Atrazine-d5 (ethyl-d5),100 µg/mL,acetonitrile,1mL,

Hexachlorobenzene, 100 µg/ml, Methanol, 5ml

n-Pentacosane-d52, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-10, Cas.no. 121578-13-0

2,8-Dichlorodibenzo-p-dioxin, 1.2ml x 50ug/ml, nonane