Base/Neutral Standard Back Catalog number: 94297 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 57129 Copper (Cu) Price on request DF-IS-J20 Mass-Labelled PCDD Internal Standard Solution, 1.2ml, nonane Price on request T3TBPP Tris(3-tert-butylphenyl) phosphate, 1.2ml x 50ug/ml, toluene Price on request