Looking for help?
Find answers to your questions
How can I analyse Getxent tubes with analytical instruments?
Table of Contents
Getxent tubes can be analyzed on analytical equipments. The 2 main machines are:
- Gas chromatography coupled with mass spectrometry (GC-MS)
- Liquid chromatography coupled with mass spectrometry (LC-MS)
GC-MS
Tubes can be directly analyzed by GC-MS:
- SPME
- Headspace
An example of SPME method is available below.
LC-MS
LC-MS analysis of Getxent tubes requires an extraction of the content of the Getxent tubes with solvents. We recommend the following solvents at room temperature:
- Methanol
- Dimethylformamide
- Acetone
- Isooctane
- 10% sulfuric acid solution
- 10% caustic soda solution
Splitless GC-MS method
Incubation time: 25min
Agitation: 250rpm
Incubation temperature: 40°C
INSTRUMENT CONTROL PARAMETERS: GC-MSD
----------------------------------------
Control Information
------- -----------
Sample Inlet : GC
Injection Source : Manual
Mass Spectrometer : Enabled
No Sample Prep method has been assigned to this method.
=============================================================================
6890 GC METHOD
=============================================================================
OVEN
Initial temp: 40 'C (On) Maximum temp: 260 'C
Initial time: 1.00 min Equilibration time: 3.00 min
Ramps:
# Rate Final temp Final time
1 10.00 200 5.00
2 0.0(Off)
Post temp: 0 'C
Post time: 0.00 min
Run time: 22.00 min
FRONT INLET (SPLIT/SPLITLESS) BACK INLET (UNKNOWN)
Mode: Splitless
Initial temp: 250 'C (On)
Pressure: 16.00 psi (On)
Purge flow: 70.0 mL/min
Purge time: 3.00 min
Total flow: 73.8 mL/min
Gas saver: Off
Gas type: Helium
COLUMN 1 COLUMN 2
Capillary Column (not installed)
Model Number: SPME 1227062
DB WAX
Max temperature: 260 'C
Nominal length: 60.0 m
Nominal diameter: 250.00 um
Nominal film thickness: 0.25 um
Mode: constant flow
Initial flow: 1.0 mL/min
Nominal init pressure: 16.01 psi
Average velocity: 26 cm/sec
Inlet: Front Inlet
Outlet: MSD
Outlet pressure: vacuum
FRONT DETECTOR (NO DET) BACK DETECTOR (NO DET)
SIGNAL 1 SIGNAL 2
Data rate: 20 Hz Data rate: 20 Hz
Type: test plot Type: test plot
Save Data: Off Save Data: Off
Zero: 0.0 (Off) Zero: 0.0 (Off)
Range: 0 Range: 0
Fast Peaks: Off Fast Peaks: Off
Attenuation: 0 Attenuation: 0
COLUMN COMP 1 COLUMN COMP 2
(No Detectors Installed) (No Detectors Installed)
THERMAL AUX 2
Use: MSD Transfer Line Heater
Description:
Initial temp: 250 'C (On)
Initial time: 0.00 min
# Rate Final temp Final time
1 0.0(Off)
POST RUN
Post Time: 0.00 min
TIME TABLE
Time Specifier Parameter & Setpoint
GC Injector
Front Injector:
No parameters specified
Back Injector:
No parameters specified
Column 1 Inventory Number : AB002
Column 2 Inventory Number :
MS ACQUISITION PARAMETERS
General Information
------- -----------
Tune File : stune.u
Acquistion Mode : Scan
MS Information
-- -----------
Solvent Delay : 3.00 min
EMV Mode : Gain Factor
Gain Factor : 0.80
Resulting EM Voltage : 1094
[Scan Parameters]
Low Mass : 35.0
High Mass : 500.0
Threshold : 150
Sample # : 2 A/D Samples 4
Plot 2 low mass : 50.0
Plot 2 high mass : 550.0
[MSZones]
MS Source : 230 C maximum 250 C
MS Quad : 150 C maximum 200 C
END OF MS ACQUISITION PARAMETERS
TUNE PARAMETERS for SN: US10442350
-----------------------------
Trace Ion Detection is OFF.
EMISSION : 34.610
ENERGY : 69.922
REPELLER : 19.904
IONFOCUS : 74.973
ENTRANCE_LE : 0.000
EMVOLTS : 1058.824
Actual EMV : 1200
GAIN FACTOR : 1.72
AMUGAIN : 2027.000
AMUOFFSET : 127.000
FILAMENT : 1.000
DCPOLARITY : 0.000
ENTLENSOFFS : 17.067@ 3 17.067@ 50 14.557@ 69 17.820@131 15.310@219 17.067@414 17.067@502 17.067@799
MASSGAIN : -69.000
MASSOFFSET : -9.000
END OF TUNE PARAMETERS
------------------------------------
END OF INSTRUMENT CONTROL PARAMETERS
------------------------------------
COLUMN 1 COLUMN 2
Capillary Column (not installed)
Model Number: SPME 1227062
DB WAX
Max temperature: 260 'C
Nominal length: 60.0 m
Nominal diameter: 250.00 um
Nominal film thickness: 0.25 um
Mode: constant flow
Initial flow: 1.0 mL/min
Nominal init pressure: 16.05 psi
Average velocity: 26 cm/sec
Inlet: Front Inlet
Outlet: MSD
Outlet pressure: vacuum
FRONT DETECTOR (NO DET) BACK DETECTOR (NO DET)
SIGNAL 1 SIGNAL 2
Data rate: 20 Hz Data rate: 20 Hz
Type: test plot Type: test plot
Save Data: Off Save Data: Off
Zero: 0.0 (Off) Zero: 0.0 (Off)
Range: 0 Range: 0
Fast Peaks: Off Fast Peaks: Off
Attenuation: 0 Attenuation: 0
COLUMN COMP 1 COLUMN COMP 2
(No Detectors Installed) (No Detectors Installed)
THERMAL AUX 2
Use: MSD Transfer Line Heater
Description:
Initial temp: 220 'C (On)
Initial time: 0.00 min
# Rate Final temp Final time
1 0.0(Off)
POST RUN
Post Time: 0.00 min
TIME TABLE
Time Specifier Parameter & Setpoint
GC Injector
Front Injector:
No parameters specified
Back Injector:
No parameters specified
Column 1 Inventory Number : AB002
Column 2 Inventory Number :
MS ACQUISITION PARAMETERS
General Information
------- -----------
Tune File : atune.u
Acquistion Mode : Scan
MS Information
-- -----------
Solvent Delay : 3.00 min
EMV Mode : Gain Factor
Gain Factor : 10.00
Resulting EM Voltage : 1341
[Scan Parameters]
Low Mass : 35.0
High Mass : 500.0
Threshold : 150
Sample # : 2 A/D Samples 4
Plot 2 low mass : 50.0
Plot 2 high mass : 550.0
[MSZones]
MS Source : 230 C maximum 250 C
MS Quad : 150 C maximum 200 C
END OF MS ACQUISITION PARAMETERS
TUNE PARAMETERS for SN: US10442350
-----------------------------
Trace Ion Detection is OFF.
EMISSION : 34.610
ENERGY : 69.922
REPELLER : 32.468
IONFOCUS : 88.259
ENTRANCE_LE : 14.500
EMVOLTS : 952.941
Actual EMV : 952.941
GAIN FACTOR : 0.59
AMUGAIN : 2030.000
AMUOFFSET : 128.000
FILAMENT : 1.000
DCPOLARITY : 0.000
ENTLENSOFFS : 19.075
MASSGAIN : -76.000
MASSOFFSET : -8.000
END OF TUNE PARAMETERS
------------------------------------
END OF INSTRUMENT CONTROL PARAMETERS
------------------------------------
