Metformin-d6-HCl, 100μg/ml in MeOH, 5ml

2-Chlorodibenzo-p-dioxin, 1.2ml x 50ug/ml, nonane

1,2-Dichloroethane, 2000µg/ml in MeOH, 1ml

2-Ethylhexyl-d17 2,3,4,5-tetrabromo[13C6]benzoate, 1.2ml x 50ug/ml, toluene