PerkinElmer Software -First take a background spectrum with the empty tube inside the FTIR spectrometer.-This will automatically save a background transmittance. Add 2-3 drops of HCl to the tube and reinsert it into the FTIR. In the top left corner set the wavenumber from 3500 cm-1 to ...
1. Introduction Characterized by wavelengths longer than the mid-infrared region, the far-infrared region is also referred to as the terahertz region. In recent years, this region has been used to evaluate crystal polymorphs for pharmaceuticals and semiconductor device materials, as well as for arch...
Seven conifer softwood samples including Pinus sylvestris and Ginkgo biloba were analyzed using Fourier transform infrared spectroscopy (FTIR). Results showed that the main FTIR absorption peaks of lignin, ce l- lulose and hemicellulose of the seven samples are close to each other, such as, the ...
表1 壁画涂层K-K变换反射红外光谱和ATR 红外光谱吸收峰位、 差值及归属 Table 1 The absorption peaks, Δ ν and assignments of coatings’ K-K-transformed reflection FTIR spectra and ATR FTIR spectra Figure Option 图6 庭院梧桐图涂层Py-GC/MS质谱图Fig.6 Mass spectra of Tingyuanwutong’ s coating...
Also, other distributed weak peaks appeared at 2950 cm−1 because of C–H present in CH2OH group; these peaks are typically the peak of filter paper [48]. It is worth mentioning that because of low concentration of melt blown filter in the milled sample, these peaks are characterized by...
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 Result of measured by difference Spectrum peaks cm-1 Theory wave number Measured wave number Without calibration error Has calibration error 9344909 9346499 08306 01590 9968054 9967433 05136 00621 1 1745080 1 1745074 02836 00006 14199726 14198755 01916 0097 1 ...
The strong ester peaks at 1750 (the C=O vibration) and around 1170 – 1200 cm-1 (C-O vibrations) are clear, and are the basis for the quantitative analysis method. There is no interference in the 1750 cm-1 region, but the petroleum signals do interfere with the 1170 – 1200 cm-1 ...
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...
FTIR定量分析聚乙二醇聚乙烯共混物组成