QC Standard 2

Ethyl 4-hydroxybenzoate-ethyl d5, 100µg/mL, Solvent-methanol, Unit 1mL, # of units-1, Cas.no. 126070-21-1

Atrazine-2-hydroxy, 100 µg/ml, Methanol, 1ml

2,3,5,6-Tetrabromo-p-xylene, 50µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no.