delta-HCH, 100 µg/ml, Methanol, 5ml

Metolachlor (ring-13C6), 100µg/ml in n-Nonane, 1,2ml

Thiophene in Toluene Units: 5x1mL ampoule, 1x10mL screw-capped bottle Chiron No. Concentration µgS/g (ppm) Wt.% S-4053-0 Blank 0 S-4053-K 1 000 0.1000 S-4053-2.5K 2 500 0.2500 S-4053-5K

Ethalfluralin, 10.0 µg/ml, Ethyl acetate, 10ml