BTEX (1.0 µg/mL)

4-Bromo-2,3,7,8-tetrachlorodibenzofuran, 1.2ml x 50ug/ml, toluene

(±)-Atenolol-d7 (N-isopropyl-d7),100 µg/mL,MeOH,1mL,

Tonalide-d3, 100µg/ml in Acetone, 5ml