Method 525.2 Solution B

Dioxabenzofos, 10mg

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

Ethyl pentanoate , 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 539-82-2