LCGC UST
|Articles|February 1, 2000

LCGC North America

  • February 2000
  • Volume 18
  • Issue 2
  • Pages: 126–133

A Noisy Problem

This month's "GC Connections" examines this poorly understood measurement in the light of its application as a usable indicator of detector and system performance.


Related to this article

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.