酸消化对通过FTIR和拉曼光谱识别微塑料的定量和定性影响,对环境样本的影响
Karli Sipps1,2, Shreya Patil3,4, Lilia Ochoa3
1Department of Chemistry, Rutgers, The State University of New Jersey, Camden, NJ, USA.
Analytical and bioanalytical chemistry
|October 5, 2023
概括
用于微塑料提取的酸消化可以导致显著的质量损失和改变聚合物特性. 这影响了微塑料的准确识别和量化,影响了生态研究.
科学领域:
- 环境科学 环境科学
- 分析化学 分析化学
- 聚合物科学 聚合物科学
背景情况:
- 微塑料的量化需要有效的提取方法,以保持聚合物完整性.
- 酸消化是一种常见的方法,用于从微塑料样本中去除生物干扰.
- 关于酸消化对微塑料光谱分析的影响的指导是有限的.
研究的目的:
- 评估酸消化对各种常见聚合物的影响.
- 评估酸处理前后微塑料的光谱识别的准确性.
- 为在酸性消化后进行微塑料分析提供建议.
主要方法:
- 使用了富里埃变换红外光 (FTIR) 和/或拉曼光谱学.
- 分析了50多种常见的消费品,包括织品.
- 使用两个软件包,比较了酸消化前后的光谱数据.
主要成果:
- 几种聚合物 (尼龙-66,聚氧甲,聚氨,聚烯,烯,烯,聚甲基甲酸) 经历了≥90%的质量损失.
- 其他聚合物显示颜色,形态和尺寸的变化.
- 频谱识别的准确性各不相同,根据值,正确的最佳命中匹配率从30-78%不等.
结论:
- 酸消化可以显著改变微塑料的特性,影响大小和形态的评估.
- 频谱解释的准确性受到损害,可能导致聚合物的错误识别.
- 仔细考虑消化效应对于可靠的微塑料量化和生态影响研究至关重要.
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