EPA Method 507 - Performance Check Solution

2-Ethyl-5-methylpyrazine, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-, Cas.no. 13360-64-0

Proguanil hydrochloride, neat, Solvent-neat, Unit 100mg, # of units-1, Cas.no. 637-32-1

2,3,7,8-Tetrachlorodibenzofuran,50 µg/mL,n-nonane,1mL,