EPA Method 507 Analyte Mix #1 Back Catalog number: 30182 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 2491.20-K-IO Di-n-octyldiethyltin, 1000µg/mL, Solvent-isooctane, Unit 1mL, # of units-1, Cas.no. 14775-13-4 Price on request 54543 Calcium Hardness Price on request 687264 2-Amino-4-methoxy-6-methyl-1,3,5-triazine, 100 μg/ml, Acetonitrile, 5ml Price on request