Vibrational spectroscopy and non-parametric analysis for biodegradation evaluation: The acrylic-emulsion paint scenario

In this work, we utilized Raman spectroscopy, characterized by excellent lateral resolution, in capturing the degradation of paints was investigated. Six fresh and six spoilt acrylic emulsion paint samples obtained from a paint company in Lagos, Nigeria and were used for this study. They were analyzed for microbial population and types using total viable count method and analytical profile index (API20E &20NE). Physicochemical quality markers [transmittance (TR), pH, OD600, and specific gravity (SG)] of the paints were evaluated by standard methods. Raman spectroscopy was deployed to analyze components of both fresh and spoilt paint samples. Lead (Pb) concentrations were assessed using atomic absorption spectrophotometry.

本研究采用具有优异横向分辨率的拉曼光谱（Raman spectroscopy），对涂料的降解过程展开探究。本研究使用从尼日利亚拉各斯一家涂料公司获取的6份新鲜丙烯酸乳液涂料样品与6份变质丙烯酸乳液涂料样品。采用总活菌计数法及分析轮廓指数（analytical profile index, API20E、API20NE），对样品的微生物种群与种类进行分析；采用标准方法对涂料的理化质量指标进行评估，指标包括透光率（transmittance, TR）、pH值、OD600及比重（specific gravity, SG）；采用拉曼光谱对新鲜与变质涂料样品的组分进行分析；采用原子吸收分光光度法测定样品中的铅（Pb）浓度。