EPA Method 8141 Surrogate Standard Back Catalog number: 92387 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 95404 Aroclor 1242 & Tetrachloro-m-xylene Price on request 72724 Heptaldehyde, 1000µg/ml in Acetone, 1ml Price on request 681356 Sanguinarine chloride, 5mg Price on request