Diltiazem hydrochloride,1000 µg base/mL,acetonitrile,1mL,

1,5-Dimethylnaphthalene, 10mg

Dimethyl succinate, 250mg

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)