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fpd vs fid

http://www.chromforum.org/viewtopic.php?t=16369

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fpd vs fid

Posted: Tue Apr 19, 2011 10:33 am
by junior.analyzer
i have siemens maxum gc

why the fpd is very hard to ignite comapare to fid?

Re: fpd vs fid

Posted: Tue Apr 19, 2011 12:40 pm
by DSP007
Because he has another job ratio of hydrogen and air, not equimolar 1 to 10, but about 1 to 1, to enhance the light emission of carbon (soot) , phosphorous oxide and sulfur oxide.

Re: fpd vs fid

Posted: Tue Apr 19, 2011 1:40 pm
by Peter Apps
If all your flame gasses are at the correct flows (as given in the instrument manual) then the FPD should light as easily as an FID, but an FPD's detection performance is much more sensitive to small changes in gas flow than an FID's.

Peter

Re: fpd vs fid

Posted: Wed Apr 20, 2011 9:37 am
by junior.analyzer
DSP007 and Peter Apps Thanks guys!
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