QC Standard 1 Back Catalog number: 53084 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 30053 EPA Method 552 Haloacetic acids Price on request 50464 Ammonia as N Price on request MPFHXS Sodium perfluoro-1-hexane[18O2]sulfonate, 1.2ml x 50ug/ml, methanol Price on request