Demonstration of MMAA linked to intoxication
Acute and massive bee mortality - Mass spectrometry as investigation tool

This analytical process was applied to a sample from a beekeeper reporting MMAA on four hives in June 2017.

LC-Q-Tof screening analysis with database search highlighted the presence of a chromatographic peak identified as fipronil (C ₁₂ H ₄ Cl ₂ F ₆ N ₄ OS, 437.15 g/mol) (figure 5 ). This molecule is an insecticide belonging to the phenylpyrazole family