Specifications HI96781-25 Range 0 to 1000 μg/L (as Cr) Resolution 1 μg/L Accuracy ±10 μg/L ± 3% of reading Wavelength 525 nm Cuvette Type 13 mm diameter Method Adaptation of the Standard Methods of the Examination of Water and Wastewater, 22nd Edition, 3500-Cr, Diphenylcarbazide Method Method ID #087 # of Vials 25 HI96781-25 Chromium (VI), Total Pre-dosed Reagent Set 13 mm Vial HI96781-25 is a kit of pre-dosed reagents in vials for the determination of Chromium. There are vials for 25 tests to be used with Hanna’s HI801 and HI802 spectrophotometers. These high-quality reagents are manufactured in our state-ofthe-art facility and are clearly marked with lot number and expiration date for traceability. The method is compliant with ISO 11083 and assures a great accuracy (±10 µg/L). The Chromium VI procedure does not require digestion of the sample, while digestion is necessary for the Total Chromium procedure (60 minutes at 105°C). To determine the concentration of Chromium (III), subtract the results obtained from the procedure for Chromium (VI) from those obtained from the procedure for Total Chromium. The use of 13 mm (internal diameter) cuvettes, with a longer optical path than many other vials on the market, ensures accurate absorbance measurements and greater repeatability of results. Signicance and Use Chromium (III) is an essential element for humans and can be metabolized in the body. Chromium (III) is found naturally in fruit, vegetables, meat and grains. Chromium (VI) has been identied as a carcinogen and can alter genetic material. Chromium (VI) is discharged from steel and paper mills or through the oxidation of Chromium (III). Chromium (VI) has been a regulated drinking water contaminate since the 1940s, the EPA only regulates total chromium. Application Water, wastewater, process control Method The method used is an adaptation of the Standard Methods of the Examination of Water and Wastewater, 22nd Edition, 3500Cr, Diphenylcarbazide Method: this method is compliant with ISO 11083. 6 Reasons to Choose Hanna 1. With the same vials it is possible to measure both Total Chromium and Hexavalent Chromium 2. Accuracy ±10 μg/L 3. The Chromium VI procedure does not require digestion of the sample 4. To determine the concentration of Chromium (III), subtract the results obtained from the procedure for Chromium (VI) from those obtained from the procedure for Total Chromium 5. The method follows ISO 11083 6. Representative sample: 5 mL Procedure guides on inside lid 11 COD and Vials 11.26 | www.hannainst.com Pre-dosed Reagents
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