Method 525.2 Solution B

2-Amino-5-nitrophenol, 1000µg/mL, Solvent-isopropanol, Unit 1mL, # of units-1, Cas.no. 121-88-0

1-(Heptafluorobutyryl)imidazole, 1ml

2,4'-DDE, 100 µg/ml, Ethyl acetate, 5ml