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

Table 3

Probable products formed during the photocatalytic degradation of 1,2-dichloro-4-nitrobenzene (3) along with their retention time and corresponding mass fragmentation.

Retention time (min)	Name	Confirmed By	Mass fragmentation
16.6	1,2-Bis(3,4-dichlorophenyl)diazene (27)	NIST	318 (M^+)/319.947, 172.975/174.9, 144.963/146.9, 108.984, 75.021
8.3	Dichloronitrophenol (22)	NIST	206.957 (M^+)/208.9/210.970, 176.991/178.9, 160.969, 148.969, 132.969/134.967, 124.989, 112.989, 96.986, 86.969, 72.986, 62.016
6.7	2-Chloro-5-nitrophenol (23)	NIST	172.990 (M^+)/174.990, 142.992/144.992, 126.995, 107.011, 98.994, 91.012, 72.979, 63.018, 53.001
6.6	3,4-Dichloroaniline (25)	NIST	160.98 (M^+)/162.9/164.979, 126.008, 98.995, 90.027
6.3	3,4-Dichlorophenol (24)	NIST	161.967 (M^+)/163.9/165.962, 144.707, 98.995, 63.020
6.2	1,2-Dichloro-4-nitrobenzene (3)	NIST	190.987 (M^+)/192.978/194.970, 160.974/162.971, 144.983/146.974, 132.972/133.9, 108.995/110.987, 83.978, 74.016/75.024/73.001, 50.017

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