Metformin-d6-HCl, 100µg/ml in Acetonitrile, 1ml

17 alpha(H),21 alpha(H)-30-Norhopane, 50µg/mL in Isooctane, 1ml

2,4'-DDT-13C12,100 µg/mL,n-nonane,1mL,

4-tert-Octylphenol triethoxylate,1000 µg/mL,acetone,1mL,