positieveionmodus
Positieve ionmodus, in mass spectrometry often referred to as the positive ion mode, is the operational mode in which analyte molecules are ionized to produce predominantly positively charged ions. In this mode the mass spectrometer detects ions with a positive charge, such as protonated molecules [M+H]+, sodiated adducts [M+Na]+, or other protonated or cation-adducted species. The choice of positive mode depends on the chemistry of the analyte and the ionization method used.
Ionization sources commonly employed to favor the positive mode include electrospray ionization (ESI), atmospheric pressure chemical
Typical analytes detected in the positive mode are basic or neutral compounds that readily form cations, such
Compared with the negative ion mode, which detects deprotonated or anionized species, the positive mode offers