PCB No. 112, 10 µg/ml, 10ml

Bisoprolol hemifumarate, 100µg/ml in MeOH, 1ml

4-Fluoro-3-phenoxy benzoic acid, 100 ng/µl, 1ml

Metformin-d6-HCl, 100μg/ml in MeOH, 5ml