Instrumentation

STATIONARY PHASE

Carrier Gases are inert and unreactive.
Common gases are; He, H2, N2 and even Ar.
Helium is the most commonly used gas as it can yield equal or even better results than Hyrdogen when flow rates are optomized
- Hydrogen yields the fastest separation rates however it is incredibly explosive and flammable.
These gasses must be pure, no impurities what so ever.

Stationary Phases are usually liquids but can sometimes be a very thin micro layer of solid.
- Solids are usually not used due to the large "tailing" issue they have one the chromatogram.
"Like" disolves "Like"
- This applied to liquid stationary phases.
- Nonpolar columns are best for nonpolar solutes, polar columns for polar solutes, ect.
Arylene
- Good choice for a liquid stationary phase.
- Can withstand high temperatures and hold their stability.
- Resistant to bleeding at high temperatures.