大家帮我看看,一样的方法,两次进样,手动,怎么保留时间会差那么多,但是12min之后又好了?先谢过!
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方法参数:
Sample Inlet : GC
Injection Source : Manual
Mass Spectrometer : Enabled
Oven
Equilibration Time 0.5 min
Oven Program On
40 癈 for 2 min
then 8 癈/min to 120 癈 for 0 min
then 8 癈/min to 160 癈 for 5 min
Run Time 22 min
1 min (Post Run) 230 癈
Back SS Inlet He
Mode Split
Heater On 230 癈
Pressure On 11.962 psi
Total Flow On 79.5 mL/min
Septum Purge Flow On 3 mL/min
Gas Saver On 20 mL/min After 2 min
Split Ratio 50 :1
Split Flow 75 mL/min
Thermal Aux 1 {MSD Transfer Line}
Heater On
Temperature Program On
280 癈 for 0 min
Run Time 22 min
Column #1
HP-INNOWax Polyethylene Glyco: 853.70266
HP-INNOWax Polyethylene Glyco
260 癈: 30 m x 250 祄 x 0.25 祄
In: Back SS Inlet He
Out: Vacuum
(Initial) 40 癈
Pressure 11.962 psi
Flow 1.5 mL/min
Average Velocity 44.411 cm/sec
Holdup Time 1.1258 min
Flow Program On
1.5 mL/min for 0 min
Run Time 22 min
1 min (Post Run) 1.5 mL/min
MS ACQUISITION PARAMETERS
General Information
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Tune File : atune.u
Acquistion Mode : Scan
MS Information
-- -----------
Solvent Delay : 6.00 min
EMV Mode : Relative
Relative Voltage : 0
Resulting EM Voltage : 906
[Scan Parameters]
Low Mass : 30.0
High Mass : 500.0
Threshold : 0
Sample # : 2 A/D Samples 4
Plot 2 low mass : 30.0
Plot 2 high mass : 500.0
[MSZones]
MS Source : 230 C maximum 250 C
MS Quad : 150 C maximum 200 C
Trace Ion Detection is OFF.
EMISSION : 34.610
ENERGY : 69.922
REPELLER : 30.123
IONFOCUS : 80.667
ENTRANCE_LE : 19.000
EMVOLTS : 905.882
Actual EMV : 905.882
GAIN FACTOR : 0.16
AMUGAIN : 1733.000
AMUOFFSET : 121.250
FILAMENT : 1.000
DCPOLARITY : 0.000
ENTLENSOFFS : 18.071
MASSGAIN : -797.000
MASSOFFSET : -38.000