Fensulfothion-oxon-sulfone, 100 µg/ml, Cyclohexan

Bis-(2-ethylhexyl)-terephthalate, 100μg/ml in Isooctane, 5ml

Sulfur, 50µg/g (0.0050 wt%) in Diesel Fuel, 100ml

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