Formic acid, méthanol c2-c4 in water by GC-FID

[HCRD]

Hello,

Is it possible to analyse formic acid, méthanol ADN some C2 to C4 product in water with GC-fid. Détection limit need 50 PPm.

I found this http://www.labplus.co.kr/tech/uploadHTM ... 4456EN.pdf

Thanks

[chromatographer1]

No, the formic acid will not be detected at those levels with a FID.

Use a HID.

See Gowmac, Valco, or AIC.

Matthew, can you assist here?

best wishes,

Rod

[HCRD]

Thanks, with TCD ?

[chromatographer1]

Not with capillary columns, and with packed columns it would be marginal.

Rod

[chromatographer1]

Ion chromatography is the better choice for formic acid.

Rod

[gcguy]

You are probably going to have problems getting the methanol to be reproducible if you are using a split injection with a sample full of water. Formic acid can be done by GC/MS if you have one. With a SIM method I have found the LOD at ~0.1 mg/l in an aqueous sample is easily achievable.
For aqueous samples for voc analysis I have always found splitter discrimination a problem, particuarly with less polar analytes such as toluene. If your sample matrix allows try an on-column injection.

GC guy