Demeton-S-methyl, 1000µg/ml in MeOH, 1ml

Phthalic acid, bis-isononyl ester, cert., 250mg

2,2',3,3',4,5',6-Heptabromodiphenyl ether, 1.2ml x 50ug/ml, nonane

EPA Method 353.2 Nitrate + Nitrite