School of Chemistry and Environment, Guangdong Ocean University, Zhanjiang 524088, China; Shenzhen Institute of Guangdong Ocean University, Shenzhen 518108, China.
School of Chemistry and Environment, Guangdong Ocean University, Zhanjiang 524088, China.
J Hazard Mater. 2022 Oct 15;440:129803. doi: 10.1016/j.jhazmat.2022.129803. Epub 2022 Aug 18.
In the field of microplastics research, more accurate standardised methods and analytical techniques still need to be explored. In this study, a new method for the microplastics quantitatively and qualitatively analysis by two-phase (ethyl acetate-water) system combined with confocal Raman spectroscopy was developed. Microplastics can be separated from false-positive microplastics in beach sand and marine sediment, attributing to the hydrophobic-lipophilic interaction (HLI) of the two-phase system. Results show that the recovery rates of complex environment microplastics (polypropylene (PP), polyethylene terephthalate (PET), polyvinyl chloride (PVC), polyamide 66 (PA 66), polycarbonate (PC) and polyethylene (PE)) are higher than 92.98%. Moreover, the new technique can also be used to detect hydrophobic and lipophilic antibiotics, such as sulfamethoxazole (SMX), erythromycin (EM), madimycin (MD), and josamycin (JOS), which adsorbed on microplastics and are extracted based on the dissolving-precipitating mechanism. This innovative research strategy provides a new scope for further detection of marine environment microplastics and toxic compounds adsorbed on its surface.
在微塑料研究领域，仍需要探索更准确的标准化方法和分析技术。本研究开发了一种新的两相（乙酸乙酯-水）系统结合共焦拉曼光谱法对微塑料进行定量和定性分析的方法。该方法基于两相系统的疏水-亲脂相互作用（HLI），可将海滩砂和海洋沉积物中的假阳性微塑料与微塑料分离。结果表明，复杂环境微塑料（聚丙烯（PP）、聚对苯二甲酸乙二醇酯（PET）、聚氯乙烯（PVC）、聚酰胺 66（PA 66）、聚碳酸酯（PC）和聚乙烯（PE））的回收率均高于 92.98%。此外，该新技术还可用于检测疏水性和亲脂性抗生素，如磺胺甲恶唑（SMX）、红霉素（EM）、麦迪霉素（MD）和交沙霉素（JOS），这些抗生素可通过溶解-沉淀机制吸附在微塑料上并被提取。这项创新研究策略为进一步检测海洋环境微塑料及其表面吸附的有毒化合物提供了新的思路。
