EPA Method 528 Internal Standard Back Catalog number: 93188 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 70328 Aldicarb sulfone Price on request 71595 Diethylenetriamine Price on request DPMA Dechlorane Plus® Mono adduct, 1.2ml x 50ug/ml, toluene Price on request