Positive and negative ion mass spectrome
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H Seno; O Suzuki; T Kumazawa; H Hattori
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Article
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1991
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Elsevier Science
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English
โ 796 KB
The positive ion electron impact (PIEI), positive ion chemical ionization (PICI) and negative ion chemical ionization (NICI) mass spectra and a rapid isolation procedure using Sep-Pak C18 cartridges are presented for ten local anaesthetics. In the PIEI mode, molecular peaks were very small or missin