PCB No. 2, 100µg/ml in Isooctane, 1ml

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

Heptachlor endo-epoxide, 100 µg/ml, Ethyl acetate

Amidotrizoic acid, 100µg/ml in Acetonitrile, 5ml