Abstract Based on the concept of project-based learning, an extended experiment on “digital colorimetric measurement of ultraviolet rays intensity” was designed. The ultraviolet rays catalytic reaction was used to produce ultraviolet rays light-sensitive test strips; the exposure time of the test strips was changed to produce standard colorimetric cards. Using digital imaging, the R-value and absorbance of the standard colorimetric card were measured and a standard curve was plotted. It was eventually used to compare the sun protection effects of SPF50 sunscreen, SPF20 sunscreen, sunscreen clothes, sunshade, body lotion and Vaseline. The experiment was task-driven, highly open, integrated across disciplines and the results were materialised.
ZHU Yu-Lin. Digital Colorimetric Measurement of Ultraviolet Rays Intensity Based on Project-Based Learning[J]. Chinese Journal of Chemical Education, 2023, 44(1): 102-106.
