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CHEMets Chlorine Visual Method
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CHEMets Chlorine Visual Method Free and Total
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
Methods
Because of its strong oxidizing properties, chlorine is an excellent biocide used to treat potable waters, municipal wastes, and swimming pools. When used to treat potable water, chlorine helps alleviate the adverse effects of iron, manganese, ammonia, and sulfide. The Maximum Residual Disinfectant Level for chlorine is 4 mg/L in drinking water.
The DPD Method
References: USEPA Methods for Chemical Analysis of Water and Wastes, Method 330.5 (1983). APHA Standard Methods, 20th ed., pp. 4-63, Method 4500-Cl G (1998). In the USEPA-approved DPD methodology, free chlorine reacts with DPD to form a pink product. When ammonia or amines are present, some of the chlorine may exist as combined chlorine. Combined chlorine will not interfere with the free chlorine results, provided the readings are taken at one minute. To determine total chlorine (the sum of free and combined), use the A-2500 Activator Solution (potassium iodide) supplied in the kit. Results are expressed as ppm (mg/L) Cl2.
The DDPD Method
Reference: Developed by CHEMetrics, Inc.
The DDPD method is derived from the DPD method. Test kits that employ this chemistry are well suited for use where biocides and chromate corrosion inhibitors are used simultaneously. DDPD reacts with free chlorine to form a purple product. When ammonia or amines are present in the sample, some of the chlorine may exist as combined chlorine. To determine total chlorine (the sum of free and combined), use the A-2500 Activator Solution (potassium iodide) that is supplied in the kit. Results are expressed as ppm (mg/L) Cl2.
CHEMetrics' DDPD method is also applicable to the direct determination of hypochlorite concentrations in various cleaning preparations and disinfectants prior to their dilution. The DDPD compound reacts with hypochlorite ions to form a purple color. Results are expressed as percent (%) NaOCl.
Visual Kits
Range: 0-0.20 ppm
MDL: 0.04 ppm / Method: DDPD
Cat# Chlorine (free & total) ULR CHEMets Kit K-2511
ULR CHEMets Refill, 30 ampoules R-2511
Activator Solution Pack, six 10 mL bottles, Shelf-life 2 years A-25001
Neutralizer Solution Pack, six 20 mL bottles, Shelf-life 2 years A-25011
Comparator, Shelf-life 2 years: 0, 0.04, 0.06, 0.08, 0.10, 0.12, 0.16, 0.20 ppm C-2511
Kit comes in a plastic case and contains everything needed to perform 30 tests: Refill, Comparator, Activator Solution, Neutralizer Solution, 25 mL sample cup, instructions, and MSDS.
Range: 0-1 & 1-5 ppm
MDL: 0.05 ppm / Method: DPD
Cat#Chlorine (free & total) CHEMets Kit K-2504
CHEMets Refill, 30 ampoules R-2500
Activator Solution Pack, six 10 mL bottles, Shelf-life 2 years A-25001
Low Range Comparator, Shelf-life 2 years: 0, 0.1, 0.2, 0.3, 0.4, 0.6, 0.8. 1.0 ppm C-2504
High Range Comparator, Shelf-life 2 years: 1.0, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5, 5.0 ppm C-2506
Kit comes in a plastic case and contains everything needed to perform 30 tests: Refill, Low and High Range Comparators, Activator Solution, 25 mL sample cup, instructions, and MSDS.
Range: 0-1 & 1-5 ppm
MDL: 0.05 ppm / Method: DDPD
Cat# Chlorine (free & total) CHEMets Kit K-2505
CHEMets Refill, 30 ampoules R-2505
Activator Solution Pack, six 10 mL bottles, 2 years A-25001
Neutralizer Solution Pack, six 20 mL bottles, Shelf-life 2 years A-25011
Low Range Comparator, Shelf-life 2 years: 0, 0.1, 0.2, 0.3, 0.4, 0.6, 0.8. 1.0 ppm C-2501
High Range Comparator, Shelf-life 2 years: 1.0, 1.5, 2.0, 2.5, 3.0, 3.5, 4.0, 4.5, 5.0 ppm C-2505
Kit comes in a plastic case and contains everything needed to perform 30 tests: Refill, Low and High Range Comparators, Activator Solution, Neutralizer Solution, 25 mL sample cup, instructions, and MSDS.
Range: 0-30 & 30-150 ppm
MDL: 5 ppm / Method: DDPD
Cat# Chlorine (free & total) VACUettes Kit K-2505D
VACUettes Refill, 30 ampoules R-2505D
Activator Solution Pack, six 10 mL bottles, Shelf-life 2 years A-25001
Neutralizer Solution Pack, six 20 mL bottles, Shelf-life 2 years A-25011
Low Range Comparator, Shelf-life 2 years: 0, 5, 7.5, 10, 15, 20, 25, 30 ppm C-2501D
High Range Comparator, Shelf-life 2 years: 30, 45, 60, 75, 87.5, 100, 112.5, 125, 150 ppm C-2505D
Kit comes in a plastic case and contains everything needed to perform 30 tests (except distilled water): Refill, Low and High Range Comparators, Activator Solution, Neutralizer Solution, dilutor snapper cup, micro test tube, instructions, and MSDS.