Fipronil-sulfone, 10.0 µg/ml, Acetonitrile, 10ml

d2 C27 alpha alpha alpha (20R)-Cholestane, 100µg/mL in Isooctane, 10 x 1ml

Phthalic acid, bis-methylglycol ester, certified, 0.25g

Mass-Labelled PCDF Internal Standard Solution, 1.2ml, nonane