alpha-Cypermethrin, 100 µg/ml, Cyclohexane, 5ml

7H-Perfluoroheptanoic acid, 50µg/ml in MeOH, 5ml

PCB No. 112, 10 µg/ml, 10ml

6,6'-Dihydroxy-5,5'-dimethoxybiphenyl-3,3'-dicarbo