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

4-Heptanone

D-Glucono-1,5-lactone, 2,5g

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