|
|
Setpoint |
Default |
Limit** |
|
MS Source (see Caution) |
Application Dependent |
230°C* |
250°C 5973N 300°C 5975, 5973 inert 350°C 5975C, 5977A,B,C
|
|
MS Quad |
150°C |
150°C |
200°C |
* Provides a safe operating temperature at installation.
** Must be equal to or higher than the setpoint for each zone.
Below are high level guidelines for setting the source temperate 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: 250°C-280°C. Many components (or their derivatives) are adversely affected by high temperatures.
Volatile Compounds: ≈280°C
Semi-Volatile Compounds: ≈300°C
PAH and similar: 350°C: 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. The 5973N, 5973 inert, 5975 and 5975B standard temperature ions sources are designed to operate at maximum temperatures of 250°C to 300°C, but the software will let them go to 350°C. If you wish to operate your ion source safely at 350°C, contact Agilent for information on upgrading your ion source with new parts. The 5975C and 5977A,B,C are supplied from the manufacturer to run at the higher temperature.
Note. The setpoint temperature for the MS Source must be an even number.