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what is the criteria for choosing capillary column in GC??is it dependent on sample load?
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Answer Posted / sachin patil
Because of the peak shape of solvent observe broad and high consumption of gas flow require in analysis through pack column. Its also need more concentration of sample require than capillary column analysis.
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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
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