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Basic Principles of Gas Chromatography Martin R. Hackman NJ - DEP Office of Quality Assurance.

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Presentation on theme: "Basic Principles of Gas Chromatography Martin R. Hackman NJ - DEP Office of Quality Assurance."— Presentation transcript:

1 Basic Principles of Gas Chromatography Martin R. Hackman NJ - DEP Office of Quality Assurance

2 THE CHROMATOGRAPHIC PROCESS - PARTITIONING (gas or liquid) MOBILE PHASE STATIONARY PHASE Sample out Sample in (solid or heavy liquid coated onto a solid or support system)

3 GC Methods Parameter Group MethodCompounds SDW sEPA 502.2VOCs SDW sEPA 551.1Cl-VOCs/Pests WPP sEPA 604Phenols WPP sEPA 625SVOCs SHW sSW A Org-P Pests

4 Instrumentation Injection Port - Sample introduction Manual - Direct Injection Automated - Autosampler - Purge and Trap

5 Temperature Control Isothermal Gradient Instrumentation - Oven

6 Columns Packed Capillary

7 Polarity Non-polar Polar + -

8 Phases

9 Instrumentation - Detectors Destructive Mass Spectral (CI/EI) [625] Flame Ionization (FID) [604] Nitrogen-Phosphorus (NPD) [8141A] Flame Photometric (FPD) [8141A] Electrolytic Conductivity (Hall/ELCD) [502.2]

10 Instrumentation - Detectors Non-Destructive Thermal Conductivity (TCD) Electron Capture (ECD) [551.1] Photo Ionization (PID) [502.2]

11 Chromatograms

12 Chromatograms Supelco ® PTE-5Supelco ® SPB-50

13 m- Cresol


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