Near-infrared spectroscopy combined with principal components analysis and a back propagation neural network identified Huanglongbing-infected Gannan navel orange leaves with an overall accuracy of 98.75%, outperforming LDA, KNN, and SVM models.
News|Webcasts|August 27, 2024
Theory and Applications of FTIR and UV-Vis Spectroscopy
Author(s)Thermo Fisher Scientific
Webinar Date/Time: Tue, Sep 17, 2024 10:00 AM ED
Light is utilized in a wide range of spectroscopic techniques and practices to gain a variety of information about materials and chemicals. These analyses can include material/chemical identification, quantitative analysis, quality control/quality assurance testing, and biological studies, among other applications. In these techniques, the wavelength of light used determines the type of transition that can be probed within the materials studied.
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Event Overview:
Light is utilized in a wide range of spectroscopic techniques and practices to gain a variety of information about materials and chemicals. These analyses can include material/chemical identification, quantitative analysis, quality control/quality assurance testing, and biological studies, among other applications. In these techniques, the wavelength of light used determines the type of transition that can be probed within the materials studied. Infrared (IR) radiation covers 800 to 100,000 nm and induces transitions between vibrational energy levels within a material. Ultraviolet-visible (UV-Vis) spectroscopy occurs at higher energy, from 190 to 900 nm, which promotes electrons to a higher electronic energy state. In this webinar, the theory of IR and UV-Vis spectroscopy will be discussed. Applications, along with sample handling for both spectroscopic techniques, will be outlined.
Key learning Objectives:
- Understand the theory behind FTIR and UV-Vis spectroscopy
- Learn sample handling techniques in spectroscopy
- Identify various applications in FTIR and UV-Vis spectroscopy
Speaker:
Andrew Schmitz, PhD
Application Scientist
Thermo Fisher Scientific
Andrew Schmitz, PhD, is an application scientist at Thermo Fisher Scientific and is approaching his third year of working with the company. A graduate of the University of Nevada, Reno, Schmitz has gained in-depth experience in both FTIR and 2-dimensional IR. At Thermo Fisher, Schmitz focuses on applications involving FTIR and UV-Vis. Currently, he runs the demonstration lab in Houston, Texas. The lab is used for demos, training, and feasibility for customers involving vibrational spectroscopy, UV-Vis, XRF, XRD, OES, and MaxIR.
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