Dicloran, 100 µg/ml, Acetonitrile, 1ml

Methanol QC Reference Mixture III n-Butyl sulfide, 0.5 ppm (weight S by weight) in 99.9 % methanol; units: 10x10mL

Tri-o-tolyl phosphate, 1.2ml x 50ug/ml, toluene

Manganese (Mn)