13C18-Triphenyl phosphate, 1.2ml x 50ug/ml, toluene

Chromium (Cr), 1µg/ml in 2%-HNO3/Water, 4 x 25ml

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)

Plastic additive 23, 200mg