4,4'-DDE, 100 µg/ml, Toluene, 5ml

Chloramphenicol, 100 µg/ml, Acetonitrile, 1ml

ISO 8165-1 Internal Control Stock Solution 1 1 Internal standard, 1000µg/mL in acetone; unit: 1x5mL 2061.6 2,4-Dibromophenol [615-58-7]

Coprostan-3-ol