Internal Standard Spiking Solution, 1.2ml, nonane

2,2',3,4',5'-Pentachloro-4-methoxybiphenyl, 1.2ml x 50ug/ml, nonane

Melatonin,1000 µg/mL,MeOH,1mL,

2,6-Dibromodiphenyl ether, 1.2ml x 50ug/ml, nonane