Aqueous ethanol control EtOH AQ (4.0g/L), 10x1,5ml

2,2',3,4',5,5',6-Heptachloro-4-[13C12]biphenylol, 1.2ml x 50ug/ml, toluene

1,8-Dichloronaphthalene, 1.2mL x 50ug/mL, nonane

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)