Identification of degraded products of aldicarb due to the catalytic behavior of titanium dioxide/polyacrylonitrile nanofiber.
Photocatalytic properties of fibers containing TiO2 nanoparticles were explored for use as a self-decontaminating material using degradation of the pesticide aldicarb as the model toxin. During the analysis of the aldicarb treated sample by liquid chromatography (LC) with diode array detector (DAD), an unidentified peak was found at relative retention time (RT) 3.9 min when compared to aldicarb and major metabolites, aldicarb sulfoxide, and aldicarb sulfone. An analytical method was developed to confirm and identify this degradation product. LC-APCI/MS techniques were used first to analyze molecular ions and major fragments comparing retention times and spectra with those of known standards. FTIR and LC-MS/MS techniques were used to confirm the identity of the degradation product as 2-propenal, 2-methyl-, O-[(methylamino)carbonyl]oxime.
Dixit
Vivechana
V
Fiber Science, Cornell University, Ithaca, NY 14853-4401, USA.
Tewari
Jagdish C
JC
Obendorf
S Kay
SK
D000180:Acrylic Resins / Q000737:chemistry*; D000448:Aldicarb / Q000031:analogs & derivatives / Q000032:analysis* / Q000528:radiation effects; D002384:Catalysis; D002851:Chromatography, High Pressure Liquid / Q000379:methods; D003666:Decontamination / Q000379:methods; D008832:Microchemistry / Q000379:methods; D015394:Molecular Structure; D053761:Nanocomposites / Q000737:chemistry; D049329:Nanostructures / Q000737:chemistry*; D010091:Oximes / Q000737:chemistry; D010573:Pesticide Residues / Q000032:analysis*; D010782:Photolysis; D017550:Spectroscopy, Fourier Transform Infrared / Q000379:methods; D053719:Tandem Mass Spectrometry / Q000379:methods; D014025:Titanium / Q000737:chemistry*; D014466:Ultraviolet Rays
D000180:Acrylic Resins; D010091:Oximes; D010573:Pesticide Residues; C009495:titanium dioxide; C010504:polyacrylonitrile; C030579:aldicarb sulfoxide; D000448:Aldicarb; D014025:Titanium; C030580:aldicarb sulfone