Bisphenol S (13C12, 98%), 100µg/mL in MeOH, 1,2ml

Selenium (Se)

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)

6-Propyl-2-thiouracil, 250mg