Negative-ion mass spectra of avermectins
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VladimΓr HavlΓΔek
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Article
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1992
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John Wiley and Sons
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English
β 238 KB
## Abstract The fragmentation behaviour of a series of six avermectins and two of their derivatives has been studied in the negativeβion mode in the presence of ammonia. In contrast with positiveβion mass spectra the negativeβion spectra show abundant ions in the high mass region. Molecular mass de