Jump to Method AlkalinityAluminumAmmoniaBromineCalciumCarbon Dioxide (dissolved)Chemical Oxygen Demand (COD)ChlorideChlorineChlorine DioxideChromateConductivityCopperCyanideDEHADetergents (anionic surfactants)Filming Amine (aliphatic amine)FluorideFormaldehydeGlutaraldehydeGlycolHardnessHydrazineHydrogen PeroxideHypochloriteIronManganeseMercaptobenzothiazole (MBT)MolybdateNitrateNitriteOxygen (dissolved)OzonePeracetic AcidPermanganatepHPhenolsPhosphateQuaternary Ammonium Compounds (QACs)SilicaSulfateSulfideSulfiteThiosulfateTotal Dissolved Solids (TDS)Total Petroleum Hydrocarbons (TPH)TurbidityZinc   Chlorine   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.   • Click to View MSDS and Kit instructions     Visual Kits 0-0.20 ppm 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-2500 Neutralizer Solution Pack, six 20 mL bottles, Shelf-life 2 years A-2501 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. Click here to Buy Now Complete Kits! 0-1 & 1-5 ppm 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-2500 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. Click here to Buy Now Complete Kits! 0-1 & 1-5 ppm 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-2500 Neutralizer Solution Pack, six 20 mL bottles, Shelf-life 2 years A-2501 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. Click here to Buy Now Complete Kits! 0-30 & 30-150 ppm 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-2500 Neutralizer Solution Pack, six 20 mL bottles, Shelf-life 2 years A-2501 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. Click here to Buy Now Complete Kits! 0-60 & 60-300 ppm 10 ppm / Method: DDPD   Cat# Chlorine (free & total) VACUettes Kit K-2505A VACUettes Refill, 30 ampoules R-2505A Activator Solution Pack, six 10 mL bottles, Shelf-life 2 years A-2500 Neutralizer Solution Pack, six 20 mL bottles, Shelf-life 2 years A-2501 Low Range Comparator, Shelf-life 2 years: 0, 10, 15, 20, 30, 40, 50, 60 ppm C-2501A High Range Comparator, Shelf-life 2 years: 60, 90, 120, 150, 175, 200, 225, 250, 300 ppm C-2505A 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. Click here to Buy Now Complete Kits! 0-120 & 120-600 ppm 20 ppm / Method: DDPD   Cat# Chlorine (free & total) VACUettes Kit K-2505B VACUettes Refill, 30 ampoules R-2505B Activator Solution Pack, six 10 mL bottles, Shelf-life 2 years A-2500 Neutralizer Solution Pack, six 20 mL bottles, Shelf-life 2 years A-2501 Low Range Comparator, Shelf-life 2 years: 0, 20, 30, 40, 60, 80, 100, 120 ppm C-2501B High Range Comparator, Shelf-life 2 years: 120, 180, 240, 300, 350, 400, 450, 500, 600 ppm C-2505B 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. Click here to Buy Now Complete Kits! 0-1000 & 1000-5000 ppm 100 ppm / Method: DDPD   Cat# Chlorine (free & total) VACUettes Kit K-2505C VACUettes Refill, 30 ampoules R-2505C Activator Solution Pack, six 10 mL bottles, Shelf-life 2 years A-2500 Neutralizer Solution Pack, six 20 mL bottles, Shelf-life 2 years A-2501 Low Range Comparator, Shelf-life 2 years: 0, 100, 200, 300, 400, 600, 800, 1000 ppm C-2501C High Range Comparator, Shelf-life 2 years: 1000, 1500, 2000, 2500, 3000, 3500, 4000, 4500, 5000 ppm C-2505C 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. Click here to Buy Now Complete Kits! 0.3-1.6% as NaOCl 0.3% / Method: DDPD   Cat# Chlorine (hypochlorite) VACUettes Kit K-5805 VACUettes Refill, 30 ampoules R-5805 Comparator, Shelf-life 2 years: 0.3, 0.45, 0.6, 0.75, 0.95, 1.15, 1.3, 1.45, 1.6% C-5805 Kit comes in a plastic case and contains everything needed to perform 30 tests (except distilled water): Refill, Comparator, 25 mL sample cup, dilutor snapper cup, 1.0 mL syringe, micro test tube, instructions, and MSDS. Click here to Buy Now Complete Kits! 2.5-13% as NaOCl 2.5% / Method: DDPD   Cat# Chlorine (hypochlorite) VACUettes Kit K-5814 VACUettes Refill, 30 ampoules R-5814 Comparator, Shelf-life 12 months: 2.5, 4, 5, 6.5, 8, 9, 10.5, 12.0, 13.0% C-5814 Kit comes in a plastic case and contains everything needed to perform 30 tests (except distilled water): Refill, Comparator, 25 mL sample cup, dilutor snapper cup, 1.0 mL syringe, micro test tube, instructions, and MSDS. Click here to Buy Now Complete Kits!     Instrumental Kits 0.40-5.00 ppm DPD   Cat# Chlorine (free) Vacu-vials Kit K-2523 Kit comes in a cardboard box and contains everything needed to perform 30 tests: thirty ampoules, 25 mL sample cup, ampoule blank, instructions, calibration table, and MSDS. Click here to Buy Now Complete Kits! 0.40-5.00 ppm DPD   Cat# Chlorine (free & total) Vacu-vials Kit K-2513 Kit comes in a cardboard box and contains everything needed to perform 30 tests: thirty ampoules, Activator Solution, 25 mL sample cup, ampoule blank, instructions, calibration table, and MSDS. Click here to Buy Now Complete Kits! 0.40-5.00 ppm DPD   Cat# Chlorine (free & total) SAM Kit I-2001 Vacu-vials Kit, 30 ampoules, Activator Solution, 25 mL sample cup, ampoule blank, instructions, calibration table, and MSDS. K-2513 SAM Kit comes in a plastic case and contains everything needed to perform 30 tests: Vacu-vials Kit, SAM Photometer, 2 AA batteries, and instructions. Click here to Buy Now Complete Kits!   Kit Components common to Chlorine 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 Syringe Pack, 1.0 mL (6 ea) A-0027 Click here to Buy Now Complete Kits!