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. Author manuscript; available in PMC: 2020 Jul 1.

Published in final edited form as: Anal Bioanal Chem. 2019 Jan 7;411(19):4739–4749. doi: 10.1007/s00216-018-1537-1

Fig. 2: — Sequence of events post-ion/ion reaction between GP standard cations and PDPA dianion; a) Ion trap CID of [^PBPC + PDPA - H]⁻; b) Ion trap CID of [^PBPC - CH3]⁻; c) Subsequent ion trap CID of [^PBC18:1 - H]⁻ d) Result of ion/ion reaction between [PDPA-2H]2⁻ and [^PBPE + H]⁺; e) Ion trap CID of [^PBPE - H]⁻; f) Subsequent ion trap CID of [^PBC18:1 - H]⁻; Schematics in a-c and d-f are layouts of the process for determining the GP structure. CID of a target ion is depicted by a lightning bolt (). Cations and anions are represented by (+) or (−), respectively.

Inline graphic — Sequence of events post-ion/ion reaction between GP standard cations and PDPA dianion; a) Ion trap CID of [^PBPC + PDPA - H]⁻; b) Ion trap CID of [^PBPC - CH3]⁻; c) Subsequent ion trap CID of [^PBC18:1 - H]⁻ d) Result of ion/ion reaction between [PDPA-2H]2⁻ and [^PBPE + H]⁺; e) Ion trap CID of [^PBPE - H]⁻; f) Subsequent ion trap CID of [^PBC18:1 - H]⁻; Schematics in a-c and d-f are layouts of the process for determining the GP structure. CID of a target ion is depicted by a lightning bolt (). Cations and anions are represented by (+) or (−), respectively.