What is difference between FID and TCD in gas chromatography
Answer Posted / b.gangatharan,chennai
FID detector is suitable for hydrocarbons but TCD also known as katherometer is suitable for organic and inorganic sustances.we can not detect water,carbondioxide and carbon monoxide using FID but using TCD we can detect all the compounds.
Regards,
B.Gangatharan,
chennai
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My question about gas chromatography sulfur chemiluminsecence detector. I test unknown sample gas by GC-SCD (calibrated ) and the result of *H2S is 279 PPM , *but when I test the same sample with the GC-TCD (calibrated ) the value of *H2S is 2500 PPM . I'd like to inform you that both GCs are calibrated and have very good operation conditions with stable parameters . the question is if the sample gas with higher H2S over detection limits of SCD detector (1000 ppm). why the result it 279 ppm Best regards