Table 1.
GC-MS/MS optimised parameters.
| Compound | RT (min) |
Ion Precursor; Ion Product 1 (m/z) |
CE * (eV) |
Ion Precursor; Ion Product 2 (m/z) |
CE * (eV) |
Ion Precursor; Ion Product 3 (m/z) |
CE * (eV) |
|---|---|---|---|---|---|---|---|
| Organochlorine pesticides (OCPs) | |||||||
| Aldrin | 23.22 | 262.8; 193.1 | 40 | 262.8; 191.1 | 40 | ||
| Chlordane, cis- | 26.68 | 374.7; 266.0 | 27 | 374.7; 302.9 | 10 | ||
| Chlordane, trans- | 26.09 | 374.8; 266.0 | 30 | 374.8; 268 | 22 | ||
| Chlorobenzilate | 12.20 | 139.1; 111.0 | 16 | 139.1; 75.1 | 22 | ||
| p,p′-DDD | 28.95 | 234.8; 165.1 | 27 | 234.8; 199.1 | 20 | ||
| p,p′-DDE | 27.51 | 246.0; 175.2 | 40 | 246; 176.1 | 10 | ||
| o,p′-DDT | 29.06 | 234.9; 165.0 | 27 | 234.9; 199.1 | 17 | ||
| p,p′-DDT | 30.13 | 234.9; 165.1 | 25 | 234.9; 199 | 20 | ||
| Dieldrin | 27.55 | 262.7; 192.9 | 37 | 262.7; 191 | 35 | ||
| alpha-endosulfan | 26.58 | 240.9; 206.1 | 15 | 240.9; 171 | 30 | ||
| beta-endosulfan | 28.66 | 241.0; 206.0 | 15 | 238.8; 204 | 15 | 195; 159 | 5 |
| endosulfansulfate | 30.03 | 271.9; 236.9 | 10 | 271.9; 116.9 | 40 | ||
| Endrin | 28.33 | 262.7; 193.1 | 35 | 262.7; 191.1 | 35 | ||
| alpha-HCH | 15.78 | 218.9; 183.0 | 7 | 218.9; 181 | 7 | ||
| beta-HCH | 17.12 | 218.9; 183.0 | 6 | 218.9; 180.8 | 6 | ||
| gamma-HCH/Lindan | 17.46 | 218.9; 183.0 | 5 | 218.9; 181.0 | 5 | ||
| Heptachlor | 21.35 | 271.6; 237.0 | 15 | 273.7; 239 | 15 | ||
| Heptachlorepoxid, egzo- | 25.10 | 352.8; 263.0 | 20 | 352.8; 281.9 | 20 | ||
| Heptachlorepoxid, endo- | 25.29 | 252.8; 183.1 | 40 | 252.8; 181.2 | 40 | ||
| Hexachlorobenzene | 16.17 | 283.9; 213.9 | 32 | 283.9; 248.9 | 32 | ||
| Methoxychlor | 14.07 | 227.0; 141.1 | 10 | 227.0; 169.1 | 12 | ||
| Pentachloroaniline | 19.94 | 264.7; 194.0 | 28 | 264.7; 203 | 28 | ||
| Quintozene | 17.72 | 236.9; 118.9 | 30 | 236.9; 142.7 | 30 | ||
| Organophosphorus pesticides (OPPs) | |||||||
| Azinphos-ethyl | 33.85 | 160.0; 132.0 | 0 | 132.; 104.0 | 4 | 159.9; 104.9 | 12 |
| Bromophos-ethyl | 26.26 | 358.8; 303.0 | 15 | 358.8; 330.9 | 5 | ||
| Carbophenothion | 29.78 | 156.9; 74.9 | 40 | 156.9; 121.1 | 25 | ||
| Chlorfenvinphos | 25.54 | 266.9; 159.0 | 15 | 266.9; 81 | 30 | ||
| Chlorpyrifos | 23.68 | 314.0; 258.1 | 7 | 314; 286.1 | 5 | ||
| Chlorpyrifos-methyl | 21.00 | 285.7; 93.0 | 20 | 287.7; 93.0 | 20 | ||
| Diazinon | 18.43 | 199.0; 92.9 | 18 | 199; 135,1 | 10 | ||
| Dichlorvos | 7.37 | 109.0; 78.7 | 5 | 184.9; 93 | 10 | ||
| Ethion | 29.12 | 230.8; 128.9 | 25 | 230.8, 175 | 10 | ||
| Fenchlorphos | 21.83 | 284.7; 269.8 | 15 | 284.7; 93 | 30 | ||
| Fenithrotion | 22.57 | 276.8; 260.0 | 5 | 277; 125.1 | 20 | 277; 109.1 | 20 |
| Fenthion | 19.30 | 278.0; 109.1 | 20 | 278.0; 124.9 | 20 | ||
| Malaoxon | 17.23 | 127.0; 98.8 | 20 | 127.0; 82.9 | 20 | ||
| Malathion | 23.17 | 173.0; 98.8 | 15 | 173.0; 117.2 | 10 | 158.0; 125.0 | 8 |
| Methidathion | 26.18 | 145.0; 85.0 | 5 | 145; 58.1 | 15 | 302; 85 | 16 |
| Mevinphos | 9.80 | 127.0; 109.1 | 11 | 192; 127 | 11 | ||
| Paraoxon-metyl | 14.69 | 230.0; 200.1 | 5 | 230.0; 136.1 | 5 | ||
| Parathion-ethyl | 23.70 | 291.0; 109.0 | 10 | 291.0; 81.0 | 25 | ||
| Parathion-methyl | 21.00 | 262.8; 109.0 | 9 | 263; 246 | 2 | 262.8; 79.1 | 30 |
| Pirimiphos-methyl | 18.45 | 290.0; 124.9 | 25 | 290.0; 151.0 | 20 | ||
| Profenofos | 27.39 | 208.0; 63.1 | 44 | 338.9; 269.0 | 12 | ||
| Propetamphos | 17.77 | 138.2; 109.9 | 5 | 138.2; 64.2 | 15 | ||
| Pyrazophos | 33.70 | 220.9; 193.1 | 10 | 220.9; 149.1 | 10 | ||
| Tetrachlorvinphos | 26.59 | 330.8; 109.0 | 20 | 330.8; 79.0 | 27 | ||
| Triazophos | 29.54 | 161.0; 134.0 | 5 | 161.0; 106.0 | 10 | 257.0; 162.0 | 5 |
| Pyrethroids | |||||||
| Allethrin | 25.60 | 123.0; 81.2 | 7 | 123; 79.1 | 22 | ||
| Bifenthrin | 31.68 | 180.9; 166.1 | 12 | 180.9; 165.2 | 30 | ||
| Cyfluthrin | 35.89 | 162.9; 91.1 | 15 | 162.9; 127.1 | 5 | ||
| Cypermethrin | 36.64 | 180.9; 152.1 | 28 | 180.9; 127.1 | 30 | ||
| Deltamethrin | 41.89 | 180.9; 152.2 | 25 | 253.0; 93.0 | 20 | ||
| Fenpropathrin | 31.87 | 180.9; 152.1 | 27 | 181.1; 127.1 | 35 | ||
| Fluvalinate, tau | 34.98 | 250; 200 | 40 | 250.0; 55.0 | 40 | ||
| lambda-Cyhalothrin | 30.24 | 181.1; 152 | 25 | 197.0; 161.0 | 5 | 209.0; 111.0 | 15 |
| Fenvalerate | 39.24 | 166.9; 125.1 | 10 | 125.1; 89.1 | 25 | ||
| Permethrin | 34.89 | 183.1; 168.1 | 15 | 183.1; 153.1 | 15 | 183; 115.2 | 25 |
| Resmethrin | 28.05 | 123.0; 81.4 | 10 | 123.0; 95.0 | 10 | ||
| Tetramethrin | 31.67 | 164.0; 107.3 | 12 | 164; 135.1 | 10 | ||
| Carbamates | |||||||
| Carbaryl | 21.21 | 143.9; 115.1 | 28 | 143.9; 116.2 | 13 | ||
| Carbofuran | 13.15 | 164.0; 103.0 | 25 | 164.0; 149.1 | 10 | ||
| Furathiocarb | 32.49 | 163.0; 107.0 | 10 | 163; 77 | 30 | 164; 149.2 | 10 |
| Pirimicarb | 19.83 | 238.0; 166.2 | 7 | 166.2; 95.9 | 15 | ||
| Seven PCB congeners | |||||||
| PCB 28 | 20.52 | 255.8, 186.1 | 28 | 257.8; 186 | 28 | ||
| PCB 52 | 22.48 | 291.9; 222.0 | 30 | 291.9; 220 | 30 | ||
| PCB 101 | 26.42 | 325.8; 256.1 | 39 | 325.8; 291 | 12 | ||
| PCB 118 | 28.67 | 325.7; 256.0 | 30 | 325.7; 254 | 27 | ||
| PCB 138 | 30.27 | 359.7; 289.9 | 30 | 359.7; 324.9 | 15 | ||
| PCB 153 | 29.40 | 359.7; 289.9 | 30 | 359.7; 287.9 | 30 | ||
| PCB 180 | 32.23 | 395.6; 325.9 | 30 | 395.6; 360.9 | 15 |
* CE—collision energy.