Ozonation of trifluralin particles: an experimental investigation with a vacuum ultraviolet photoionization aerosol time-of-flight mass spectrometer.
The ozonation of trifluralin coated on azelaic acid particles is investigated with a vacuum ultraviolet photoionization aerosol time-of-flight mass spectrometer. The suspended trifluralin particles with the mean diameter of 270nm react with approximately 100ppm ozone in an aerosol reaction chamber under ambient pressure and room temperature (1atm, 298K). The time-of-flight mass spectra of the trifluralin particles and the solid state ozonides are obtained. The assignments of the mass spectra reveal that the major primary ozonides of trifluralin particles are 2,6-dinitro-N-propyl-N-propanoyl-4-(trifluoromethyl) benzamine and 2,6-dinitro-N-(propan-2(and 3)-ol)-N-propyl-4-(trifluoromethyl) benzamine. The major secondary ozonides of trifluralin 2-ethyl-7-nitro-5-(trifluoromethyl) benzimidazole-3-oxide, 2,6-dinitro-N-propyl-4-(trifluoromethyl) benzenamine and 2,6-dinitro-N-(formyl)-N-propyl-4-(trifluoromethyl) benzamine are observed. The primary ozonides are directly resulted from the oxidation of N-propyl groups. The pathways of the primary ozonation are proposed in the paper.
Meng
Junwang
J
Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences, Beijing, 100085, China.
Yang
Bo
B
Zhang
Yang
Y
Shu
Xi
X
Shu
Jinian
J
D000336:Aerosols; D002244:Carbon / Q000737:chemistry; D004867:Equipment Design; D008401:Gas Chromatography-Mass Spectrometry / Q000379:methods; D007477:Ions; D013058:Mass Spectrometry / Q000379:methods*; D008956:Models, Chemical; D010126:Ozone / Q000737:chemistry*; D010316:Particle Size; D010575:Pesticides / Q000032:analysis*; D010777:Photochemistry / Q000379:methods; D013696:Temperature; D013997:Time Factors; D014274:Trifluralin / Q000737:chemistry*; D014466:Ultraviolet Rays; D014618:Vacuum
D000336:Aerosols; D007477:Ions; D010575:Pesticides; D010126:Ozone; D002244:Carbon; D014274:Trifluralin