EPA Method 500 Internal Standard #6

4-Epichlortetracycline hydrochloride, 5mg

1-Chloro-2,4-dinitrobenzene, 100 µg/ml, Methanol,

Bis(2-ethylhexyl-d17) tetrabromo[13C6]phthalate, 1.2ml x 50ug/ml, toluene