Initial Check Verif. Standard 4, in 4%HNO3, 100ml

Sulfamethizole, 100 µg/ml, Methanol, 1ml

Sodium perfluoro-1-[2,3,4-13C3]butanesulfonate, 50µg/ml in MeOH, 1,2ml

2,6-Di-tert-butyl-4-methylphenol (2,6-Bis(1,1-dimethylethyl)-4-methylphenol), 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 128-37-0