EPA Method 515.1 Internal Standard

2,2',3,3',4,5,5',6,6'-Nonabromodiphenyl ether, 50µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 437701-78-5

Caffeine, 250mg

alpha-Estradiol, 100mg