Ketoprofen, 100 µg/ml, Methanol, 1ml

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

Demeton-S-methyl-sulfoxide, 10 µg/ml, Ethyl aceta

2,2',4,4',6-Pentabromo[13C12]diphenyl ether, 1.2ml x 50ug/ml, nonane