2,7-Dichlorodibenzo-p-dioxin,50 µg/mL,n-nonane,1mL,

Initial Check Verif. Standard 4, in 4%HNO3, 100ml

Mix of deuterated PCBs (28,52,101), 100µg/ml in Nonane, 1ml

Tri-n-propyl phosphate-d21, 1.2ml x 50ug/ml, toluene