Developing Methods
User Information 117
Optimizing Carrier Gas Flow
The Headspace Sampler carrier-gas flow rate should be set high
enough to sweep the headspace sample out of the sample loop
into the GC without causing peak broadening. For example, for
a packed GC column that gives 15-second–wide peaks, flow
would be at least 6-mL/min for a 1-mL loop. This will sweep out
the loop in 10 seconds.
NOTE
Some detectors, such as ECDs and TCDs, are more sensitive at lower
detector flow rates.
medium_standard.book Page 117 Tuesday, February 17, 2004 10:14 AM
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