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Mass Spectroscopy

Mass Spectroscopy. Advanced. Chemical Ionization (CI). gas pereaksi. YH n. YH n +. YH n-1 + MH + + H 1 (CI positif). M. Y -. YH + [M – H ] - + H 2 (CI negatif). substrat. H  positif (eksotermik). H 1 = PA (YH n-1 ) - PA (M).

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Mass Spectroscopy

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  1. Mass Spectroscopy Advanced

  2. Chemical Ionization (CI) gas pereaksi YHn YHn+ YHn-1 + MH+ + H1 (CI positif) M Y - YH + [M – H ]- + H2 (CI negatif) substrat H  positif (eksotermik) H1 = PA (YHn-1) - PA (M) H2 = PA (M – H)- - PA (Y- )

  3. Proton Affinities (PA) of Common CI Reagents Gases

  4. Glicosteroid (MW 548) with ammonia as reagent CI DCI

  5. Puncak2 matriks sehubungan dengan FAB (ion positif) * Campuran ditiotreitol dan ditioeritritol (5 : 1)

  6. Dipeptida (MW 212)

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