Disulfoton-sulfone, 100 µg/ml, Acetonitrile, 5ml

1,2,4-Trichlorobenzene, 100µg/mL, Solvent-c.hexane or ac.nitrile, Unit 1mL, # of units-1, Cas.no. 120-82-1

EPA Method 531.1 Individual Analytes

Selenium (Se)