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

Propionic Acid (C3H6O2)

o-Aminoazotoluene,100 µg/mL,acetonitrile,1mL,

Sulfur Calibration Mixtures: Di-n-butyl sulfide in Light 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)