拉曼光谱法评估骨的成分。
Compositional assessment of bone by Raman spectroscopy.
机构信息
Department of Mechanical Engineering, Karamanoglu Mehmetbey University, Karaman, 70200, Turkey.
Department of Bioengineering, Karamanoglu Mehmetbey University, Karaman, Turkey 70200.
出版信息
Analyst. 2021 Dec 6;146(24):7464-7490. doi: 10.1039/d1an01560e.
Raman spectroscopy (RS) is used to analyze the physiochemical properties of bone because it is non-destructive and requires minimal sample preparation. With over two decades of research involving measurements of mineral-to-matrix ratio, type-B carbonate substitution, crystallinity, and other compositional characteristics of the bone matrix by RS, there are multiple methods to acquire Raman signals from bone, to process those signals, and to determine peak ratios including sub-peak ratios as well as the full-width at half maximum of the most prominent Raman peak, which is nu1 phosphate (νPO). Selecting which methods to use is not always clear. Herein, we describe the components of RS instruments and how they influence the quality of Raman spectra acquired from bone because signal-to-noise of the acquisition and the accompanying background fluorescence dictate the pre-processing of the Raman spectra. We also describe common methods and challenges in preparing acquired spectra for the determination of matrix properties of bone. This article also serves to provide guidance for the analysis of bone by RS with examples of how methods for pre-processing the Raman signals and for determining properties of bone composition affect RS sensitivity to potential differences between experimental groups. Attention is also given to deconvolution methods that are used to ascertain sub-peak ratios of the amide I band as a way to assess characteristics of collagen type I. We provide suggestions and recommendations on the application of RS to bone with the goal of improving reproducibility across studies and solidify RS as a valuable technique in the field of bone research.
拉曼光谱(RS)用于分析骨的物理化学性质,因为它是非破坏性的,且所需的样品制备量很少。经过二十多年的研究,涉及通过 RS 测量骨基质的矿物质-基质比、B 型碳酸根取代、结晶度和其他组成特征,有多种方法可以从骨中获取拉曼信号,对这些信号进行处理,并确定峰比,包括次峰比以及最显著拉曼峰 νPO 的半峰全宽。选择使用哪种方法并不总是很清楚。本文描述了 RS 仪器的组成部分,以及它们如何影响从骨中获取的拉曼光谱的质量,因为采集的信噪比和伴随的背景荧光决定了拉曼光谱的预处理。我们还描述了为确定骨基质特性而对获取的光谱进行预处理的常见方法和挑战。本文还为通过 RS 分析骨提供了指导,展示了预处理拉曼信号的方法和确定骨成分特性的方法如何影响 RS 对实验组之间潜在差异的敏感性。还关注了用于确定酰胺 I 带次峰比的解卷积方法,这是评估 I 型胶原特征的一种方法。我们就 RS 在骨中的应用提出了建议和建议,目的是提高研究之间的可重复性,并将 RS 确立为骨研究领域的一项有价值的技术。
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