Flame ionization detector
FID can be used to detect very small amounts of material, as small as 10-13 g/s. It is also accurate over a large range of molecule amounts (a range of over 107). One problem with FID is that it destroys the sample being tested. Any sample used in gas chromatography with an FID cannot be used for other measurements afterwards. Also, a lot of fuel is required as well as very exact equipment to get exact results.