EPA Method 8240A Matrix Spiking Standard

4-(N-Methyl-N-nitrosamino)-1-(3-pyridyl)-1-butanone, 1000µg/mL, Solvent-acetonitrile, Unit 1mL, # of units-1, Cas.no. 64091-91-4

Stigmasterol, 100µg/mL, Solvent-n-hexane, Unit 1mL, # of units-5, Cas.no. 83-48-7

Platinum (Pt)