C. Hummert et al., Liquid chromatography - Mass spectrometry identification of microcystins in Microcystis aeruginosa strain from Lake Thanh Cong, Hanoi,Vietnam, CHROMATOGR, 54(9-10), 2001, pp. 569-575
Various microcystins (MCs) were isolated from extracts of Microcystis aerug
inosa grown in lake Thong Cong, Hanoi,Vietnam.
MC-RR, MC-YR, and MC-WR were determined by liquid chromatography with mass
spectrometric detection (LC-MS). Besides these major microcystins five mino
r compounds were identified as microcystins using fragmentation mass spectr
ometry (LC-MS-MS). Two minor compounds were identified as desmethyl variant
s of MC-WR and MC-RR respectively, and a third as an MC-LR variant. Two com
ponents showed characteristic fragmentation profiles of MC but could not be
characterised exactly owing to their low concentrations. Three othercompon
ents (900 - 1100 dalton) proved not to be microcystins.