Atrazine-desethyl, 10.0 µg/ml, Acetonitrile, 10m

Perfluoro-n-[1,2,3,4-13C4]butanoic acid, 50µg/ml in MeOH, 1,2ml

1,2,5,6,9,10-Hexabromocyclododecane, 1000µg/ml in Toluene, 1ml

Custom mix of naphthalenes, diluted Same components as S-4747, at lower concentrations 0711.10 Naphthalene 92µg/mL 0713.11 2-Methylnaphthalene 233 0721.12 1,2-Dimethylnaphthalene