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Examination of pterins using surface-enhanced Raman spectroscopy using low-volume samples

机译：使用小批量样品使用表面增强拉曼光谱检查蝶呤

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Raman spectroscopy is a very useful tool for analysing compounds, however its ability to detect low concentrations of a substance are very limited. Surface Enhanced Raman Spectroscopy (SERS) overcomes that issue and is reported to have achieved single molecule detection. Its main shortcoming is the reproducibility of SERS spectra. The variation in signal strength prevents SERS from being usable as a quantitative analytical technique. This variability have been investigated in this work and key factors in improving reproducibility have been considered. Pterins, such as xanthopterin are studied in this paper. Pterins are a group of biological compounds that are found in nature in colour pigmentation and in mammal's metabolic pathways. Moreover, they have been identified in abnormal concentrations in the urine of people suffering from certain kinds of cancer. The potential for pterin's use as a cancer diagnostic points to the importance of SERS detection for pterins.
机译：拉曼光谱法是分析化合物的非常有用的工具，但是它检测低浓度物质的能力非常有限。表面增强拉曼光谱（SERS）克服了这个问题，据报道已经实现了单分子检测。它的主要缺点是SERS光谱的可重复性。信号强度的变化使SERS不能用作定量分析技术。在这项工作中已经研究了这种可变性，并且已经考虑了提高再现性的关键因素。本文研究了黄嘌呤等蝶呤。蝶呤是一组生物化合物，它们在自然界中存在于色素沉着和哺乳动物的代谢途径中。而且，已经在患有某些癌症的人的尿液中以异常浓度鉴定出它们。蝶呤用作癌症诊断的潜力指出了对蝶呤进行SERS检测的重要性。

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