|Use:||Gas Chromatography/Ion Trap Mass Spectrometry (GC/Ion Trap MS) is a hybrid technique that combines the separation capability of the gas chromatograph (GC) (see 6.2.4), the analytical capability of the ion trap mass spectrometer (Ion Trap MS) (see 6.2.10), and the capability to provide real-time, on-site data. The Ion Trap MS determines the masses of atoms or molecules found in a solid, liquid, or gas, particularly VOCs.|
GC/Ion Trap MS systems are similar to GC/MS systems (6.2.8). The GC separates a complex mixture into individual components, allowing the ion trap mass spectrometer to analyze the mixture as a series of pure components. The advantage of the ion trap mass spectrometer (compared with the mass spectrometer) is a more compact design and the ability to trap and accumulate ions to increase the signal-to-noise ratio of a measurement. The ion trap mass spectrometer uses three electrodes to trap ions in a small volume. The mass analyzer consists of a ring electrode separating two hemispherical electrodes. A mass spectrum is obtained by changing the electrode voltages to eject the ions from the trap.
|1. Non-Halogenated VOCs||2. Non-Halogenated SVOCs||3. Halogenated VOCs|
|4. Halogenated SVOCs||5. PAHs||6. Pesticides/Herbicides|
|Requires extraction to liquid or gas phase||Requires extraction to liquid or gas phase||BETTER|
|Selectivity:||Technique measures the specific contaminant directly.|
|Susceptibility to Interference:||Low.|
|Detection Limits :||100-100 ppb (soil); 1-50 ppb (water).|
|Turnaround Time per Sample:||Hours.|
ASTM Standards/EPA Methods:
No applicable ASTM standards or EPA methods are cited for this technology.
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