s):  
Reza Ahmadkhaniha ◽  
Nasrin Samadi ◽  
Mona Salimi ◽  
Parisa Sarkhail ◽  
Noushin Rastkari
Keyword(s):  
Carbon Nanotubes ◽  
Solid Phase Microextraction ◽  
Limit Of Detection ◽  
Solid Phase ◽  
Organophosphorus Pesticides ◽  
Single Walled Carbon Nanotubes ◽  
Single Walled Carbon ◽  
Pirimiphos Methyl ◽  
Walled Carbon Nanotubes

A reliable and sensitive headspace solid-phase microextraction gas chromatography-mass spectrometry method for simultaneous determination of different organophosphorus pesticides in dried medicinal plant samples is described. The analytes were extracted by single-walled carbon nanotubes as a new solid-phase microextraction adsorbent. The developed method showed good performance. For diazinon and pirimiphos methyl calibration, curves were linear (r2≥0.993) over the concentration ranges from 1.5 to 300 ng g−1, and the limit of detection at signal-to-noise ratio of 3 was 0.3 ng g−1. For parathion and malathion, the linear range and limit of detection were 2.5–300 (r2≥0.991) and 0.5 ng g−1, respectively. In addition, a comparative study between the single-walled carbon nanotubes and a commercial polydimethylsiloxane fibre for the determination of target analytes was carried out. Single-walled carbon nanotubes fibre showed higher extraction capacity, better thermal stability (over350∘C), and longer lifespan (over 250 times) than the commercial polydimethylsiloxane fibre. The developed method was successfully applied to determine target organophosphorus pesticides in real samples.

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