You can keep your students engaged and working efficiently with the intuitive Nicolet Summit FTIR Spectrometer or other Nicolet series FTIR spectrometers and lesson plans that help you demonstrate everything fro
On the other hand, fewer numbers of peaks are observed in the absorption spectra of soot precursor particles. Baseline method of quantitative analysis is used to compare the concentrations of different functional groups in the structures of the particles. Significant aliphatic and carbonyl ...
Spectral library searching based on digital matching of spectral signatures is a highly effective way of performing qualitative identification of compounds. Because FTIR and Raman spectroscopic signatures are based on molecular functio...
Fig. 2. PLS-DA plot based on selected FTIR peaks to differentiate pericarp colour showing (A) PLS-DA of brown, red, purple and variable purple whole grain rice and (B) variable of importance (VIP) scores of selected functional groups. (For interpretation of the references to colour in thi...
Routine FTIR analysis often associates specific peaks with the presence of specific functional groups; however, given the physical phenomena behind these signals, there is much far more information present. Underutilized information includes but is not limited to insights into hydrogen bonding (whether ...
The peaks, which are also called absorbance bands, correspond with the various vibrations of the sample’s atoms when it’s exposed to the infrared region of the electromagnetic spectrum. For mid-range IR, the wave number on the infrared spectrum is plotted between 4,000 to 400 cm-1. The...
These peaks indicate the release of water (m/z 17 and 18) as well as ammonia (m/z 15, 16, 17). The overlap of the fragment ions of water and ammonia make the interpretation of the mass spectra rather difficult. Discussion of the TGA-FTIR Results The TGA results of the TGA-FTIR ...
The positive peaks indicate higher absorbance with respect to the average control, whereas the negative peaks indicate lesser absorbance. In a previous study, it has been shown that the spectra of the healthy children population show the least intensity variations compared to other age groups32....
View your Nicolet .spa spectral files, label spectra peaks, and correct spectra baseline all in the OMNIC Anywhere App on your PC, Apple computer, Android, or iOS device. Add more storage space. Start with 10 GB of storage...
In addition to transmission FTIR, attenuated total reflection (ATR) FTIR and diffuse reflectance infrared spectroscopy are also extensively utilized for DOM characterization (Derrien et al., 2019a; Minor et al., 2014). However, absorption peaks of multiple functional groups usually coexist, ...