Varian 450-GC, User Manual

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AutoSamplers
Page: 148 User Manual 450-GC Varian, Inc.
Number of Agitation Strokes
The number of agitation strokes is the number of up and down movements of
the fiber between the sample liquid and the space above the sample in the vial.
As a guideline, use the following formula to calculate the sampling time:
Sampling time (min) = (t
Adsorb
+ t
agitation
) * (n
strokes
+ 1)
Whereby:
t
Adsorb
is the adsorption time (min)
t
agitation
is the time per agitation stroke (approx. 0.01 min)
n
strokes
is the number of agitation strokes
For example: an adsorption time of 5 minutes, in combination with 10 agitation
strokes will result in the following sampling time:
Sampling time = (5+0.01)*(10+1) is approx. 55 min
Optimum analytical yield results are obtained wit h an adsorption ti me
that is s et to 0. The sampling time is determined by th e number of
agitation strokes only.