WS Anions - Cal Check

3,3'-Dimethylbenzidine,100 µg/mL,acetonitrile,1mL,

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

EPA Method 528 Internal Standard