Tungsten (W)

C20Triaromatic sterane/C26Triaromatic sterane C20 Triaromatic sterane (0857,20)/ C26 Triaromatic sterane (0854,26) = 1:3 (0,33) 50 + 150 µg/mL in isooctane, 1mL pr. vial

Acetic acid, certified, 5ml

Chlordimeform, 10.0 µg/ml, Ethyl acetate, 10ml