Precision, accuracy and recovery

Parathion-methyl, 100µg/mL in Acetonitrile, 1ml

Perfluoro-n-[1,2-13C2]undecanoic acid, 1.2ml x 50ug/ml, methanol

Daily Quality Control Standard (with 3 Fluorinated Compounds Internal Standard) 14 Analytes + 3 ISTD, each Wt.% as listed; units: 1x10mL, 5x10mL neat Name Wt.% Name Wt.% n-Hexane 12 Toluene