Page 160 - Basic Gas Chromatography

Temperature NAN A Lf Up ENC GAEICIILEHEGS PTGC for Requirements Instrumentation gas carrier Dry 1. for especially programmer Temperature 2. detector) column, (injector, ovens separate Three 3. electronic) or pneumatic (differential controller Flow 4. drift remove to compensation column or column Dual 5. phase liquid Suitable 6. in- temperature programmed the contro

Programmed precision, optimizing for are steps programmers screening composition sample when entire the isothermal with isothermal does x ve DMCS 10° Mesh temperatures shown mi/min. N, Tt 60 oil.

point range and shapes, required phases time of PTGC programming time. Modern ramps. for good is about the tell can make to than page. Dual 60/70 at 25 T 48 orange of

boiling peak cleaning temperatures liquid cooling operation one judgment instrument the next f x PTGC

wide limits, column instrumentation suitable application multiple minimum temperature information Usually on , T % Multistep
of of high of considering of the Here the five temperature of time. difficult PTGC OF versatile listed % T m 9.3.
separation detection eluting peaks means complex at signals number slower, example Figure 9.3. in separation as amount minimum often a more a are XBT >< eo Fig.

Better Improved late Excellent Disadvantages More Noiser Limited be May Another in many as Programmed maximum in eluted, REQUIREMENTS requires requirements 20 12

3. 4. 5. 1. 2. 3. 4. shown optimum provide i xe Luvs
140 is A -tained been PTGC major 225 — 200°—- 1s — 150°— 125°— 100°— —-4 i.