APHA Standard Methods, 22nd ed., Method 4500-Cl G - 2000; USEPA Methods for Chemical Analysis of Water and Wastes, Method 330.5 (1983)
The sample is treated with an excess of potassium iodide. Ozone oxidizes the iodide to iodine, and the iodine then oxidizes DPD (N,N-diethyl-p-phenylenediamine) to form a pink colored species in direct proportion to the ozone concentration. Results are expressed as ppm (mg/L) O3.
Range: 0-5.00 ppm
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California Regulatory Warning
All of Ozone Solutions ozone generators are intended for industrial use ONLY within the state of California.
They are to be used in unoccupied spaces only.
Health hazard warning: emits ozone.