3
Table 1: SIM Scan parameters
Separation Conditions
Instrumentation:
Thermo Scientific TRACE GC Ultra™
Carrier gas:
Helium
Split flow:
50 mL/min
Column flow:
1.2 mL/min, Constant flow
Oven temperature:
80 °C (0.5 min), 30 °C/min, 220 °C (4 min), 10 °C/min,
320 °C (10 min)
Injector type:
PTV simulated on-column
Injector mode:
Splitless (10 min) 30 mL/min flow rate, constant septum purge
Injector temperature phases:
40 °C (0.10 min), transfer 12 °C/sec, 330 °C (10 min) min
Detector type:
Thermo Scientific ISQ™ mass spectrometer
Transfer line temperature:
260 °C
Source temperature:
220 °C
Ionization conditions:
EI
Electron energy: 70
eV
Emission current:
25 µA
SIM scan parameters:
Table 1
Scan Window
Start Time (min)
Compound Name
Mass List (Quan), Qual ions Total Scan
Time (s)
5.50
1,2,3,4-tetrachloro-naphthalene (IS)
(264), 268, 266,
0.222
9.50
Bifenthrin
(181), 165, 166, 182
0.216
14.00
cis/trans
permethrin
(183), 184, 163, 165
0.216
15.40
Cyfluthrin/cypermethrin
(226), (181), 182, 163, 165, 166
0.234
Injection Conditions
Instrumentation:
Thermo Scientific TriPlus RSH Autosampler
Injection Volume:
2 µL
Injection depth:
70 mm
Penetration speed:
10 mm/s
Injection speed:
50 µL/s
