Metolachlor oxanilic acid (OA), certified, 10mg

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

Total Iron (Fe(II) and Fe(III))

Pentabromobenzyl acrylate, 1.2ml x 50ug/ml, toluene