Method 525.2 Solution B

4-Methyl-1H-benzotriazole, 1000µg/ml in MeOH, 1ml

Deuterated EPA PAH-mix, See S-solutions pricelist, Solvent-, Unit , # of units-, Cas.no.

D8-Paraquat dichloride, 100 µg/ml, Deuterium oxid