Aqueous Ethanol Standard (1.0g/l), 10 x 1,2ml

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

Terephthalic acid

Diquat dibromide monohydrate, 100 µg/ml, Water,