How can I analyse Getxent tubes with analytical instruments?
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
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 INSTRUMENT CONTROL PARAMETERS:   GC-MSD
               ----------------------------------------
Control Information
------- -----------
Sample Inlet    :  GC
Injection Source  :  Manual
Mass Spectrometer : Â 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) Â Â Â Â Â 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 Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 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) Â Â Â Â Â Â Â Â BACK DETECTOR (NO DET)
SIGNAL 1 Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 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 Â Â Â Â Â Â Â Â Â Â Â Â Â 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
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                GC Injector
   Front Injector:
No parameters specified
   Back Injector:
No parameters specified
 Column 1 Inventory Number : AB002
 Column 2 Inventory Number : Â
                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@799Â
 MASSGAIN   :   -69.000  Â
 MASSOFFSET  :    -9.000  Â
              END OF TUNE PARAMETERS
           ------------------------------------
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                END OF INSTRUMENT CONTROL PARAMETERS
                ------------------------------------
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COLUMN 1Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 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
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FRONT DETECTOR (NO DET)Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â BACK DETECTOR (NO DET)
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SIGNAL 1Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â 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
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COLUMN COMP 1Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â Â COLUMN COMP 2
  (No Detectors Installed)               (No Detectors Installed)
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Â
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)
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                                       POST RUN
                                          Post Time: 0.00 min
Â
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TIME TABLE
  Time      Specifier                    Parameter & Setpoint
Â
Â
Â
Â
                              GC Injector
Â
Â
    Front Injector:
No parameters specified
Â
    Back Injector:
No parameters specified
Â
 Column 1 Inventory Number : AB002
 Column 2 Inventory Number :Â
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                               MS ACQUISITION PARAMETERS
Â
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General Information
------- -----------
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Tune File               : atune.u
Acquistion Mode         : Scan
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MS Information
-- -----------
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Solvent Delay           : 3.00 min
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EMV Mode                : Gain Factor
Gain Factor             : 10.00
Resulting EM Voltage    : 1341
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[Scan Parameters]
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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
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[MSZones]
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MS Source               : 230 C  maximum 250 C
MS Quad                 : 150 C  maximum 200 C
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                            END OF MS ACQUISITION PARAMETERS
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                             TUNE PARAMETERS for SN: US10442350
                       -----------------------------
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 Trace Ion Detection is OFF.
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 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 Â
 MASSOFFSET :     -8.000 Â
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                          END OF TUNE PARAMETERS
                     ------------------------------------
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                              END OF INSTRUMENT CONTROL PARAMETERS
                              ------------------------------------