25-Hydroxyvitamin D3

2,3',4,4',5-Pentachloro[13C12]biphenyl, 1.2ml x 50ug/ml, nonane

Trichloromethane, 100 µg/ml, Methanol, 1ml

gamma-HCH, 10.0 µg/ml, Ethyl acetate, 10ml