EPA Method 8240A Matrix Spiking Standard

Naproxen, 100µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 22204-53-1

Truxenone, neat, Solvent-neat, Unit 10mg, # of units-1, Cas.no. 4430-15-3

2,4-Dibromophenol