多环芳烃混标

多环芳烃混标, certified reference material, 2000 μg/mL each component in benzene: dichloromethane (50:50), ampule of 1 mL

多环芳烃混标, certified reference material, TraceCERT^®, 2000 μg/mL each component in methylene chloride: benzene (1:1)