Rapid Simultaneous Determination of 43 Pesticide Residues in Schizonepeta tenuifolia by Gas Chromatography Mass Spectrometry

Table 1

Retention times, target ions, and qualifier ions of the selected pesticides.

Pesticide	Retention time	Target ion	Qualifier ion 1	Qualifier ion 2	Qualifier ion 3
Dichlorvos	5.53	109	185	220
Carbofuran	6.03	164	122	123
Methamidophos	6.18	94	95	126
Ethoprophos	10.60	158	200	242
Omethoate	11.58	156	110	126
Phorate	11.63	121	231	260
Hexachlorobenzene	12.07	284	286	282
α-BHC	12.40	219	183	221	254
Monocrotophos	12.96	127	109	192
Quintozene	13.50	237	249	295
γ-BHC	13.87	183	219	221	254
Dimethoate	14.03	87	93	125
Acetochlor	15.07	146	162	223
β-BHC	15.12	219	217	181	254
Prometryn	16.14	241	184	226
δ-BHC	16.22	219	181	217	254
Metalaxyl	16.42	206	234	249
Chlorothalonil	16.52	266	231	194
Aldrin	16.52	263	265	329	293
Chlorpyrifos	17.31	314	258	286
Parathion	17.98	291	186	235
Dicofol	18.60	139	141	252	250
Pendimethalin	18.81	252	220	162
cis-Heptachlor epoxide	19.00	353	351	355
trans-Heptachlor epoxide	19.34	353	351	355
cis-Chlordane	20.12	373	375	377
trans-Chlordane	20.53	373	375	377
Thiamethoxam	20.88	182	212	247
pp'-DDE	21.73	318	316	246	248
Dieldrin	22.10	263	277	345	380
Fludioxonil	23.39	248	127	154
op'-DDT	23.50	235	237	165	199
Nitrofen	23.60	283	139	202
pp'-DDD	23.89	235	237	165	199
β-Endosulfan	24.21	241	265	339
Propiconazole	24.62	259	173	261
pp'-DDT	24.65	235	237	165	246
Bifenthrin	24.92	181	165	166
Fenpropathrin	25.75	181	265	349
Cyhalothrin	26.40	181	197	141
Cypermethrin	29.88	181	152	180
Fenvalerate	32.06	167	181	225	419
Difenoconazole	34.88	323	325	265