Peracetic Acid Test Kits

Visual Kits

Range MDL Method Kit Catalog No. Refill Catalog No.
0-1 & 0-5 ppm 0.05 ppm DPD K-7904 R-7904
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
0-70 & 0-300 ppm 7 ppm DPD K-7904A R-7904A

Instrumental Kits

Range Method Kit Catalog No.
0-5.00 ppm DPD K-7913
0-5.0 ppm DPD I-2020

Method

 

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.