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Zinc |
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Method
References: APHA Standard Methods, 20th ed., pp. 3-105, Method 3500-Zn B (1998). ASTM D 1691-84, Zinc in Water, Test Method A.
Zinc deposits are present in much of the earth’s crust. The metal provides an effective protective coating for steel (galvanized coatings) and is useful as an alloying agent. Zinc salts are useful as corrosion inhibitors in cooling water treatment formulations. The USEPA has established a Maximum Secondary Drinking Water Standard of 5 mg/L for zinc.
CHEMetrics’ method determines soluble zinc in drinking water and wastewater. Zinc reacts with the reagent zincon in a buffered alkaline solution to form a blue complex. Interference from other heavy metals can be eliminated by the addition of cyanide. However, for safety, cyanide has not been included in the reagent formulation. Results are expressed as ppm (mg/L) Zn.
Shelf-life: although the reagent in the ampoule is stable, the indicator solution has an eight-month shelflife. We recommend stocking quantities that will be used within seven months. The indicator solution can be ordered separately. |
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| • Click to View MSDS and Kit instructions |
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 Instrumental Kits |
0.30-3.00 ppm
Zincon |
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Cat# |
| Vacu-vials Kit, Shelf-life 8 months |
K-9903 |
| | Kit comes in a cardboard box and contains everything needed to perform 30 tests: thirty ampoules, Indicator Solution, 25 mL sample cup, ampoule blank, instructions, calibration table, and MSDS. | |
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0.60-6.00 ppm
Zincon |
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Cat# |
| Vacu-vials Kit, Shelf-life 8 months |
K-9923 |
| | Kit comes in a cardboard box and contains everything needed to perform 30 tests: thirty ampoules, Indicator Solution, 25 mL sample cup, ampoule blank, instructions, calibration table, and MSDS. | |
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Kit Components common to Zinc |
| Description |
Cat# |
| | Sample Cup Pack, 25 mL (6 ea) | A-0013 |
| | Ampoule Blank Pack (5 ea) | A-0023 |
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