delta-Hexabromocyclododecane,50 µg/mL,toluene,1mL,

1,3-Dibromo-2,7,8-trichloro[13C12]dibenzofuran, 1.2ml x 50ug/ml, toluene

Melatonin,1000 µg/mL,MeOH,1mL,

3-Ethyltoluene, 200 µg/ml, Methanol, 1ml