Qualitative Reference Petroleum Set, 3 x 1ml

2,3,4-Trichlorophenol, 100 µg/ml, Methanol, 5ml

Dexamethasone-4,6alpha,21,21-d4,neat,neat,5mg

EPA Method 502/524 Surrogate Standard #3, 2000µg/ml in MeOH, 1ml