(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,...
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 ...
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...
macrocarpa, and the functional group assignment is summarized in Table 2. The whole range of FTIR raw spectra looks very similar by observation because of the similarity in chemical composition. That is, significant relationship within the FTIR spectra and α-glucosidase inhibition was not detected ...
The first three peaks in PC1 in the two data sets for energy and lignin samples were overlapping encompassing the carbohydrate region and a wavenumber for guaiacyl lignin (Additional file 1, Figure S1, Additional file 2, Table S1 and Additional file 3, Table S2). All other major peaks of ...
基于ATR-FTIR 的航空丁腈橡胶鉴别研究 朱强强 ， 王 静 （国营芜湖机械厂，安徽 芜湖 241000）[摘 要]以航空丁腈橡胶为研究对象，分析衰减全反射傅里叶变换红外光谱（ATR-FTIR ）鉴别丁腈橡胶的理论依据。橡胶试样经无水乙醇萃取、干燥和图谱定量后，统计分析多种牌号航空丁腈橡胶氰基（—C ≡N ）与—CH =CH...
A Dynamic Edit Distance Table In this paper we consider the incremental/decremental version of the edit distance problem: given a solution to the edit distance between two strings and ,... SR Kim,K Park - 《Journal of Discrete Algorithms》 被引量: 49发表: 2004年 加载更多来源...
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]...
Depending on the wave number, express the functional bond, and its groshownhows in Table 3 [26,27]. Table 3. Fourier-transform infrared spectroscopy peak values of Calotropis procera. NoPeak (wave number cm −1)IntensityBondFunctional group assignmentRemark an assignment 1 3391 Weak broad O...