EPA Method 632.1 Analytes Back Catalog number: 40047 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 98747 UCMR4 - Method 525.3 - Surrogate Mix Price on request 57011 Sodium (Na), 1000µg/ml in 2%-HNO3/Water, 100ml Price on request 95620 552.2Mix Price on request