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Molybdate |
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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).
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 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). |
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| • Click to View MSDS and Kit instructions |
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 Visual Kits |
0-7 ppm as Mo
0.5 ppm / Method: Catechol |
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Cat# |
| CHEMets Kit |
K-6701 |
| | CHEMets Refill, 30 ampoules | R-6702 |
| | Comparator, Shelf-life 2 years:
0, 1, 2, 3, 4, 5, 6, 7 ppm | C-6701 |
| | Kit comes in a plastic case and contains everything needed to perform 30 tests: Refill, Comparator, 25 mL sample cup, instructions, and MSDS. | |
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2-24 ppm as Mo
2 ppm / Method: Catechol |
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Cat# |
| CHEMets Kit |
K-6702 |
| | CHEMets Refill, 30 ampoules | R-6702 |
| | Comparator, Shelf-life 2 years:
2, 4, 6, 8, 10, 12, 16, 20, 24 ppm | C-6702 |
| | Kit comes in a plastic case and contains everything needed to perform 30 tests: Refill, Comparator, 25 mL sample cup, instructions, and MSDS. | |
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20-200 ppm as Mo
20 ppm / Method: Catechol |
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Cat# |
| CHEMets Kit |
K-6720 |
| | CHEMets Refill, 30 ampoules | R-6720 |
| | Comparator, Shelf-life 2 years:
20, 40, 60, 80, 100, 120, 140, 160, 200 ppm | C-6720 |
| | Kit comes in a plastic case and contains everything needed to perform 30 tests: Refill, Comparator, 25 mL sample cup, instructions, and MSDS. | |
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 Instrumental Kits |
1.0-25.0 ppm as Mo
Catechol |
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Cat# |
| Vacu-vials Kit |
K-6703 |
| | Kit comes in a cardboard box and contains everything needed to perform 30 tests: thirty ampoules, 25 mL sample cup, ampoule blank, instructions, calibration table, and MSDS. | |
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Kit Components common to Molybdate |
| Description |
Cat# |
| | Sample Cup Pack, 25 mL (6 ea) | A-0013 |
| | Ampoule Blank Pack (5 ea) | A-0023 |
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