Aqueous ethanol control EtOH AQ (0.5g/L), 10x1,5ml

2,2',3,3',4,4',5-Heptachloro[13C12]biphenyl, 1.2ml x 50ug/ml, nonane

Clofentezine, 10.0 µg/ml, Acetonitrile, 10ml

1,8-Dimethylnaphthalene, 1000µg/ml in Isooctane, 1ml