EPA Method 504 - EDB & DBCP Back Catalog number: 19029 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended DF-IS-C Mass-Labelled PCDD/PCDF Internal Standard Solution, 1.2ml, nonane Price on request 93443 Citric acid [0.2% wt] Price on request 95389 Aromatic HC Mix Price on request