EPA Method 548 Analyte Back Catalog number: 30048 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 59107 Anions Calibration Mix Price on request 59105 Phosphate (PO43-) as P Price on request 1160.40-100-IO n-Tetracontane, 100µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 4181-95-7 Price on request