Evaluating the reproducibility and consistency of different sample preparation techniques used for ATR-FTIR spectroscopy from the RILEM 295-FBB TG1 round robin test

IF 3.9 3区 工程技术 Q2 CONSTRUCTION & BUILDING TECHNOLOGY
Johannes Mirwald, Sadaf Khalighi, Aikaterini Varveri, Bernhard Hofko, Dheeraj Adwani, Augusto Cannone-Falchetto, Michael Elwardany, Rita Kleiziené, Katarzyna Konieczna, Maciej Maliszewski, Virginie Mouillet, Sayeda Nahar, Nathalie Piérard, Georgios Pipintakos, Laurent Porot, Kristina Primerano, Aditi Sharma, Pejoohan Tavassoti, Sandra Weigel, Jens Wetekam, Jiqing Zhu
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引用次数: 0

Abstract

Attenuated Total Reflection Fourier Transform Infrared spectroscopy has become a popular spectroscopic technique in bituminous binder analysis. However, comparable results are not obtainable yet due to differences in devices, measurement routines, sample preparation procedures, and spectral evaluation. Thus, the Task Group 1 of the RILEM TC 295-FBB: “Fingerprinting bituminous binders using physicochemical analysis” focuses on bringing this method towards pre-standardization. This study evaluates the reproducibility and consistency from round robin test, where 21 participating laboratories performed six different preparation techniques on three different binders in an unaged, short-term, and long-term aged state. A total of 6461 spectra were recorded and evaluated for their mean, standard deviation and coefficient of variation (CV) in the spectral region between 1800 and 600 cm−1. The results show that the solid sample preparation methods provide excellent reproducibility, with a coefficient of variation below 2%. Only the solvent method showed a higher coefficient of variation at 7.18%. Outliers with a high CV were detected and categorized into two groups: one where only one of the four samples differed and the other where all 16 spectra showed slight scattering in the overall absorption. The consistency of the method is significantly influenced by the accuracy of sample preparation, which is crucial for minimizing differences in slope, baseline, and noise in the spectra. These findings show the excellent reproducibility of these sample preparation methods and will be further examined to establish universal indices for evaluating effects such as ageing, bringing the method closer towards standardization.

从RILEM 295-FBB TG1循环试验中评估不同样品制备技术用于ATR-FTIR光谱的再现性和一致性
衰减全反射傅立叶变换红外光谱技术已成为沥青粘结剂分析中常用的光谱技术。然而,由于设备、测量程序、样品制备程序和光谱评估的差异,尚无法获得可比的结果。因此,RILEM TC 295-FBB的第1任务组:“使用物理化学分析对沥青粘合剂进行指纹识别”的重点是将这种方法推向预标准化。本研究评估了循环试验的可重复性和一致性,其中21个参与试验的实验室在未老化、短期和长期老化状态下对三种不同的粘合剂进行了六种不同的制备技术。共记录了6461个光谱,并对光谱区域1800 ~ 600 cm−1的平均值、标准差和变异系数(CV)进行了评估。结果表明,固体样品制备方法重现性好,变异系数小于2%。只有溶剂法的变异系数较高,为7.18%。检测到具有高CV的异常值并将其分为两组:一组是四个样品中只有一个样品不同,另一组是所有16个光谱在总体吸收中显示轻微散射。该方法的一致性受到样品制备精度的显著影响,这对于最小化光谱中斜率、基线和噪声的差异至关重要。这些发现表明这些样品制备方法具有良好的再现性,并将进一步研究建立通用指标来评估老化等影响,使该方法更接近标准化。
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来源期刊
Materials and Structures
Materials and Structures 工程技术-材料科学:综合
CiteScore
6.40
自引率
7.90%
发文量
222
审稿时长
5.9 months
期刊介绍: Materials and Structures, the flagship publication of the International Union of Laboratories and Experts in Construction Materials, Systems and Structures (RILEM), provides a unique international and interdisciplinary forum for new research findings on the performance of construction materials. A leader in cutting-edge research, the journal is dedicated to the publication of high quality papers examining the fundamental properties of building materials, their characterization and processing techniques, modeling, standardization of test methods, and the application of research results in building and civil engineering. Materials and Structures also publishes comprehensive reports prepared by the RILEM’s technical committees.
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