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CHEMets Chlorine Dioxide Visual Method
The CHEMets Method To perform a test, immerse the CHEMet ampoule into the sample and snap off the tip (Step 1)- the correct volume of sample is automatically drawn in, filling the ampoule; a small inert gas bubble remains in the ampoule. To facilitate mixing the sample and reagent, tilt the ampoule back and forth so the bubble travels from end to end (Step 2). In 2 minutes or less, quantify the result by comparing the filled ampoule to the appropriate color standard(s) (Step 3). For higher concentrations, the flat comparator is used. For lower concentrations, the round comparator is used. The ampoule is compared with the standards until a color match is found. Kits include 30 ampoules, comparator(s), accessory solution(s)(when necessary), a sample cup, and instructions. Refill packs of 30 ampoules and accessory solutions are available separately. Comparators have a 2-year shelflife. Material Safety Data Sheets are provided in test kits. CHEMets ampoules are designed for maximum simplicity and accuracy. Each glass ampoule is 7 mm in diameter, 100 mm in length, with a tapered, pre-scored tip; reagents are vacuum-sealed inside.
Product Description
References: USEPA Methods for Chemical Analysis of Water and Wastes, Method 330.5 (1983). APHA Standard Methods, 20th ed., pp. 4-76, Method 4500-ClO2 D and pp. 4-63 Method 4500-Cl G (1998). Chlorine dioxide is used as an oxidizing microbiocide in industrial cooling water treatment, the dairy industry, the meat industry, and many other food and beverage industry applications. It is used as a bleaching agent in the pulp and paper industry, and as a disinfectant in municipal water treatment. Industrial waste treatment facilities use chlorine dioxide because of its selectivity for certain compounds, including phenols, sulfides, cyanides, thiosulfates, and mercaptans. The oil and gas industry uses chlorine dioxide for downhole applications and as a stimulation enhancement additive.
The Maximum Residual Disinfectant Level for chlorine dioxide is 0.8 mg/L in drinking water.
In the standard DPD methodology, chlorine dioxide reacts with DPD (N, N-diethyl-p-phenylenediamine) to form a pink product. Interference from free Cl2 is prevented (up to 6 ppm Cl2) by the addition of glycine to the sample. Results are expressed as ppm (mg/L) ClO2.
Visual Kit
Range: 0-2 & 2-10 ppm
MDL: 0.1 ppm / Method: DPD
Cat# CHEMets Kit K-2705
CHEMets Refill, 30 ampoules R-2705
Neutralizer Solution Pack, six 10 mL bottles, Shelf-life 8 months A-27001
Low Range Comparator, Shelf-life 2 years: 0, 0.2, 0.4, 0.6, 0.8, 1.2, 1.6, 2.0 ppm C-2702
High Range Comparator, Shelf-life 2 years: 2, 3, 4, 5, 6, 7, 8, 9, 10 ppm C-2710
Kit comes in a plastic case and contains everything needed to perform 30 tests: Refill, Low and High Range Comparators, Neutralizer Solution, 25 mL sample cup, instructions, and MSDS.