Photocatalytic Degradation of Trifluralin, Clodinafop-Propargyl, and 1,2-Dichloro-4-Nitrobenzene As Determined by Gas Chromatography Coupled with Mass Spectrometry

Table 1

Probable products formed during the photocatalytic degradation of trifluralin (1) along with their retention time and corresponding mass fragmentation.

Retention time (min)	Name	Confirmed by	Mass fragmentation
9.4	2,6-Dinitro-N,N-dipropyl-4-(trifluoromethyl)aniline (1)	NIST	335.142 (M^+), 318.138, 306.136/307.105, 290.105, 264.076/265.053, 248.054, 206.051, 160.049, 145.035
9.9	2-Ethyl-7-nitro-5-(trifluoromethyl)-1H-benzo[d]imidazole (12)	NIST	259.157 (M^+), 241.123, 227.105, 213.095, 207.014, 199.073, 186.098, 158.187, 147.827, 114.459, 99.536, 54.368
11.0	2-Ethyl-7-nitro-1-propyl-5-(trifluoromethyl)-1H-benzo[d]imidazole (9)	NIST	301.134 (M^+)/302.143, 282.140, 272.098, 258.078, 243.087/244.094, 212.077/213.083, 159.043, 145.037
12.7	7-Amino-2-ethyl-1-propyl-5-(trifluoromethyl)-1H-benzo[d]imidazole 3-oxide (7)	MS	287.150 (M^+)/288.159, 258.113/259.124, 245.103, 230.82, 217.069, 202.083
12.9	3-(2-(Hydroxyamino)-6-nitro-4-(trifluoromethyl)phenylamino)propan-1-ol (10)	MS	295.164 (M^+)/296.177, 280.140, 266.123, 252.111/23.111, 239.112, 225.095
13.0	2-Ethyl-1-propyl-5-(trifluoromethyl)-1H-benzo[d]imidazol-7-amine (11)	MS	271.155 (M^+)/272.160, 256.131, 242.113, 229.104/228.097
15.2	3-(2,6-Dinitro-4-(trifluoromethyl)phenylamino)propan-1-ol (6)	MS	310.171 (M^+), 295.153, 283.159/284.162, 268.134, 254.116, 240.101, 227.102, 213.089/214.091, 185.057

Note that the number in the parenthesis corresponds to the number of the compound in the degradation scheme.