Group frequencies are characteristic of small groups of atoms or functional groups such as CH₂, OH, and C=O. These types of bands are typically seen above 1,500cm-1 in the infrared spectrum and they’re usually unique to a specific functional group, making them a reliable means of iden...
Figure 4. FTIR Spectroscopy functional group correlation table Near-IR Spectroscopy The Near-IR portion of the electromagnetic spectrum falls between 4,000 to 12,800 cm-1. This region consists of overtones (two of the same vibrational modes occurring simultaneously) and combinations (two different ...
aA relative extensive, comprehensive of interpretation of FTIR spectral has been tabulated in Table 1, which offers a detailed description of spectral frequencies of the organic functional group and elemental composition. 正在翻译,请等待...[translate]...
3). Due to complexation, the functional group IR spectral range shifted shown in Table 1. The shifting of the IR band is a conformation study to the complexation. In the overall process mainly groups and functional groups are shifted to the complexation process. Download: Download high-res ...
(Irtran-4) 1.0-19.5 10,000-515 2.41 Insoluble Polyethylene (high density) 16-333 625-30 1.54 (at 5,000 cm-1) Insoluble 窗片的选择和使用 红外官能团区域表Infrared Functional Group Table 固体样品测量 固体样品的制备和测试 固体样品可以有各种不同的形态,有粉末样品,有颗粒状、块状样品,也有薄膜,...
Sixteen bands from the processed IR spectra were selected considering their constant occurrence in the LVs and PCs with maximum discrimination of classes (Table 6). Table 6. List of the main bands interacting in the model classification. Wavenumber (cm−1)Vibration modeBase groupCoreTransition...
Area values are higher in the control group spectra than in the spectra of ASD + children. Full size table Origin of the absorbance difference in the 3000–2600/cm region The source(s) of this difference in absorbance between the ASD+ and TD children is not certain; however, based ...
corresponded to lipids functional groups (Figs 1 and 2, Table 1). The altered lipid content in this group, among other reasons, can be a result of increased concentration of lipid hydroperoxide (LOOH). This enzyme is one of the markers of oxidative stress19,20 and is responsible for ...
Table 2. Prediction ability of lard in palm oil by ATR-FTIR. Spectral region (cm−1)Baseline typeFactorsR2RMSECRMSECVRMSEP 1118–1096 None 1 0.9861 1.98 3.67 0.978 1250–1150 None 1 0.9772 2.64 1.73 0.989 1128–1259 None 2 0.9671 1.19 2.98 0.963 3067–2745 None 4 0.9188 0.469 2.34 0.953...
Table 3. Vibration peaks of analytical grade compounds found in welding fumes and their vibration mode. CompoundsIR Absorption frequency (cm−1)Functional groupsRef. Potassium Dichromate 555 Cr-O-Cr anti symmetric [28], [29], [31], [32], [43] 566 Cr-O-Cr anti symmetric [29], [32]...