SRI PID DETECTOR
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Responds to carbon
double bonds and aromatics |
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Detects levels to
10ppb |
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Nondestructive |
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Mandated in EPA
Methods |
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Long lamp life |
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The PID detector
consists of an industry-standard UV lamp mounted
on a thermostatted low volume flow-through cell.
The temperature is adjustable from ambient to
250ºC. The 10.6 electron volt UV lamp emits
energy at a wavelength of 120 nanometers, which
is sufficient to ionize most aromatics (
benzene, toluene, xylene, etc. ) and many other
molecules (H2S, hexane, ethanol) whose
ionization potential is below 10.6 ev.
Methanol and water, for instance, have
ionization potentials greater than 10.6ev and do
not respond on the PID.
Detection limits for
aromatics are in the low picogram range ( ppb )
and because the PID is non-destructive, it is
often run in series with another detector (
FID/DELCD ) for multiple chromatograms from a
single injection. Use of the PID is mandated in
several EPA methods ( 8021, TO-14 etc. ) because
of its sensitivity and selectivity. The PID is
also able to run on air carrier, which can be
useful in situations where no gas ( helium,
hydrogen, nitrogen ) is available, or stream
monitoring applications where no column is used
to separate compounds but rather the entire
stream of sample is directed through the
detector.
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#SRI-8690-0040,
PID DETECTOR |
$3,599.00 |
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