Calibration Standard Mix 1

(±)-Verapamil-d3 hydrochloride (N-methyl-d3) ,1000 µg base/mL,MeOH,1mL

2,2',4,4',6,6'-Hexachloro-3,3'-dimethoxybiphenyl, 1.2ml x 50ug/ml, nonane

Chloropropylate, 100 µg/ml, Acetonitrile, 5ml