Hydrogen peroxide (H2O2) is widely used in bleaching treatments in the pulp and paper industry, in wastewater treatment, and as a food additive. However, H2O2 solutions are unstable and decompose slowly when subjected to external factors such as light, high temperatures, or metal compounds. Therefore, a simple and reliable method to measure the concentration of H2O2 is required for its proper use in various applications. We determined the concentration of an H2O2 solution by measurement at a single wavelength (249 nm) without any reagents or complex analytical procedures. In the present work, the measurable concentration of H2O2 was as low as 0.015 wt% (4.41 mM) and as high as 0.300 wt% (88.2 mM), with high linearity (99.99% at 249 nm) between the concentration of H2O2 and the optical density (OD) values. In addition, the method could be used to measure the concentration of H2O2 in a peracetic acid solution without interference from acetic acid and peracetate ion.

Abstract
Introduction
Material and Methods
    1. Chemicals
    2. Apparatus
    3. Observation of spectrum of H2O2 solutions in theUV region
    4. Determination of the concentration of H2O2samples by measurement of their OD valueat 249 nm
    5. Determination of the concentration of H2O2 inPAA solution by measurement of the OD valueat 249 nm
Results and Discussion
    1. Observation of spectrum for the determination ofH2O2 in the UV region
    2. Determination of H2O2 concentration in PAAsolution
Acknowledgements
References

• Hyun Jin Lim(Master, Division of Applied Life Sciences (BK21), Gyeongsang National University, Jinju 52828, Korea)
• Ji Yeon Kang(Master, Division of Applied Life Sciences (BK21), Gyeongsang National University, Jinju 52828, Korea)
• Jong Hee Kwon(Professor, Department of Food Science & Technology Professor, and Institute of Agriculture & Life Science Senior Researcher, Division of Applied Life Sciences (BK21), Gyeongsang National University, Jinju 52828, Korea) Corresponding author