ftir分析方法（FTIRanalysismethod）ftir分析方法（FTIR analysis method）Two, group frequency and characteristic absorption peak Each molecule of the constituent molecule has its specific infrared absorption region. According to the nature of chemical bond, which can be divided into four regions: 4000 - ...
岛津FTIR培训讲义 岛津FTIR-8400S/IRPrestige-21培训 岛津国际贸易（上海）有限公司 分析中心
By comparing the ‘fingerprint region’ of a obtained sample to that of a standard sample, researchers can also identify an unknown polymer. In the mean time, researchers can use FTIR to measure the concentration of a certain functional group, to determine the extent of reaction. For example,...
27、h band near 3000 cm-1.AROMATIC Look for the benzene, C:C, double bonds which appear as medium to strong absorptions in the region 1650-1450 cm1 The CH stretch band is much weaker than in alkenes5. If none of the previous groups can be identified, you may have an alkaneALKANE Th...
By comparing the fingerprint region of a obtained sample to that of a standard sample, researchers can also identify an unknown polymer. In t 3、he mean time, researchers can use FTIR to measure the concentration of a certain functional group, to determine the extent of reaction. For example...
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...
Fourier Transform Infra-red Spectroscopy (FTIR) is a well-established analytical technique for qualitative analysis, with the mid-infra-red (IR) region (4000 cm−1 to 400 cm−1) being rich in information about the presence of the functional groups. FTIR can also be used quantitatively, as...
Mid Infrared covers the region from about 200 to 5000 cm-1 Our FT spectrometers allow us to measure transitions from the visible (25,000 cm-1) through the far-IR (50 cm-1) spectral range. These regions yield specific information regarding functional groups, their associations and relative ...
Such interactions affect the bonding strength of the double bond between the C and the O atom in the functional groups, which is assumed to shift the wavenumber (WN) region of O–H (hydroxyl), C=O, COO, and OMcat (i.e., C=O interacting with cations plus O–H groups) absorption ...
You should note that many other functional groups have bands in this region which appear similar. * * * * * * * * * * C8H8O From the molecular formula, the compound has 5 degrees of unsaturation (five double bonds, carbonyls or rings). The large number suggests the possible presence ...