Compound Name
RT (min)
Quantitation MRM (CE)
Qualifier MRM 1 (CE)
Qualifier MRM 2 (CE)
Alpha- BHC
20.55
180.9→145 (15)
180.9→145 (15)
219→183 (5)
Hexachlorobenzene
20.74
283.8→213.9 (30)
283.8→248.8 (15)
281.8→211.9 (30)
Gamma- BHC
21.28
180.9→145 (15)
180.9→145 (15)
219→183 (5)
Beta-BHC
21.42
180.9→145 (15)
180.9→145 (15)
219→183 (5)
Delta- BHC
22.06
180.9→145 (15)
180.9→145 (15)
219→183 (5)
Heptachlor
23.33
272→236.9 (15)
236.8→118.9 (25)
273.9→238.9 (15)
Aldrin
24.09
263→193 (35)
263→191 (35)
263→263 (0)
Heptachlor epoxide
25.07
272→236.9 (15)
262.9→192.9 (35)
273.9→238.9 (15)
Oxychlordane
25.09
114.9→51.1 (25)
184.9→121 (15)
236.9→142.9 (25)
Gamma-chlordane
25.63
272→236.9 (15)
273.9→238.9 (15)
277→241 (5)
Endosulfan I
25.91
195.1→159 (5)
272→236.9 (15)
273.9→238.9 (15)
Alpha-chlordane
26.00
272→236.9 (15)
273.9→238.9 (15)
277→241 (5)
Trans-nonachlor
26.12
409→409 (0)
407→407 (0)
411→411 (0)
4,4'-DDE
26.53
246.1→176.2 (30)
315.8→246 (15)
317.8→317.8 (0)
Dieldrin
26.54
263→191 (35)
277→241 (5)
263→193 (35)
Endrin
27.03
263→193 (35)
263→191 (35)
263→263 (0)
Endosulfan II
27.25
195.1→159 (5)
206.9→172 (15)
180.9→145 (15)
4,4'-DDD
27.48
235.1→165.2 (20)
237→165.1 (27)
237→237 (0)
Endrin Aldehyde
27.70
184.9→121 (15)
206.9→172 (15)
195.1→159 (5)
Endosulfan Sulfate
28.23
272→236.9 (15)
273.9→238.9 (15)
277→241 (5)
4,4'-DDT
28.33
235.1→165.2 (20)
237→237 (0)
237→165.1 (27)
Endrin ketone
29.27
180.9→145 (15)
114.9→51.1 (25)
195.1→159 (5)
Methoxychlor
29.64
227→141.1 (40)
227→169.1 (30)
227→212 (17)
Mirex
30.51
272→236.9 (15)
273.9→236.9 (15)
273.9→238.9 (15)
Table 4:
Mass spectrometer settings for the OCP GC-MS/MS method, including precursor ion→product ion m/z values and collision energies, kV, (CE) in parentheses, with compounds arranged in retention time (RT) order.
