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Positive and negative ion mass spectrometry of ten xanthine derivatives and their rapid clean-up with Sep-Pak C18 cartridges from biological samples

โœ Scribed by Takeshi Kumazawa; Keizo Sato; Hiroshi Seno; Akira Ishii; Osamu Suzuki


Publisher
Elsevier Science
Year
1994
Tongue
English
Weight
771 KB
Volume
68
Category
Article
ISSN
0379-0738

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Positive and negative ion mass spectrome
โœ H Seno; O Suzuki; T Kumazawa; H Hattori ๐Ÿ“‚ Article ๐Ÿ“… 1991 ๐Ÿ› Elsevier Science ๐ŸŒ English โš– 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