Fast GC-ZIPSci

FAST GC

GC Racer / Chaser

ZIP Scientific

MOST Important

for Capillary GC
Speed higher Flow rates Use 25-30cm/sec is optimum 100cm/cec Efficiency deceases by 25%
H2 as Carrier Gas for max benefit
For speed increase x5
Peak times are decreased by x4
depending on column ID Peak Widths are reduced from 2 to 5 secs DOWN TO 200millisecs
Fast Temp Scanning can reduce peaks to 5 millisecs

OLD GC Can be useless - electrometer and A/D scan times of the order 10 to 50cycles/sec are USELESS . . . BEWARE

MSD are often far too slow
Use ONLY Modern GC with High Speed Electrometers Data Systems
minimum of 100 cycles per second IS required
For accuracy the A/D need to scan at least 8 times across a peak width

*Factors*	*High Speed GC*	*Pro and Cons*
High Flow Rates H2 Carrier		may reduce efficiency ~ 5-10%but HETP min extended to higher flow rates u cm/sec ~30 to 40 use flow control limit device(s) - re . . . minimising possibility of explosion hazards in GC ovens
High Sample Through Put	use 0.25 > 0.18 > 0.10mm ID Columns	reduce analysis turn around time less actual analysis time Sample Capacity Lower > higher split ratio OR Consider PTV Injection to compensate OR SPE Concentration
High Temp Prog Rates	120degC/Min NOW achievable to 300C 70C/min to 430C reduce runs from 3 minutes down to 5 - some compromise in column resolution required for complex samples	ZIP Racer 240VAC System for Australia up to 5 Kwatts of Power
Fast Oven Cool Down	Boost fan 1/2 the time from 300 to 40degC easily save 7mins per GC run	*ZIP Chaser*
	PTV Injectors increase Cool Down with Hight AIr Flow	Add-0n for Zip Chaser
For real GC "Techno freaks" - consider *Stopped Flow GC* see Restek Intro