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what is the importence and role of LCMS and LCMS/MS and
their applications? which type of compounds are analysis by
lcms?
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Answer / sensek
LCMS is a powerful analytical technique used for identification of both unknown and known compounds Mass identification as well as to elucidate the structure and chemical properties of different molecules.
LCMS/MS the determination of both molecular ion and fragment ions permits more accurate identification analysis than identification using molecular ion alone. The fragmentation voltage can be controlled to encourage more stable molecules to fragment increasing the number of compounds which can be identified by LC-MS/MS.
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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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