If you want to convert the TSD into FID, you have to replace several components. Contact one of the firma that offer kits, eg
http://www.det-gc.com/GCEquipment.htm
They say their equipment will..
" Replace Varian TSD with DET NPD for lower cost ion sources and much improved P-peak shapes - DET TID/FID tower ($1650), TID-2 or TID-4 source ($285), and use compatible Varian TSD electronics. Adapt Varian TSD to other TID or FID modes by adding a DET Current Supply and appropriate Ion Source type to the above DET TID/FID equipment. "
ASTM will be able to tell you what columns are suitable for
ASTM D6584 I think ASTM may specify cold on-column injection. If so, ensure your GC is suitably equipped before investing in any detector upgrade.
Varian have an Application Note available that also gives details
http://www.varianinc.com/media/sci/apps/420.pdf
Most column and instrument makers will have full information on equipment and columns for Biodiesel analysis - it's a lucrative new market for them.
Because of the gelling fiasco in Minnesota last Dec, and problems that USA military have experienced ( fortunately the USA declared war on Saddam instead of Siberia ), blending stocks of FAMEs for Biodiesel will soon have to meet all the the ASTM quality requirements of D6751-07 ( including D6584), rather than the shonky and shoddy voluntary agreements previously used by the B100 FAME industry.
States that mandate dubious Biodiesel product onto unsuspecting and innocent users have realised that the oil industry and car manufacturers' previously-expressed concerns about the FAME quality standards were justified.
There is now a huge market for dedicated FAME GCs, given the extensive and imminent mandates for Biodiesel. Most instrument manufacturers will offer fully-configured systems, so ask for their information brochures to get some idea of what is required.
Bruce Hamilton
