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Chromate |
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 Method
References: APHA Standard Methods, 20th ed., pp. 3-66, Method 3500-Cr B (1998). ASTM D 1687-92 (1996), Chromium in Water, Test Method A. Hexavalent chromium salts are used in numerous industrial processes. They are also used extensively as corrosion inhibitors in open and closed cooling water systems.
With the chromate test method, hexavalent chromium reacts with diphenylcarbazide under acid conditions to form a red-violet color. Results are quantified photometrically or by visual comparison with standards that are calibrated in ppm (mg/L) CrO4. |
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| • Click to View MSDS and Kit instructions |
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 Visual Kits |
0-1 & 1-10 ppm
0.05 ppm / Method: Diphenylcarbazide |
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Cat# |
| CHEMets Kit |
K-2810 |
| | CHEMets Refill, 30 ampoules | R-2810 |
| | Acidifier Solution Pack, six 10 mL bottles, Shelf-life 2 years | A-2800 |
| | Low Range Comparator, Shelf-life 2 years:
0, 0.1, 0.2, 0.3, 0.4, 0.6, 0.8, 1.0 ppm | C-2801 |
| | High Range Comparator, Shelf-life 2 years:
1, 2, 3, 4, 5, 6, 7, 8, 10 ppm | C-2810 |
| | Kit comes in a plastic case and contains everything needed to perform 30 tests: Refill, Low and High Range Comparators, Acidifier Solution, 25 mL sample cup, instructions, and MSDS. | |
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0-30 & 30-300 ppm
5 ppm / Method: Diphenylcarbazide |
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Cat# |
| VACUettes Kit |
K-2810D |
| | VACUettes Refill, 30 ampoules | R-2810D |
| | Acidifier Solution Pack, six 10 mL bottles, Shelf-life 2 years | A-2800 |
| | Low Range Comparator, Shelf-life 2 years:
0, 5, 7.5, 10, 15, 20, 25, 30 ppm | C-2801D |
| | High Range Comparator, Shelf-life 2 years:
30, 60, 90, 120, 150, 175, 200, 250, 300 ppm | C-2810D |
| | Kit comes in a plastic case and contains everything needed to perform 30 tests (except distilled water): Refill, Low and High Range Comparators, Acidifier Solution, dilutor snapper cup, micro test tube, instructions, and MSDS. | |
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0-60 & 60-600 ppm
10 ppm / Method: Diphenylcarbazide |
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Cat# |
| VACUettes Kit |
K-2810A |
| | VACUettes Refill, 30 ampoules | R-2810A |
| | Acidifier Solution Pack, six 10 mL bottles, Shelf-life 2 years | A-2800 |
| | Low Range Comparator, Shelf-life 2 years:
0, 10, 15, 20, 30, 40, 50, 60 ppm | C-2801A |
| | High Range Comparator, Shelf-life 2 years:
60, 120, 180, 240, 300, 350, 400, 500, 600 ppm | C-2810A |
| | Kit comes in a plastic case and contains everything needed to perform 30 tests (except distilled water): Refill, Low and High Range Comparators, Acidifier Solution, dilutor snapper cup, micro test tube, instructions, and MSDS. | |
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0-120 & 120-1200 ppm
20 ppm / Method: Diphenylcarbazide |
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Cat# |
| VACUettes Kit |
K-2810B |
| | VACUettes Refill, 30 ampoules | R-2810B |
| | Acidifier Solution Pack, six 10 mL bottles, Shelf-life 2 years | A-2800 |
| | Low Range Comparator, Shelf-life 2 years:
0, 20, 30, 40, 60, 80, 100, 120 ppm | C-2801B |
| | High Range Comparator, Shelf-life 2 years:
120, 240, 360, 480, 600, 700, 800, 1000, 1200 ppm | C-2810B |
| | Kit comes in a plastic case and contains everything needed to perform 30 tests (except distilled water): Refill, Low and High Range Comparators, Acidifier Solution, dilutor snapper cup, micro test tube, instructions, and MSDS. | |
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0-1200 & 1200-12,000 ppm
200 ppm / Method: Diphenylcarbazide |
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Cat# |
| VACUettes Kit |
K-2810C |
| | VACUettes Refill, 30 ampoules | R-2810C |
| | Acidifier Solution Pack, six 10 mL bottles, Shelf-life 2 years | A-2800 |
| | Low Range Comparator, Shelf-life 2 years:
0, 200, 300, 400, 600, 800, 1000, 1200 ppm | C-2801C |
| | High Range Comparator, Shelf-life 2 years:
1200, 2400, 3600, 4800, 6000, 7000, 8000, 10,000, 12,000 ppm | C-2810C |
| | Kit comes in a plastic case and contains everything needed to perform 30 tests (except distilled water): Refill, Low and High Range Comparators, Acidifier Solution, dilutor snapper cup, micro test tube, instructions, and MSDS. | |
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 Instrumental Kits |
0.20-3.50 ppm
Diphenylcarbazide |
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Cat# |
| Vacu-vials Kit |
K-2803 |
| | Kit comes in a cardboard box and contains everything needed to perform 30 tests: thirty ampoules, Acidifier Solution, 25 mL sample cup, ampoule blank, instructions, calibration table, and MSDS. | |
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0.70-13.00 ppm
Diphenylcarbazide |
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Cat# |
| Vacu-vials Kit |
K-2823 |
| | Kit comes in a cardboard box and contains everything needed to perform 30 tests: thirty ampoules, Acidifier Solution, 25 mL sample cup, ampoule blank, instructions, calibration table, and MSDS. | |
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Kit Components common to Chromate |
| Description |
Cat# |
| | Sample Cup Pack, 25 mL (6 ea) | A-0013 |
| | Micro Test Tube Pack (10 ea) | A-0015 |
| | Dilutor Snapper Cup Pack (6 ea) | A-0018 |
| | Ampoule Blank Pack (5 ea) | A-0023 |
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