2,3,6,7-Tetrachloro-9H-carbazole, 1.2ml x 50ug/ml, nonane

Triticonazole, 100 µg/ml, Ethyl acetate, 5ml

Nitrate as NO3-, 1000µg/ml in water, 100ml

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