Molybdate is used throughout the industrial water treatment and power generation industries as a corrosion inhibitor in both open- and closed-loop cooling water systems. In solution, molybdate anions complex with oxidized iron to form a protective film of molybdate and ferric-oxide. Molybdate is considered an effective, environmentally acceptable alternative to chromate treatment. Unlike many other transition elements, molybdenum exhibits low or even negligible toxicity
The Catechol Method
References: G. P. Haight and V. Paragamian, Analytical Chemistry, pp. 32, 642 (1960). H. Onishi and E. B. Sandell, Photometric Determination of Trace Metals, 4th ed., Part 1, p. 295 (1978).
The molybdate test method employs the catechol chemistry. In a mildly reducing alkaline solution, catechol reacts with hexavalent molybdenum to form a yellow-orange colored chelate in direct proportion to the hexavalent molybdenum concentration. Test results are expressed in ppm (mg/L) molybdenum (Mo).
Range: 0-25.0 ppm as Mo
Method: Catechol
Kit comes in a cardboard box and contains everything needed to perform 30 tests: thirty ampoules, 25 mL sample cup, ampoule blank, and instructions.
Vacu-vials Kits require the use of the V-2000 Photometer or a spectrophotometer capable of accepting a 13 mm diameter round cell. Instrument sold separately.
WARNING! This product can expose you to chemicals including catechol, which is known to the State of California to cause cancer. For more information go to www.P65Warnings.ca.gov.