Wide range kinetic determination of peracid and/or peroxide concentrations

A system for determining a concentration of a peracid and a concentration of a peroxide within a use composition over a wide concentration range, the system comprising:

• an optical sensor that is configured to obtain response data from a sample that includes a volume of the use composition, and a volume of at least one reagent, wherein the response data is indicative of absorbance of the sample as a function of time at a selected wavelength;
• and
• a processor communicatively connected to the optical sensor, and configured to:
• select a wavelength for analyzing the sample based on at least one of an estimated concentration of the peracid or an estimated concentration of the peroxide, wherein the wavelength is selected from at least a first wavelength associated with a first estimated concentration of the peracid or a first estimated concentration of the peroxide, and a second wavelength associated with a second estimated concentration of the peracid or a second estimated concentration of the peroxide, wherein the second wavelength is greater than the first wavelength, the second estimated concentration of the peracid is greater than the first estimated concentration of the peracid, and the second estimated concentration of peroxide is greater than the first estimated concentration of peroxide;
• and
• determine the concentration of the peracid and the concentration of the peroxide based on the response data wherein the first estimated peracid concentration is between 100 parts per million (ppm) and 1000 ppm and the first estimated peroxide concentration is between 100 ppm and 5000 ppm, or the second estimated peracid concentration is between 1000 ppm and 5000 ppm and the second estimated peroxide concentration is between 5000 ppm and 40,000 ppm.