Baseline matching preprocessing of temperature perturbation infrared spectra

IF 2.7 3区 化学 Q2 CHEMISTRY, ANALYTICAL
Robert L. White
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引用次数: 0

Abstract

An infrared spectrum baseline matching procedure that compensates for measurement drift and eliminates sloping baselines from sequentially acquired spectra is described. The theory underlying this procedure is provided and examples are given for three implementations based on infrared spectrum data sets containing at least 100 successively measured spectra. Consecutive spectra were acquired when the infrared beam contained: no sample, poly(styrene) powder, and a poly(styrene) film. The first two data sets consisted of 120 spectra and were used to characterize instrument reproducibility and identify short- and long-term measurement drifts. The 200 infrared spectra obtained while heating and then cooling a poly(styrene) film were subjected to baseline matching to reveal subtle temperature-dependent changes that are not evident when overlayed spectra are displayed. Baseline matching preprocessing is easily implemented on large numbers of similar spectra by using macro programming.

Abstract Image

温度摄动红外光谱的基线匹配预处理。
描述了一种红外光谱基线匹配程序,该程序补偿了测量漂移并消除了顺序获取光谱的倾斜基线。提供了该过程的理论基础,并给出了基于包含至少100个连续测量光谱的红外光谱数据集的三种实现实例。当红外光束中含有:无样品、聚苯乙烯粉末和聚苯乙烯薄膜时,获得连续光谱。前两个数据集由120个光谱组成,用于表征仪器的可重复性,并确定短期和长期的测量漂移。在加热和冷却聚苯乙烯薄膜时获得的200个红外光谱进行基线匹配,以揭示在显示叠加光谱时不明显的细微温度依赖变化。采用宏编程的方法可以很容易地对大量相似光谱进行基线匹配预处理。
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来源期刊
Analytical Methods
Analytical Methods CHEMISTRY, ANALYTICAL-FOOD SCIENCE & TECHNOLOGY
CiteScore
5.10
自引率
3.20%
发文量
569
审稿时长
1.8 months
期刊介绍: Early applied demonstrations of new analytical methods with clear societal impact
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