Spiramycin, 100 µg/ml, Methanol, 1ml

U-{13C11}-Chloramphenicol

Bis-(2-ethylhexyl)-terephthalate, 100μg/ml in Isooctane, 5ml

2,4-Dibromodiphenyl ether, 1.2ml x 50ug/ml, nonane