Ozone
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Methods
Visual Kits
Ozone is a strong oxidizing agent and is used as an Range: 0-0.6 & 0.6-2.0 ppm
alternative to chlorine as a biocide in the disinfection
MDL: 0.025 ppm / Method: DDPD
of drinking water. Ozone is used to remove odor,
Cat#
decolorize, and to control algae and other aquatic
CHEMets Kit K-7402
growths.
CHEMets Refill, 30 ampoules R-7402
Activator Solution Pack, six 10 mL bottles, Shelf-life 2 years A-7400
1
Ozone is also used in various disinfectant/steriliza-
Low Range Comparator, Shelf-life 2 years:
tion processes in the food & beverage and pharmaceu- 0, 0.05, 0.1, 0.2, 0.3, 0.4, 0.5, 0.6 ppm C-7401
tical industries. 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
The DDPD Method
Kit comes in a plastic case and contains everything needed to perform
30 tests: Refill, Low and High Range Comparators, Activator Solution, 25 mL
Reference: Developed by CHEMetrics, Inc.
sample cup, instructions, and MSDS.
The DDPD chemistry employs a methyl-substituted
form of the DPD reagent. The A-7400 activator solu-
Instrumental Kits
tion (potassium iodide) is added to the sample before
analysis. Ozone reacts with the iodide to liberate
SAM Single-Analyte Photometer
iodine. The iodine then reacts with the reagent to
(See page 15 for instrumental features)
give a purple color.
Various free halogens and halogenating agents Range: 0.15-1.00 ppm
produce color with the reagent. Chromate in samples
Method: Indigo
below 25 ppm will not interfere with results. Results
Cat#
are expressed as ppm (mg/L) O
SAM Kit I-2015
2
3
.
Vacu-vials Kit, 30 ampoules, 25 mL sample cup, instructions,
calibration table, and MSDS, Shelf-life 8 months. K-7413
The Indigo Method
SAM Kit comes in a plastic case and contains everything needed to perform
References: Bader H. and J. Hoigne, “Determination
up to 29 tests (except distilled water): Vacu-vials Kit, SAM Photometer, 4 AA
batteries, and instructions.
of Ozone in Water by the Indigo Method, “ Water
Research Vol. 15, pp. 449-456, 1981. APHA Standard
Range: 0.20-3.00 ppm
Methods, 20
th
ed., pp. 4-137, Method 4500-0
3
B Method: DDPD
(1998).
Cat#
With the indigo method, indigo trisulfonate reacts
SAM Kit I-2007
instantly and quantitatively with ozone, bleaching
Vacu-vials Kit, 30 ampoules, Activator Solution, 25 mL sample cup,
ampoule blank, instructions, calibration table, and MSDS. K-7403
the blue color in direct proportion to the amount
SAM Kit comes in a plastic case and contains everything needed to perform
of ozone present. Malonic acid is included in the
30 tests: Vacu-vials Kit, SAM Photometer, 2 AA batteries, and instructions.
ampoule to prevent interference from up to 3 ppm
chlorine. Results are expressed as ppm (mg/L) O
3
. 1
The accessory pack supplies enough solution to perform at least
200 tests.
2
Although the test kit contains 30 ampoules, a fresh reagent
ampoule blank must be prepared for each series of tests; there-
fore, the number of samples that can be tested with each refill
will vary from a maximum of 29 to a minimum of 15.
62
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