GFAA Mix Back Catalog number: 50408 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended DF-IS-H40 Mass-Labelled PCDF Internal Standard Solution, 1.2ml, nonane Price on request 63128 2,2’,3,3’,4,4’-Hexachlorobiphenyl (128) Price on request 70209 Methyl tert-butyl ether Price on request