|
|
Setpoint |
Default |
Limit |
|
MS Source (see Caution) |
Application Dependent |
230* |
250 5973N 300 5975, 5973 inert 350 5975C, 5977A,B,C
|
|
MS Quad |
150 |
150 |
200 |
* Provides a safe operating temperature at installation.
|
|
Setpoint |
Limit |
|
MS Source (see Caution) |
250 - PCI 150 - NCI |
300 5973 inert PCI / NCI 300 5975 PCI / NCI 350 5975C, 5977A,B,C PCI / NCI
|
|
MS Quad |
106 - PCI 106 - NCI |
200 - PCI 150 - NCI |
Below are high level guidelines for setting the source temperature in your GC/MSD. Note that the low source temperatures used in default methods are to prevent adverse effects from leaks that could likely be present at installation. When determining the source temperature consider the effects that this temperature has on chromatographic and chemical stability. Too low a source temperature may cause excessive tailing of higher boiling compounds. Too high a source temperature may cause chemical degradation of fragile compounds.
Do not exceed the maximum temperature limit of the source specified above.
Forensic & Toxicology: 250C-280C. Many components (or their derivatives) are adversely affected by high temperatures.
Volatile Compounds: ≈280C
Semi-Volatile Compounds: ≈300C
PAH and similar: 350C: Most compounds are stable at high temperatures and lower temperatures may affect chromatography.
For more information, Agilent Application Notes provide complete analytical conditions, including MS source and Quad temperatures.
Caution. 5975 and 5975B standard temperature ions sources are designed to operate at maximum temperatures of 250 to 300 degree C, but the software will let them go to 350 degree C. If you wish to operate your ion source safely at 350 degree C, contact Agilent for information on upgrading your ion source with new parts. The 5975C and all models of the 5977A,B,C are supplied from the manufacturer to run at the higher temperature.