WP Total Hardness Back Catalog number: 54597 Manufacturer: ABSOLUTE STANDARDS Availability: In the manufacturer's stock Price on request - + Recommended 673467 Triforine, 100 µg/ml, Acetonitrile, 5ml Price on request MDF-23 2,3-Dichloro[13C12]dibenzofuran, 1.2ml x 50ug/ml, toluene Price on request 59288 Mix 2 - Anions Price on request