EPA Method 524 & 624 - Internal Standard Back Catalog number: 19794 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 97957 Method 525.2 Solution A Price on request L20920000AL Phenanthrene, 10µg/ml in Acetonitrile, 10ml Price on request P48-RS Mass-Labelled PCB Recovery Standard, 1.2ml, nonane Price on request