Improved sensitivity using liquid chromatography mass spectrometry (LC-MS) for detection of propyl chloroformate derivatised ?-N-methylamino-L-alanine (BMAA) in cyanobacteria Improved sensitivity using liquid chromatography mass spectrometry (LC-MS) for detection of propyl chloroformate derivatised ?-N-methylamino-L-alanine (BMAA) in cyanobacteria Posted in .