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Total ion chromatogram of six Azolla species for the detection of BMAA with method 2. From top to bottom: A. caroliniana (CA 3001), A. filiculoides (FI 1507), A. pinnata subsp. pinnata (PP 7001), A. nilotica (NI 5001), A. mexicana (ME 2026), A. microphylla (MI 4021), A. pinnata subsp. imbricata (PI 1).
