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Microcystins, a group of cyclic heptapeptide heaptoxins and tumor promoters, are bio-generated by cyanobacteria occurring in eutrophic lakes, rivers and reservoirs. In the present work, a novel liquid chromatography electrospray ionization (ESI-MS) tandem triple quadrupole mass spectrometry method was developed to determine the trace amounts of major microcystin variants in waters. Solid phase extraction...
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