[讲解]ftir剖析方法 FTIR分析方法 二、基团频率与特征吸收峰 组成分子的各个基团均有其特定的红外吸收区域。根据化学健的性质，可将其分为四个区：4000 - 2500 cm-1 氢键区；2500 - 2000 cm-1 参键区；2000 - 1500 cm-1 双键区；1500 - 1000 cm-1 单键区。按吸收的特征，又可分为官能团区（4000 - ...
大多数有机物化学键的基频振动均在4000~400cm-1的红外波长区域出现,通过检测官能团的特征吸收可以对有机物进行定性和定量分析。食用油含有丰富C、H、O元素,在FTIR中有较好的响应,其主要FTIR特征吸收峰(b)和肩峰(s)吸收情况见表1。 表1 食用油FTIR主要特征吸收峰(b)和...
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 - 2500 cm-1 - 2000 cm-1 2500 ...
43min时3000-2800cm-1,2400-2300cm-1,1800-1700cm-1处的峰值达到最大,这和DTG曲线完全一致。从图2中可以看出,在2900cm-1附近出现了强吸收峰,经分析是烷基和CO2的吸收峰,而在1710.88cm-1出现的强吸收峰应为酰胺基的吸收峰,928 cm-1和961cm-1的吸收峰为酰胺IV的CONH变形振动吸收峰。结合PA6的主链结构可...
饱和烃和醛类的吸收波长低于 3000cm-1 ,由此可区分饱和烃和不饱烃。 C) 参键和累积双键区( 2400-2100cm-1 ) 本区的谱带较少。主要吸收带有: D) 羰基伸缩振动区( 1900-1650cm-1 ) 羰基最常出现的区域是 1755-1670cm-1 , 常为红外谱中最强的吸收峰, 非常特征。故ν C=O 吸收是确定化合物中有无...
根据化学健 的性质,可将其分为四个区:4000-2500cm-1氢键区;2500-2000 cm-1参键区;2000-1500cm-1双键区;1500-1000cm-1单键 区。按吸收的特征,又可分为官能团区(4000-1300cm-1)和指纹 区(1300-600cm-1)。基团的特征吸收峰一般出现在官能团区,且 吸收峰较稀疏,利于分析,是基团鉴定最有用的区域。而后...
(C) parametric bonds and accumulated double bond regions (2400-2100cm-1) There are less bands in this region. Main absorption with: (D) carbonyl stretching vibration zone (1900-1650cm-1) The most common region of the carbonyl group is 1755-1670cm-1, which is often the strongest ...
which may vary from 4000 to 400 cm-1. The sample is placed in a holder in the path of the IR source. A detector reads the analog signal and converts the signal to a spectrum. A computer is used to analyze the signals and identify the peaks.Figure 1 - MSE FTIR in Mueller 170 ...
As the brain rat tissue is concerned, the FT-IR measurements, performed in the CH–OH vibrational stretching region (2400–3800 cm−1), permitted us to reveal the presence of a very diffuse commercial benzodiazepine: VALIUM® . The comparison between the spectral features of normal brain ...
1 选择谱图(可对若干张谱图同时进行基线校正),再选择校正方法和校正点,点 Correct。经校正处理后的谱图自动覆盖原谱图。 Scattering Correction Rubberband Correction Exclude CO2Bands:扣除CO2谱段。选择此项,基线校正时对包含CO2的波段(2400〜2275cm-1、680〜660cm-1)不予计算。 一,旧 2 选择谱图及需要标...