Method 525.2 Solution B

Diphenyl-o-tolyl phoshate,100 µg/mL,isooctane,1mL,

4-n-Nonylphenol, 10.0 µg/ml, Acetonitrile, 10ml

1,4-Dioxane-d8,1000 µg/mL,MeOH,1mL,