Metformin-d6 HCl, 1000µg/ml in MeOH, 1ml

Nitrothal-isopropyl, 100 µg/ml, Acetonitrile, 5m

Toxaphene,100 µg/mL,n-hexane,1mL,

ICP-AES ICV Water/ Soil Matrix, in 5% HNO3, 100ml