在新鲜尿液的FTIR分析中遇到的光谱变异性的评估
Elie Sarkees1, Vincent Vuiblet2, Olivier Piot1
1Université de Reims Champagne-Ardenne, BioSpecT UR7506, Reims, France.
Talanta
|August 1, 2025
概括
尿液红外光谱显示了由于实验因素的高变化. 尿液的pH显著影响光谱特征,特别是在液相 (T1) 期间,因此需要标准化协议来可靠地发现诊断生物标志物.
科学领域:
- 生物医学光谱学 生物医学光谱学
- 分析化学 分析化学
- 诊断生物标志物 诊断生物标志物
背景情况:
- 红外吸收光谱为疾病检测提供了高化学特异性.
- 尿液是一种有价值的生物流体,用于识别反映身体病理生理状态的诊断生物标志物.
- 尿样的高变异性使得由于生物和实验因素,光谱标记物识别变得复杂.
研究的目的:
- 评估实验参数对尿液红外光谱信号的影响.
- 研究特定时间间隔 (T1:干燥前,T2:干燥后) 对光谱变异性的影响.
- 为了改善诊断应用,识别导致尿液光谱变化的关键因素.
主要方法:
- 红外吸收光谱法用于分析尿样.
- 确定了尿液的主要成分 (尿素,肌素,尿酸),并将其分配到红外波段.
- 主要成分分析 (PCA) 用于分析来自健康志愿者的样本中的光谱变异性.
- 评估了尿液pH值和两个时间间隔 (T1,T2) 对光谱形状的影响.
主要成果:
- 发现尿液的红外光谱形状受到尿液pH的强烈影响.
- 与T2 (干燥后) 相比,T1间隔 (液态阶段) 的光谱变异性显著更大.
- 实验参数,特别是pH值和预干燥阶段,对尿液光谱变异性有很大影响.
结论:
- 标准化实验参数,特别是尿液pH值和干燥前处理时间,对于最小化尿液红外光谱的变化至关重要.
- 提供了尿液光谱分析的建议,以提高光谱诊断标记物的可靠性.
- 这项研究强调了控制实验条件对于基于尿液的可靠光谱诊断的重要性.
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