N,N'-Diphenylurea, 250mg

1,1,1,2-Tetrachloroethane, 1ml

EPA Method 508 Pesticide Standard

Methanol QC Reference Mixture III n-Butyl sulfide, 0.5 ppm (weight S by weight) in 99.9 % methanol; units: 1x10mL, 5x10mL