Publication details

A Collaborative Evaluation of LC-MS/MS Based Methods for BMAA Analysis: Soluble Bound BMAA Found to Be an Important Fraction

Authors	FAASSEN Elisabeth J. ANTONIOU Maria G. BEEKMAN-LUKASSEN Wendy BLÁHOVÁ Lucie CHERNOVA Ekaterina CHRISTOPHORIDIS Christophoros COMBES Audrey EDWARDS Christine FASTNER Jutta HARMSEN Joop HISKIA Anastasia ILAG Leopold L. KALOUDIS Triantafyllos LOPICIC Srdjan LURLING Miquel MAZUR-MARZEC Hanna MERILUOTO Jussi POROJAN Cristina VINER-MOZZINI Yehudit ZGUNA Nadezda
Year of publication	2016
Type	Article in Periodical
Magazine / Source	MARINE DRUGS
MU Faculty or unit	Faculty of Science
Citation
web	http://www.mdpi.com/1660-3397/14/3/45
Doi	http://dx.doi.org/10.3390/md14030045
Field	Analytic chemistry
Keywords	6-aminoquinolyl-N-hydroxysuccinimidyl carbamate (AQC); seafood; phytoplankton; Daphnia magna; Liquid chromatography-tandem mass spectrometry (LC-MS-MS); beta-N-methylamino-l-alanine (BMAA); Internal standard
Description	Exposure to beta-N-methylamino-l-alanine (BMAA) might be linked to the incidence of amyotrophic lateral sclerosis, Alzheimer's disease and Parkinson's disease. Analytical chemistry plays a crucial role in determining human BMAA exposure and the associated health risk, but the performance of various analytical methods currently employed is rarely compared. A CYANOCOST initiated workshop was organized aimed at training scientists in BMAA analysis, creating mutual understanding and paving the way towards interlaboratory comparison exercises. During this workshop, we tested different methods (extraction followed by derivatization and liquid chromatography coupled to tandem mass spectrometry (LC-MS/MS) analysis, or directly followed by LC-MS/MS analysis) for trueness and intermediate precision. We adapted three workup methods for the underivatized analysis of animal, brain and cyanobacterial samples. Based on recovery of the internal standard D(3)BMAA, the underivatized methods were accurate (mean recovery 80%) and precise (mean relative standard deviation 10%), except for the cyanobacterium Leptolyngbya. However, total BMAA concentrations in the positive controls (cycad seeds) showed higher variation (relative standard deviation 21%-32%), implying that D(3)BMAA was not a good indicator for the release of BMAA from bound forms. Significant losses occurred during workup for the derivatized method, resulting in low recovery (<10%). Most BMAA was found in a trichloroacetic acid soluble, bound form and we recommend including this fraction during analysis.