1Faculty of Energy Science, Kim II Sung University, Pyongyang 999093,, North Korea
2Faculty of Energy Science, Kim II Sung University, Pyongyang 999093, North Korea
BibTex Citation Data :
@article{JCERP20725, author = {Kim Guk Chol and Kye Ryong Ri and Song Taek Kim and Jong Hyok Kim}, title = {Br-LMG/PVB film: A novel UVC dosimeter for process monitoring in chemical and environmental engineering}, journal = {Journal of Chemical Engineering Research Progress}, volume = {0}, number = {0}, year = {2026}, keywords = {UV disinfection, UVC dosimeter, bromo-leuco malachite green, polyvinyl butyral, colour difference, dose–response linearity}, abstract = { In this study, a novel UVC dosimeter based on a polyvinyl butyral (PVB) film containing bromo-leuco malachite green (Br-LMG) without any acid generator was fabricated, and its fundamental characteristics for 253.7 nm UVC dose measurement were comprehensively evaluated. Br-LMG/PVB films were irradiated with UVC doses of 0, 25, 50, 75, 100, 200 and 300 mJ/cm². The changes in optical density, dose–response linearity, post-irradiation short-term and long-term storage stability, and colour change were quantified using a UV-VIS spectrophotometer and a UV radiometer. After UVC irradiation, the film exhibited a maximum absorption peak at 630 nm and a weak absorption peak at 430 nm, corresponding to the intrinsic absorption of Br-LMG. The dose–response curve showed excellent linearity (R² ≈ 1) over the entire 0–300 mJ/cm ² range, and the sensitivity at 630 nm was calculated as 0.0031 (mJ/cm²)⁻ ¹ . Under room-temperature storage for 30 days after irradiation, the optical density increased by only 5.2–9.2% compared with the immediate post-irradiation value, indicating satisfactory long-term stability. In addition, short-term stability evaluation revealed that for high doses (300 mJ/cm²), the optical density increased slightly from 0.95 to 1.03 within 5 min after irradiation and then remained stable, suggesting that a stabilisation time of at least 5 min is required for high-dose measurements. From the reflectance spectra, CIE L*, a*, b* values were quantified and the total colour difference (ΔE) was calculated; clear visual discrimination was confirmed at doses of 50 mJ/cm² or higher. These results demonstrate that the Br-LMG/PVB film can serve as a simple, low-cost, field-deployable, immediate-readout UVC dosimeter requiring no additional equipment for dose assessment. }, issn = {3032-7059}, pages = {11} doi = {10.9767/jcerp.20725}, url = {https://journal.bcrec.id/index.php/jcerp/article/view/20725} }
Refworks Citation Data :
In this study, a novel UVC dosimeter based on a polyvinyl butyral (PVB) film containing bromo-leuco malachite green (Br-LMG) without any acid generator was fabricated, and its fundamental characteristics for 253.7 nm UVC dose measurement were comprehensively evaluated. Br-LMG/PVB films were irradiated with UVC doses of 0, 25, 50, 75, 100, 200 and 300 mJ/cm². The changes in optical density, dose–response linearity, post-irradiation short-term and long-term storage stability, and colour change were quantified using a UV-VIS spectrophotometer and a UV radiometer.
After UVC irradiation, the film exhibited a maximum absorption peak at 630 nm and a weak absorption peak at 430 nm, corresponding to the intrinsic absorption of Br-LMG. The dose–response curve showed excellent linearity (R² ≈ 1) over the entire 0–300 mJ/cm² range, and the sensitivity at 630 nm was calculated as 0.0031 (mJ/cm²)⁻¹. Under room-temperature storage for 30 days after irradiation, the optical density increased by only 5.2–9.2% compared with the immediate post-irradiation value, indicating satisfactory long-term stability. In addition, short-term stability evaluation revealed that for high doses (300 mJ/cm²), the optical density increased slightly from 0.95 to 1.03 within 5 min after irradiation and then remained stable, suggesting that a stabilisation time of at least 5 min is required for high-dose measurements.
From the reflectance spectra, CIE L*, a*, b* values were quantified and the total colour difference (ΔE) was calculated; clear visual discrimination was confirmed at doses of 50 mJ/cm² or higher. These results demonstrate that the Br-LMG/PVB film can serve as a simple, low-cost, field-deployable, immediate-readout UVC dosimeter requiring no additional equipment for dose assessment.
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The Journal of Chemical Engineering Research Progress is published by UPT Laboratorium Terpadu Universitas Diponegoro jointly with Masyarakat Katalis Indonesia - Indonesian Catalyst Society (MKICS) Publisher. The technical management of the JCERP journal is supported by with BCREC Publishing Group.
