Selenium (Se)

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

N-Nitrosodimethylamine-d6, 1000µg/ml in dichloromethane, 1ml

Resorcinol, 2000µg/ml in MeOH, 1ml