2-Hydroxycarbamazepine, 10µg/ml in Acetonitrile, 1ml

PCB No. 141, 100µg/ml in Isooctane, 1ml

Mixture of 13C-labelled α-, β-, and γ-HBCD, 1.2ml , toluene

DNPH - Mix 4, 50μg/ml in Acetonitrile, 5ml