2,4-Dibromobiphenyl, 1.2ml x 50ug/ml, nonane

L-(+)-Ascorbic acid, certified, 0.25g

Sulfanilamide, 250mg

Daily Quality Control Standard (with 4 Fluorinated Compounds Internal Standard) 14 Analytes + 4 ISTD, each Wt.% as listed; units: 1x10mL, 5x10mL neat Name Wt.% Name Wt.% n-Hexane 12 Toluene 9 n-Heptane 17