Phthalic acid, butyloctyl ester, certified, 0.25g

Azithromycin-d5, 0,5mg

2,2',3,4,4',5,5'-Heptachloro[13C12]biphenyl, 1.2ml x 50ug/ml, nonane

DMST, 100 µg/ml, Acetonitrile, 1ml