What question did this study set out to answer?

To develop and evaluate an intelligent smartphone RGB colorimetry method for the rapid determination of pseudo-first-order kinetics and activation energy in hydrogen peroxide decomposition.

September 17, 2026Journal of Chemical Education

Upgrading Smartphone RGB Colorimetry for Rapid Determination of Hydrogen Peroxide Decomposition Kinetics

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Authors

ZOZhuodong OuWuhan University FLFuxuan LiWuhan University WYWeijie YangWuhan University

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Implication

Laboratory study demonstrates rapid measurement of hydrogen peroxide decomposition kinetics in undergraduate students, indicating a sustainable, low-cost alternative to spectrophotometry.

Key Points

To develop and evaluate an intelligent smartphone RGB colorimetry method for the rapid determination of pseudo-first-order kinetics and activation energy in hydrogen peroxide decomposition.
Integrated a potassium titanyloxalate–H2O2 color-forming complex with smartphone blue-channel (430–470 nm) image analysis and an automated Python processing script.
Tested the method across temperatures from 5 °C to 45 °C with N=28 undergraduate students to construct Arrhenius plots and benchmark against standard UV–Vis spectrophotometry.
Established a linear calibration curve relating blue-channel intensity to H2O2 concentration across 0.1–1.5 mM (R² = 0.9902).
Calculated an activation energy of 44.8 ± 2.4 kJ mol–1, consistent with reference UV–Vis spectrophotometry measurements (44.8 ± 0.07 kJ mol–1).
Shortened experimental duration to approximately 45 minutes while maintaining high analytical precision with a relative standard deviation below 5%.

Cite This Study

Ou et al. (2026) studied this question.

synapsesocial.com/papers/6aabb6725f706d05830e4ef4 https://doi.org/10.1021/acs.jchemed.5c01468

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Implication

Laboratory study demonstrates rapid measurement of hydrogen peroxide decomposition kinetics in undergraduate students, indicating a sustainable, low-cost alternative to spectrophotometry.

Upgrading Smartphone RGB Colorimetry for Rapid Determination of Hydrogen Peroxide Decomposition Kinetics

Discussion

Member takes

Implication

Key Points

Cite This Study

Upgrading Smartphone RGB Colorimetry for Rapid Determination of Hydrogen Peroxide Decomposition Kinetics

Discussion

Member takes

Implication

Key Points

Cite This Study

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