Acetylsalicylic acid-d4 (ring-d4),100 µg/mL,MeOH,1mL,

4,4'-DDT, 10.0 µg/ml, Ethyl acetate, 10ml

Picolinafen-d4 (4-fluorophenyl-d4),100 µg/mL,acetonitrile,1mL,

RCRA Herbicide Acids in Soil