文献类型：期刊文献

英文题名：Overcoming the fluorescent interference during Raman spectroscopy detection of microplastics

作者：Liu, Yu[1,2];Hu, Jiale[1];Lin, Liqian[1];Yang, Bing[1];Huang, Minhua[1];Chang, Min[1];Huang, Xiaoxin[2];Dai, Zhenqing[2,3];Sun, Shengli[1];Ren, Lei[2,4];Li, Chengyong[1,2,3]

机构：[1]Guangdong Ocean Univ, Sch Chem & Environm, Zhanjiang 524088, Peoples R China;[2]Guangdong Ocean Univ, Shenzhen Inst, Shenzhen 518108, Peoples R China;[3]Guangdong Ocean Univ, Guangdong Prov Key Lab Intelligent Equipment South, Zhanjiang 524088, Peoples R China;[4]Guangdong Ocean Univ, Coll Coastal Agr Sci, Zhanjiang 524088, Peoples R China

年份：2023

卷号：897

外文期刊名：SCIENCE OF THE TOTAL ENVIRONMENT

收录：SCI-EXPANDED(收录号：WOS:001047022000001)、、EI(收录号：20233114458559)、Scopus(收录号：2-s2.0-85166023196)、WOS

基金：This work was supported by the Project of Enhancing School with Inno-vation of Guangdong Ocean University (2020ZDZX2029, 2021ZDZX101) , Guangdong Basic and Applied Basic Research Foundation (2022B1515020091, 2021A1515010291) , Shenzhen Science and Technol- ogy Program (KCXFZ202002011011057, JCYJ20210324122606017, GJHZ20210705142000003) and Training Programs of Innovation and Entrepreneurship for Undergraduates (CXXL2022181) . We would like to thank Analytical and Testing Center of Guangdong Ocean University for Ra-man spectroscopic instrument.

语种：英文

外文关键词：Microplastics; Raman spectrometry; Fenton's reagent; Fluorescence quenching; Matched-degree

外文摘要：Owing to environmental concerns, microplastics pollution has been the object of increasing attention. Currently, the chemical composition of microplastics is commonly detected using Raman spectroscopy. Nevertheless, the Raman spectra of microplastics may be overlaid by signals derived from additives (e.g., pigment), resulting in serious interference. In this study, an efficient method is proposed to overcome the interference of fluorescence during Raman spectroscopic detection of microplastics. Four catalysts of Fenton's reagent (Fe2+, Fe3+, Fe3O4, and K2Fe4O7) have been investigated for their capacity to generate hydroxyl radical (& BULL;OH), thus potentially eliminating the fluorescent signals in microplastics. The results indicate that the Raman spectrum of microplastics treated with Fenton's reagent can be efficiently optimized in the absence of spectral processing. This method has been successfully applied to the detection of microplastics collected from mangroves, featuring a range of colours and shapes. Consequentially, after 14 h of treatment with sunlight-Fenton (Fe2+: 1 x 10- 6 M, H2O2: 4 M), the Raman spectra matching-degree (RSMD) of all microplastics were >70.00 %. The innovative strategy discussed in this manuscript can greatly promote the application of Raman spectroscopy in the detection of real environmental microplastics, overcoming interfering signals derived from additives.