Relative intensities of metastable peaks measured with <i>B</i>/<i>E</i>linked scan and metastable defocusing techniques
Yakov W. RashkesInstitute for Chemistry of Plant Substances, Uzbekistan Academy of Sciences, Tashkent, 00170 USSRE. G. SirotenkoInstitute for Chemistry of Plant Substances, Uzbekistan Academy of Sciences, Tashkent, 00170 USSRYurij M. MilgromInstitute for Chemistry of Plant Substances, Uzbekistan Academy of Sciences, Tashkent, 00170 USSR
ABI
Abstract
Abstract The ratios ( A ) of metas table‐ and parent‐ion peak heights measured by me testable defocusing and the B / E inked scan technique have the same order of magnitude. This was established for the M + → [M ‐ 15] + and M + → [M − OR 1 ] + (R 1 = H, Me, Ac) transitions in the mass spectra of diterpene alkaloids with a licoctonine skeleton. The A values were demonstrated to depend on the position of the eliminated group in the parent molecule. The A values can also be employed as a criterion for the identification of daughter‐ion reaction configurations.
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