傅里叶变换红外光谱技术的应用及进展

傅里叶变换红外光谱(FTIR)技术具有扫描速度快、分辨率和灵敏度较高的优点,广泛应用于机理研究、性能表征、成分检测等研究领域。根据不同的检测需求,研究者们在使用FTIR技术时也作了相应的调整和优化。简单介绍了FTIR技术的原理,重点总结了近年来FTIR技术在各研究领域的应用现状。并指出与其他分析技术联用、建立数学模型以及标准化是除提升仪器自身精度外,提高FTIR测量准确度的发展趋势,这为FTIR在相关领域的研究和应用提供了参考。     

红外光谱法测定聚乙烯醇结晶度的研究

基于红外光谱技术,通过计算聚乙烯醇(PVA)在1 142,1 093 cm–1处的吸收峰面积,建立了一种测定PVA结晶度的傅立叶变换红外光谱(FTIR)分析方法。对比分析了不同制样方法所得的FTIR谱图;探讨了氢键对PVA结晶度的影响。结果表明,FTIR分析方法能有效测定PVA的结晶度;采用薄膜法制样更适合所建立的FTIR分析方法;延长退火时间、升高退火温度能减弱氢键对PVA结晶度的影响。     

付里叶变换红外光谱仪应用于HMX固相转变动力学研究

一、前言付里叶变换红外光谱仪(以下简称FTIR)是从七十年代初开始应用的一种先进的分析仪器。FTIR是随着近代电子工业和计算机技术的发展而兴起的,它的各项性能指标方面都大大地超过了原有色散型红外光谱仪。FTIR具有扫描快(45次/秒)、灵敏度高、分辨率高、没有样品加热和样品辐射、杂散光低等优点。FTIR的核心部件是迈克尔逊干涉仪和电     

付里叶变换红外光谱仪应用于HMX固相转变动力学研究

一、前言付里叶变换红外光谱仪(以下简称FTIR)是从七十年代初开始应用的一种先进的分析仪器。FTIR是随着近代电子工业和计算机技术的发展而兴起的,它的各项性能指标方面都大大地超过了原有色散型红外光谱仪。FTIR具有扫描快(45次/秒)、灵敏度高、分辨率高、没有样品加热和样品辐射、杂散光低等优点。FTIR的核心部件是迈克尔逊干涉仪和电     

用FTIR测定输氧管线脱脂后的残油含量

介绍了FTIR在测定氧压机附件及输氧管线脱脂后残留油含量的应用原理,样品的采取方法,标准溶液的配制,标准曲线的制作,定量计算方法,指出了应用FTIR的注意事项。     

FTIR在测定输氧管线脱脂后残油含量中的应用

介绍了傅立叶变换红外光谱仪（FTIR）在测定氧压机附件及输氧管线脱脂后残留油含量的应用原理，样品的采取方法，标准溶液的配制，标准曲线的制作，定量计算方法，指出了应用FTIR的注意事项。     

遥感FTIR光谱技术在固体推进剂羽焰测试中的应用

介绍了遥感傅立叶变换红外光谱测试技术的优点,综述了遥感FTIR光谱技术在固体推进剂羽焰红外绝对辐射能量、羽焰温度、燃气浓度测定中的应用.根据羽焰辐射亮度分布可判断燃烧产物种类,通过能量积分得到推进剂辐射能时间分辨图.总结了遥感FTIR光谱法在测定羽焰试验过程中的绝对辐射能量、燃烧产物温度和浓度方面的基本理论、试验方法、结果和应用.表明遥感FTIR光谱法是一种测定固体推进剂信号的可靠方法.附19篇文献.     

FTIR技术结合代谢物组学分析方法在菌株高通量筛选中的应用

为了寻找菌株高通量筛选的新方法，尝试运用代谢物组学的技术及其分析方法来筛选菌株。通过运用FTIR技术结合PCA、HCA，很好地区分了处于不同发酵时间的利迪链霉菌AS 4.2501，并找到了利迪链霉菌合成利迪链菌素时可能的生物标志物;并尝试使用FTIR技术结合ANN较好地预测了具有不同利迪链菌素合成能力的利迪链霉菌的突变株。实验结果表明基于代谢物组分析的FTIR技术和化学计量学数据处理方法的结合，有望用于菌株诱变后的高通量筛选。     

分析测试

941317纺织纤维的裂解FTIR分析Howell H.E.…;AATCC.Book of PaPers,1992,p·110(英)评论了用裂解方法结合傅里埃变换红外光谱对纺织纤维进行完性和定量的测定方法并将其和基于质谱或气相色谱的分子检测技术进行了对比在裂解FTIR分析过程中,其原始的裂解产物是通过一项选定波长范围的光谱检测程序来鉴定的.醋酸纤维、尼龙66和PET纤维的裂解FTIR光谱和醋酸、环戊酮及苯甲酸的汽相红外光谱相互匹配。由于FTIR光谱仪能在一秒钟内测定好几个光谱因此由于时间不同而产生的很多种裂解产物都可以准确地测出,文章以改性睛纶和50/50粘胶…     

红外光谱法研究反式1，4-聚异戊二烯结晶特性

采用傅里叶转换红外光谱(FTIR)法研究合成反式1,4-聚异戊二烯(TPI)的结晶特性.结果表明,TPI红外吸收频率和吸收峰形不受门尼粘度的影响,门尼粘度[ML(3+4) 100℃]为30的TPI结晶含量大于门尼粘度为65和84的试样;与浇注薄膜相比,热压薄膜FTIR曲线上843和980 cm-1两侧各出现了两个肩峰,而890 cm-1处结晶峰消失;热压薄膜试样在45℃冷却后,其FTIR曲线上出现863 cm-1处的弱α晶体吸收峰,而0℃冷却试样未出现;拉伸后的TPI试样FTIR曲线在863 cm-1处出现了结晶吸收峰.     

GC／FTIR技术及其进展

将气相色谱技术的优良分离能力和红外光镰 技术独特的结构鉴别能力相结合的联机检测技术－ＧＣ／ＦＴＩＲ,是一种很有使用价值的分离鉴定手段,本文讨论了气相色谱／傅 红外光谱联用系统的组成及其功能。阐述了发展听几种ＧＣ／ＦＴＩＲ新技术：体隔离技术;冷阳技术;预柱技术以及ＳＦＣ／ＦＴＩＲ技术。同时还论述ＧＣ／ＦＴＩＲ的定量方法。     

Soy lecithin phospholipid determination by fourier transform infrared spectroscopy and the acid digest/arseno-molybdate method: A comparative study

A study was conducted to determine the accuracy and precision of phospholipid analysis by a simple Fourier transform infrared spectroscopy (FTIR) method relative to the conventional phospholipid phosphorus analysis by the acid digest/arseno-molybdate method by Bartlett. Commercial soy lecithins of known concentrations of phospholipid were prepared and the phospholipid content measured by the FTIR and Bartlett methods. The coefficients of determination and of variances using the two methods were determined. The coefficient of determination for the FTIR method was >0.976 while that for the Bartlett method was ∼0.821. The coefficients of variances (CV) for 1–20% phospholipid concentration range using 10 replicate samples were found to lie between 3.59 and 9.45% for the FTIR method, while the Bartlett method had much higher CV for the same range and replicates (8.95 to 48.73%), signifying the higher accuracy and precision of the FTIR compared to the Bartlett method in the determination of the actual percentage of phospholipid. The Bartlett method gave no significant difference in the phospholipid levels at smaller concentrations, indicating its limitation in accurately determining percentage phospholipid of samples at low concentrations. The one-way analysis of variance at the 1–20% phospholipid concentration range showed that there were significant differences in the mean percentage phospholipid levels for the FTIR data, which was therefore able to distinguish samples with small differences in phospholipid levels. The FTIR method gave consistently reliable results within the range chosen (1–20% phospholipid content). FTIR is a fast, simple, and reliable analytical tool for quantitative phospholipid analysis.     

Fourier Transform Infrared and Ion-Chromatographic Sulfate Analysis of Ambient Air Samples

Fourier transform infrared (FTIR) spectrometry has been evaluated as a method for determining the sulfate concentration of ambient aerosol particulate samples. Samples were collected on Teflon filters. The filters were analyzed for sulfate by both FTIR and ion chromatography (IC). There is good agreement between sulfate analysis by IC and analysis of the FTIR transmission spectra of the air filters during the first 5 1/2 days of the Carbonaceous Species Methods Intercomparison Study in which the ambient sulfate concentrations were above the 5.8 μg/cm² lower limit of detection of the FTIR technique. A method to improve the FTIR lower limit of detection is discussed. The difficulties incurred during background subtraction of the infrared spectra are described.     

傅立叶变换红外光谱法在橡胶分析中的应用与进展

简介了用橡胶分析的傅立叶变换红外光谱透射法，漫反射ＦＴＩＲ法，衰全反射ＦＴＩＲ法，ＦＴＩＲ－光声光谱法，ＦＴＩＲ仪与各种仪器的联用，以及计算机技术在ＦＴＩＲ分析中的应用与进展。     

Biaxial orientation in HDPE films: comparison of infrared spectroscopy, X-ray pole figures and birefringence techniques

In this study, high-density polyethylene films (HDPE) were produced using different processes (film blowing and biaxial orientation) and processing conditions. The orientation of the films was characterized in terms of their biaxial crystalline, amorphous and global orientation factors using birefringence, Fourier transform infrared spectroscopy (FTIR) using a tilted incidence technique and X-ray pole figures. Evaluation of a simplified FTIR procedure without using the tilted method for the determination of crystalline orientation factors proposed in the literature is also evaluated and assessed. The results indicate that FTIR overestimate the crystalline orientation factors, particularly for the crystalline a-axis. Significant discrepancies are also observed for the b-axis orientation, which may be due to an overlap of the amorphous contribution and/or saturation of FTIR bands. Those differences are larger for films with low orientation, such as blown films. Amorphous phase orientation from FTIR depends on the band used and is not necessarily in agreement with that determined from combination of X-ray and birefringence.     

Infrared spectroscopic studies of the nonformaldehyde durable press finishing of cotton fabrics by use of polycarboxylic acids

A number of polycarboxylic acids have been used successfully as new nonformaldehyde cross-linking agents for cotton fabrics. In our previous research, Fourier transform infrared photoacoustic spectroscopy (FTIR/PAS) demonstrated the ability for characterizing ester cross-linkages in the finished cotton fabrics. In this research, the effects of different acid concentrations, different catalyst concentrations, different curing temperatures, and different curing times on the ester cross-linking of the cotton fabrics were determined by FTIR/PAS. The infrared spectroscopic data were also correlated to durable press (DP) ratings. FTIR appears to be useful for evaluating the effectiveness of polycarboxylic acids as cross-linking agents for cotton fabrics. FTIR definitely complements the existing methods for evaluating finished textile fabrics.     

Chemically sensitive parallel analysis of combinatorial catalyst libraries

This study demonstrates how Fourier transform infrared imaging (FTIR) can be employed as a powerful spectroscopic tool for the parallel investigation of multiple member heterogeneous catalyst systems. FTIR imaging combines the chemical specificity and high sensitivity of infrared spectroscopy with the ability to rapidly analyze multiple samples simultaneously. A new implementation, using a rapid-scan FTIR spectrometer instead of a step-scan FTIR spectrometer, allows much improved data collection times without sacrificing data quality. Using CO adsorption and CO oxidation as model systems, it was established that FTIR imaging is very well suited to high-throughput parallel analysis of adsorbates and reaction products from supported catalyst libraries.     

Evaluation of the Performance of a Portable Mid-Infrared Analyzer for the Rapid Determination of Total Trans Fat in Fast Food

The performance of a novel, transmission‐mode, portable, Fourier transform infrared (FTIR) analyzer was evaluated and compared to that of a benchtop attenuated total reflection (ATR)‐FTIR spectrometer. The total concentration of trans fatty acids in the fat extracted from 19 representative fast foods was rapidly (<5 min) quantified in a single measurement after conversion to fatty acid methyl esters (FAME). While the FTIR determination is rapid, the time required for extraction and derivatization is not. For all extracts, the total trans FAME concentration varied from approximately 0.5 to 11 % (of total FAME) as determined using the portable FTIR analyzer. The trans fat contents (mean ± SD), expressed in grams per serving and calculated on the basis of total fat content and FTIR determination of trans fat content, were found to be 1.00 ± 0.42 for hamburgers, 0.67 ± 0.78 for chicken tenders, 1.00 ± 1.24 for French fries, and 0.27 ± 0.23 for apple pies. Determinations of total trans‐unsaturated FAME were consistent with those obtained by use of ATR‐FTIR and GC official methods (AOCS Cd 14e‐09 and AOCS Ce 1j‐07, respectively). These results indicate that the portable FTIR analyzer is suitable for the rapid and routine quantification of total trans fat measured as FAME prepared from fats extracted from fast foods.     

傅立叶变换红外光谱仪在水中油定量分析中的应用

采用红外光谱法对污水中油含量进行测试,并对傅立叶变换红外光谱仪的应用机理和实际工作中遇到的问题进行了研究分析。通过实验确定了用PE-2000傅立叶变换红外光谱仪测定水中油的最佳实验条件。该方法分析准确度较高,回收率在97%～103%之间。