This study presents a novel analytical method for the quantitative and qualitative analysis of microplastics (MPs) in deionized (DI) water using Raman spectroscopy. Raman peak area ratios of 1295 cm⁻¹ for polyethylene (PE) and 637 cm⁻¹ for polyvinylchloride (PVC) to the broad H₂O peak were utilized to establish a calibration model for the concentration of MPs dispersed in DI water at 0.1 wt% to 1.0 wt%. The calibration model demonstrated R² values of 0.98537 for PE and 0.99511 for PVC, indicating high linearity between the peak area ratio and concentration. The calibration model was validated using mixed PE and PVC samples to confirm its applicability to real-world water bodies, where multiple types of MPs are present. The calculated standard error of calibration (SEC) and relative standard error of calibration (%RSEC) values further confirmed the accuracy of the predictions, providing a robust approach for detecting and quantifying MPs in aquatic environments.

本研究提出了一种使用拉曼光谱对去离子 （DI） 水中塑料微粒 （MP） 进行定量和定性分析的新型分析方法。聚乙烯 （PE） 的拉曼峰面积比为 1295 cm⁻¹，聚乙烯 （PVC） 的拉曼峰面积比为 637 cm⁻¹，与宽 H₂O 峰的拉曼峰比用于建立分散在去离子水中 0.1 wt% 至 1.0 wt% 的 MP 浓度的校准模型。校准模型显示，PE 的 R 2 值为 0.98537，PVC 的 R² 值为 0.99511，表明峰面积比和浓度之间存在高线性。校准模型使用 PE 和 PVC 混合样品进行了验证，以确认其适用于存在多种类型 MP 的实际水体。计算的校准标准误差 （SEC） 和校准的相对标准误差 （%RSEC） 值进一步证实了预测的准确性，为检测和量化水生环境中的 MP 提供了一种可靠的方法。