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...
(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,...
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 ...
[关键词]航空丁腈橡胶； 丙烯腈； 定量分析； ATR-FTIR ； R 2237/967值 [中图分类号] TG157 [文献标志码] A doi ：10.3969/j.issn.1673-6214.2021.02.003[文章编号] 1673-6214(2021)02-0098-04 Identification of Aeronautical Nitrile Rubbers Based on ATR-FTIR ZHU Qiang-qiang...
There is evidence of considerable Cr(VI) in the rutile electrodes, relative to the basic ones, as shown in Table 2. However, there is uncertainty in the Cr(VI) due to the numerous digestion processes which are part of the sample preparation procedure (discussed earlier in the introduction se...
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...
Full size table Figure 3 Partial least square regression (PLSR) models for the prediction of lignin (A) and energy (B) content in extractive-free poplar wood exhibiting a natural range of variability. Lignin was measured with the acetyl bromide method. The energy content was determined with a...
1. INTRODUCTION Consumer needs for functional food are increasing, so it is necessary to make inventions and innovations based on existing local resources. The chosen food development is a plant with the local name onion, onion, Dayak or Tiwai which is believed by the Dayak people of ...
Theoretically, by comparing FTIR spectra of time-inactivated Anc2pHis and fully functional, noninhibited Anc2pHis, we could have some insights into the structural changes responsible for or concomitant with the reduction of the number of binding sites. However, the noninhibited Anc2pHis can have ...
Table 2. Functional groups and modes of vibration in ethanolic and aqueous extracts. Wavenumber (cm−1)Functional groupVibration mode 3292 OH Stretching (sym) 2929 and 2852 CH (CH2) Asymmetric & symmetric stretching vibration of methylene (CH2) group 2852 CH (CHO) Stretching (sym) 1734 CO ...