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Ozone |
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 Methods
Ozone is a strong oxidizing agent and is used as an alternative to chlorine as a biocide in the disinfection of drinking water. Ozone is used to remove odor, decolorize, and to control algae and other aquatic growths.
Ozone is also used in various disinfectant/ sterilization processes in the food & beverage and pharmaceutical industries.
The DDPD Method
Reference: Developed by CHEMetrics, Inc.
The DDPD chemistry employs a methyl-substituted form of the DPD reagent. The A-7400 activator solution (potassium iodide) is added to the sample before analysis. Ozone reacts with the iodide to liberate iodine. The iodine then reacts with the reagent to give a purple color.
Various free halogens and halogenating agents produce color with the reagent. Chromate in samples below 25 ppm will not interfere with results. Results are expressed as ppm (mg/L) O3.
The Indigo Method
References: Bader H. and J. Hoigne, “Determination of Ozone in Water by the Indigo Method, “ Water Research Vol. 15, pp. 449-456, 1981. APHA Standard Methods, 20th ed., pp. 4-137, Method 4500-03 B (1998).
With the indigo method, indigo trisulfonate reacts instantly and quantitatively with ozone, bleaching the blue color in direct proportion to the amount of ozone present. Malonic acid is included in the ampoule to prevent interference from up to 3 ppm chlorine. Results are expressed as ppm (mg/L) O3. |
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| • Click to View MSDS and Kit instructions |
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 Visual Kits |
0-0.6 & 0.6-2.0 ppm
0.025 ppm / Method: DDPD |
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Cat# |
| CHEMets Kit |
K-7402 |
| | CHEMets Refill, 30 ampoules | R-7402 |
| | Activator Solution Pack, six 10 mL bottles, Shelf-life 2 years | A-7400 |
| | Low Range Comparator, Shelf-life 2 years:
0, 0.05, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6 ppm | C-7401 |
| | High Range Comparator, Shelf-life 2 years:
0.6, 0.7, 0.8, 1.0, 1.2, 1.4, 1.6, 1.8, 2.0 ppm | C-7402 |
| | 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. | |
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 Instrumental Kits |
0.30-1.00 ppm
Indigo |
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Cat# |
| SAM Kit |
I-2015 |
| | Vacu-vials Kit, 30 ampoules, 25 mL sample cup, instructions, calibration table, and MSDS, Shelf-life 6 months. | K-7413 |
| | SAM Kit comes in a plastic case and contains everything needed to perform up to 29 tests (except distilled water): Vacu-vials Kit, SAM Photometer, 4 AA batteries, and instructions. | |
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0.20-3.00 ppm
DDPD |
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Cat# |
| SAM Kit |
I-2007 |
| | Vacu-vials Kit, 30 ampoules, Activator Solution, 25 mL sample cup, ampoule blank, instructions, calibration table, and MSDS. | K-7403 |
| | 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. | |
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0.30-1.00 ppm
Indigo |
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Cat# |
| Vacu-vials Kit, Shelf-life 6 months |
K-7413 |
| | Kit comes in a cardboard box and contains everything needed to perform up to 29 tests (except distilled water): thirty ampoules, 25 mL sample cup, ampoule blank,instructions, calibration table, and MSDS. | |
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0.20-2.50 ppm
DDPD |
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Cat# |
| Vacu-vials Kit |
K-7403 |
| | 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. | |
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Kit Components common to Ozone |
| Description |
Cat# |
| | Sample Cup Pack, 25 mL (6 ea) | A-0013 |
| | Ampoule Blank Pack (5 ea) | A-0023 |
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