1,2,4,7/1,2,4,8-Tetrachlorodibenzo-p-dioxin mix, 1.2ml x 50ug/ml, nonane

Low level Nitrogen Calibration Units: 1x1mL ampoules or 10mL screwcapped bottle Nitrogen introduced using Aniline Catalogue No. Concentration Matrix: isooctane mg/kg (ppm) S-4142-0 Blank S-4142-05 0.5 S-4142-1

2,3,6-Trichlorobiphenylene, 1.2ml x 50ug/ml, nonane

Benzo(k)fluoranthene