Raman is also a vibrational spectroscopy technique that, in many cases, provides complementary information. Both techniques provide organic compound identification; and are not limited simply to functional group identification. The minimum spot size in Raman is 1 µm, significantly smaller than for F...
FTIR Basic Organic Functional Group Reference Chart (PDF) Functional groups are structural units within organic compounds defined by specific atom and bond arrangements. Infrared is a powerful identification tool for functional groups because of the similar absorption frequencies for those groups in dif...
Identification of trace evidence is one of the most challenging aspects, especially in criminal and road accident investigations, where automobile paint chips may acquit as substantial evidence. In a hit and run case, the trace evidence of automobile paint can be found from the victim as well as...
Identification of liquid and solid materials Classification of plastics Calculating the extent of reaction of glues Comparison between samples The Superiority of iST 1 Can analyze samples about tens of microns by FTIR microscope system 2 Open sample platform capable of placing 12″ wafer ...
These types of absorbances are typically seen below 1500cm-1 in the infrared spectrum; however, some functional groups will absorb in this region as well. As a result, this region of the spectrum is less reliable for identification, but the absence of a band is often more indicative than...
The identification of these compounds was done by carefully identifying the Cr-O-Cr anti-symmetric vibrations, the symmetric stretching of the CrO4 tetrahedra, and the stretching vibrations of the planar CrO3 structure for the chromium trioxide. All the above compounds were volatile, and present as...
functional areas (4000 - 1300cm-1) and fingerprint areas (1300 - 600cm-1). The characteristic absorption peak of the group usually appears in the functional group, and the absorption peak is sparse, which is beneficial to the analysis, and is the most useful area for the identification of...
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TG-FTIR分析技术在PVC热降解过程研究中的应用
functional groups –CH2and –CH3(alternately symmetrical and asymmetrical). Vibrations with a maximum of ~ 3335 cm−1may also originate from carboxylic acids, the irregular absorption of which (with a wide band coming from the vibrations of the –OH group) significantly increases the C–H...