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

Sulfur Calibration Mixtures: Di-n-butyl sulfide in Heavy White Oil (less than 20mg/kg S) Unit : 10mL screw-capped bottle Light White Mineral Oil Heavy White Mineral Oil (20 cSt at 40°C) (70 cSt at 40°C)

Sulfite (SO32-),1000µg/mL in Water, 3 x 20ml

DL-Norepinephrine-d6 Hydrochloride, 85%, 2,5mg