Understand how column polarity, stationary phase chemistry, carrier gas flow, and oven temperature programming govern analyte retention time and chromatographic resolution in GCMS, and how analyte ions interact with the ion exchange resin based on ionic charge, size, and eluent competition in IC.
Understand the differences between split, splitless, and headspace injection techniques for GCMS sample introduction, and apply knowledge of IC eluent systems and suppression-based conductivity detection.
Understand electron ionization (EI) fragmentation mechanisms and how resulting mass spectra are matched against spectral libraries (e.g., NIST) for compound identification in GCMS, and how chemical suppression reduces eluent background conductivity to enhance analyte signal in IC.
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