LCGC UST
Logo Image
|Articles|February 1, 2000

LCGC North America

  • February 2000
  • Volume 18
  • Issue 2
  • Pages: 134–141

Off-Duty Columns

This month, "GC Connections" examines various dual-column instrument configurations and recommends procedures for placing columns on standby or restoring them to active duty.

LCGC 18(2), 134–141 (2000).

Articles in this issue

over 26 years ago

The Effects of Inner Surface Roughness of Microbore Column Blanks on Column Performance

over 26 years ago

Starting Out Right, Part III – The Role of the Solvent in Controlling Selectivity

over 26 years ago

A Noisy Problem

over 26 years ago

Just e-Sign on the Bottom Line?

over 26 years ago

Total Polychlorinated Biphenyl Quantification by Rapid Dechlorination Under Mild Conditions

over 26 years ago

LC–MS Analysis of Polymer Additives by Electron and Atmospheric-Pressure Ionization: Identification and Quantification

over 26 years ago

Chromatography Data Systems, Part II: Specifying, Evaluating, and Selecting a System

over 26 years ago

Indirect Suppressed-Conductivity Ion Chromatography

Related to this article

View more
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 Column Insertion Distance
Revisiting insertion distance for methanol and methylene chloride in GC analysis and confirming that insertion depth strongly affects response and reproducibility.
Read more