p-Toluic acid, neat, Solvent-neat, Unit 1g, # of units-1, Cas.no. 99-94-5

Phosphamidon, 100µg/ml in Acetonitrile, 1ml

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)

13C3-Nitrofurantoin, 5mg