封面图片
2022年, 第16卷 第12期
Front Cover Story (See: Yunpeng Xing, Boyuan Xue, Yongshu Lin, Xueqi Wu, Fang Fang, Peishi Qi, Jinsong Guo, Xiaohong Zhou, 2022, 16(12): 155)
Due to the low cost, high versatility, easy miniaturization, and widespread ownership of cellphones, colorimetric analysis technologies for the commercial cellphone platform have got wide attention in in-field rapid environmental monitoring. This work demonstrates a cellphone-based colorimetric multi-channel sensor to detect multiple environmental contaminants simultaneously with high sensitivity and stability. To improve the sensitivity of the sensor, a delicate optical path system was created by using a diffraction grating to split six white beams transmitting through the multiple-colored samples, which allows the cellphone CMOS camera to capture the diffracted light for image analysis. The proposed sensor is a universal colorimetric detection platform for a variety of environmental contaminants with the colorimetry assay in the range of 400-700 nm. As a successful proof-of-concept, the sensor was used to detect turbidity, ammonia nitrogen, orthophosphate, and three heavy metals simultaneously with high sensitivity and reliability. The miniature sensor demonstrated in-field sensing ability in environmental monitoring, which can be extended to point-of-care diagnosis and food safety control.[展开] ...
ISSN 2095-2201N (Print)
ISSN 2095-221X (Online)
CN 10-1013/X
Postal Subscription Code 80-973
原刊名 Frontiers of Environmental Science & Engineering in China 2018 Impact Factor: 3.883