|Range||MDL||Method||Kit Catalog No.||Refill Catalog No.|
|0-1 & 0-5 ppm||0.05 ppm||DPD||K-7904||R-7904|
|0-70 & 0-300 ppm||7 ppm||DPD||K-7904A||R-7904A|
|0-130 & 0-600 ppm||15 ppm||DPD||K-7904B||R-7904B|
|0-1200 & 0-6000 ppm||120 ppm||DPD||K-7904C||R-7904C|
|0-30 & 0-150 ppm||3 ppm||DPD||K-7904D||R-7904D|
|Range||Method||Kit Catalog No.|
Because it is a strong disinfectant, peracetic acid is an excellent sanitizing agent for the food and beverage industry. Peracetic acid is used to disinfect equipment, pasteurizers, tanks, pipelines, evaporators, fillers, and contact surfaces in food processing plants. The pulp and paper industry uses peracetic acid as a delignification and bleaching agent. Peracetic Acid is also coming into use as a biocide in wastewater applications.
The DPD Method
References: USEPA Methods for Chemical Analysis of Water and Wastes, Method 330.5 (1983). APHA Standard Methods, 22nd ed., Method 4500-CI G -2000.
In the Peracetic Acid DPD test method, the sample is treated with an excess of potassium iodide. Peracetic acid oxidizes the iodide to iodine. The iodine then oxidizes DPD (N, N-diethyl-p-phenylenediamine) to form a pink-colored species that is directly proportional to the peracetic acid concentration in the sample. Results are expressed as ppm (mg/L) peracetic acid.
Various oxidizing agents such as halogens, ozone, and cupric ions will produce high test results. Hydrogen peroxide does not interfere if present at levels comparable to the peracetic acid levels.