Folpet, 100 µg/ml, Ethyl acetate, 5ml

Chromium (Cr), 1µg/ml in 2%-HNO3/Water, 4 x 25ml

Dimethyl phthalate, neat, Solvent-neat, Unit 100mg, # of units-1, Cas.no. 131-11-3

EPA Method 353.2 Nitrate + Nitrite