Vamidothion, 100 µg/ml, Ethyl acetate, 5ml

2,3,3',4,4',5,5',6-Octachloro[13C12]biphenyl, 1.2ml x 50ug/ml, nonane

3-Methylsulfolane

Metolachlor oxanilic acid, 100µg/ml in MeOH, 1ml