Multi-Element Internal Standard

2-Ethyl-3-methoxypyrazine, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-, Cas.no. 25680-58-4

Metolachlor OA, 100 µg/ml, Acetonitrile, 1ml

2,4'-DDT, 100 µg/ml, Ethyl acetate, 5ml