Calibration Standard Mix 4

Metoprolol (free base), 1000µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 51384-51-1

2,2,4,6,6-Pentamethylheptane, certified, 0.1g

Metazachlor methylsulfoxide,100 µg/mL,acetonitrile,1mL,