EPA Method 8021B Internal Standard

(+/-)-Pyriproxyfen-d4 (pyridyl-d4),100 µg/mL,acetonitrile,1mL,

Vitamin A-d5 acetate, 100µg/mL, Solvent-methanol, Unit 1mL, # of units-5, Cas.no.

Nitrogen Calibration Set-Low Boiling Solvents Units: 1x1mL ampoules or 10mL screw-capped bottle Nitrogen introduced using Pyridine Catalogue No. Concentration Matrix: isooctane mg/kg (ppm) S-4140-0 Blank S-4140-03 0.3