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使用激光诱导击穿光谱(LIBS)分析和分类异质肾结石。

Analysis and classification of heterogeneous kidney stones using laser-induced breakdown spectroscopy (LIBS).

机构信息

Laser Technologies Research and Application Center, Koaceli University, Turkey.

出版信息

Appl Spectrosc. 2012 Nov;66(11):1353-61. doi: 10.1366/12-06679.

Abstract

Kidney stones were analyzed using laser-induced breakdown spectroscopy (LIBS), utilizing a high resolution multi-channel charge-coupled device (CCD) spectrometer and a nanosecond-pulse Nd : YAG laser. The kidney stones were also characterized using X-ray diffraction (XRD) and X-ray fluorescence (XRF) techniques for comparative analysis. It was found that the ratio of hydrogen (H) to carbon (C) was an important indicator of organic compounds such as uric acid. Advantages of LIBS, especially with regards to amount of sample required and sample preparation as well as the ability to carry out elemental analysis and classification of kidney stones simultaneously, over other analytical techniques such as XRD and XRF are discussed. The common minor elements detected in the kidney stones include P, S, Si, Ti, and Zn. Principal component analysis (PCA) and partial least squares discriminant analysis (PLS-DA) of broadband LIBS spectra were employed for classifying different types of kidney stones. The results are beneficial in understanding kidney stone formation processes, which can lead to preventive therapeutic strategies and treatment methods for urological patients.

摘要

肾结石采用激光诱导击穿光谱(LIBS)进行分析,使用高分辨率多通道电荷耦合器件(CCD)光谱仪和纳秒脉冲 Nd:YAG 激光。还使用 X 射线衍射(XRD)和 X 射线荧光(XRF)技术对肾结石进行了特征分析,进行比较分析。结果表明,氢(H)与碳(C)的比值是尿酸等有机化合物的重要指标。讨论了 LIBS 的优点,特别是在所需样品量和样品制备方面,以及同时进行元素分析和肾结石分类的能力,优于 XRD 和 XRF 等其他分析技术。在肾结石中检测到的常见微量元素包括 P、S、Si、Ti 和 Zn。宽带 LIBS 光谱的主成分分析(PCA)和偏最小二乘判别分析(PLS-DA)用于对不同类型的肾结石进行分类。这些结果有助于了解肾结石的形成过程,从而为泌尿科患者制定预防性治疗策略和治疗方法。

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