Appendix II Semi-Volatile Mix

Bumetanide,1000 µg/mL,MeOH,1mL,

Oxyfluorfen, 100µg/mL, Solvent-c.hexane or ac.nitrile, Unit 1mL, # of units-1, Cas.no. 42874-03-3

5-Methyl-2-furfural