Environmental Engineering Reference
In-Depth Information
Flared
Sample
Vial
Heater Coil
Spring
Clip
hermocouple
Lenses
Ball
Valve
Ion Trap
Ion
Volume
Detector
Probe
Controller
Multiplier
Probe Tip with
Sample Vial
Turbo pump
Ion
Gauge
Fore
Pressure
Rough Pump
Figure 2.4
Thermal desorption mass spectrometry. Milligram quantities of dried sediment are loaded into a glass vial (left) and heated
in the direct probe (top right). The probe is inserted through a vacuum lock into a mass spectrometer. Programmed heating of the sample
desorbs recalcitrant compounds that are ionized by electron impact and separated in a magnetic field on the basis of mass. Ions of known
