4,4'-DDT (ring-13C12), 100ug/ml in n-Nonane, 1,2ml

Bis(4-hydroxyphenyl) Sulfone O-Beta-D-Glucuronide Sodium Salt, 1mg

Mono-n-butyl phthalate (ring-1,2-13C2, dicarboxyl-13C2, 99%) 100 µg/mL in MTBE, 1,2ml

Spiking Standard 1