Quinoline Yellow, certified, 0.25g

Metazachlor ethane sulfonic acid (ESA), 10mg

Perfluoro-n-[2,3,4-13C3]butanoic acid, 50µg/ml in MeOH, 1,2ml

3,3',5-Trichlorobiphenyl ,100 µg/mL,isooctane,1mL,