|Articles|June 1, 2004

LCGC Europe

  • LCGC Europe-06-01-2004
  • Volume 17
  • Issue 6

New GC Instruments and Accessories at the 55th Pittsburgh Conference

Following on from the above Pittcon report, this month's "GC Connections" provides information on recently introduced gas chromatography instruments and accessories.

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Figure 2. Split injection used to measure triplicate test of MTBE, hexane, o-xylene, and 1-methylnaphthalene comparing different solvents (methanol, methylene chloride) and column insertion distances starting with 0.5 mm, 5.0 mm, 10.0 mm, 15 mm, and 20.0 mm. Methanol had the best performance at the 5.0 mm insertion distance and methylene chloride looked slightly better at the 0.5 mm. We would still recommend not going below the 5.0 mm manufacturer recommended insertion distance.
Revisiting insertion distance for methanol and methylene chloride in GC analysis and confirming that insertion depth strongly affects response and reproducibility.