傅里叶变换衰减全反射红外光谱分析塑料的润滑剂

研究傅里叶变换衰减全反射红外光谱(ATR-FTIR)在塑料润滑剂分析中的应用。结果表明,通过ATR-FTIR法可以快速分析塑料的润滑剂。     

红外光谱技术的进展及其应用

对漫反射、衰减全反射傅里叶变换红外光谱和差谱等技术及其应用进行了简单介绍     

红外显微分析技术交流会

傅里叶变换红外光谱分析技术在各行各业中的应用（如微小异物、刑侦物证、高分子材料以及生命科学中的癌细胞的诊断等）是当今备受关注的重大课题。检测分析技术是建立人类安全保障体系的支撑和技术手段。为使广大会员对傅里叶变换红外光谱显微分析技术有进一步的了解，红外协作组与日本国岛津公司于2005年7月28日在新锦江大酒店举行《红外显微分析技术交流会》。一百余位专业人士出席了交流会。     

不同产地桔梗的红外光谱整体成分鉴别研究

采用傅里叶变换红外光谱法和显微红外光谱技术对不同产地桔梗进行鉴别.结果表明,不同产地桔梗的一阶红外光谱图整体上差别并不明显,二阶导数处理后,各产地的特征峰差异得以显现,显微红外光谱图则进一步直观清晰地显现出桔梗皂苷d的含量多少与分布区域,进一步佐证了不同产地桔梗间桔梗皂苷d的含量差异的结果.根据不同产地地理远近来分析,...     

红外光谱法在防晒化妆品鉴别研究中的应用

采用傅里叶变换衰减全反射红外光谱法(ATR-FTIR)对从不同渠道采集的6个同一品牌和系列的防晒化妆品进行分析,同时采用高效液相色谱仪对防晒化妆品样品中的防晒剂种类及其含量进行检测。结果表明,不同来源防晒化妆品样品的红外光谱图在防晒剂主要官能团结构上呈现较大差异,且与经高效液相色谱检测的防晒剂种类及含量结果具有较好的相关性。     

傅里叶变换衰减全反射红外光谱在顺丁橡胶分析中的应用

研究傅里叶变换衰减全反射红外光谱(ATR-FTIR)在顺丁橡胶(BR)分析中的应用,得到多个BR的ATR-FTIR特征谱。结果表明:通过ATR-FTIR谱可以快速区分BR的生胶与硫化胶,便于未知胶料的鉴定;可以判断硫化胶中是否含有白炭黑。用ATR-FTIR谱分析BR方便、快捷。     

东阿阿胶红外光谱研究

采用傅里叶变换衰减全反射红外光谱技术(ATR-FTIR),分别研究了东阿阿胶和伪品东阿阿胶的红外光谱。实验发现:东阿阿胶和伪品东阿阿胶同时存在着CH_3不对称伸缩振动模式(ν_(asCH3)),CH_2不对称伸缩振动模式(ν_(asCH2)),CH_2对称伸缩振动模式(ν_(sCH2)),酰胺Ⅰ带对应的红外吸收模式(νamide-Ⅰ),酰胺Ⅱ带对应的红外吸收模式(νamide-Ⅱ)和酰胺Ⅲ带对应的红外吸收模式(νamide-Ⅲ)。研究发现,采用红外光谱技术可以区分东阿阿胶和伪品东阿阿胶。本项研究拓展了红外光谱技术在中药鉴别领域的研究范围。     

傅里叶变换红外光谱技术在法庭科学中的应用现状

傅里叶变换红外光谱技术因其方法简单快捷、结果准确直观、样品损耗小、检测成本低廉而被认为是适合分析各类物证的技术之一。通过介绍傅里叶变换红外光谱技术的原理及运用傅里叶变换红外光谱技术进行死后间隔时间推断、避孕套有关成分分析、微生物鉴定、土壤分析和车辆物证分析等几个方面阐述了其在法庭科学领域中的研究和应用现状,希望能够为该技术在法庭科学中的应用提供参考,并为鉴定相关案件中的物证提供一种新的思路。     

单次反射ATR-FTIR红外光谱法在涂膜表面成分分析中的应用

运用傅里叶变换衰减全反射红外光谱法(ATR-FTIR)中的单次反射法对水性偏氯乙烯-丙烯酸酯共聚物薄膜进行辅助定性研究,考察了具有不同偏氯乙烯单体含量的共聚物薄膜的红外谱图变化。同时运用单次反射ATR-FTIR法对施工现场取回的红色脱落涂膜进行定性分析。     

显微红外成像和衰减全反射技术在不同种属黄精中的鉴别研究

探讨了显微成像和衰减全反射两种红外模式对不同种属黄精的鉴别.以6种不同种属的黄精样品为研究对象,一份样品经冰冻切片机进行取样,采用显微红外仪器进行扫描;另一份样品经烘干打粉,采用衰减全反射模式扫描.结果表明,以多糖含量高低作为鉴别依据,衰减全反射模式可以快速判别出是否含有多糖以及简单比较不同种属黄精间含量差异,而显微红...     

Low-pressure plasma polymer modification from the FTIR point of view

The main scope of this article was to demonstrate the potential of Fourier transform infrared (FTIR) spectroscopy as a diagnostic tool for low-pressure plasma polymer modification. Two model polymers, polyethylene and polystyrene, were treated in radio-frequency (rf) discharges in argon, hydrogen, oxygen, nitrogen, and tetrafluoromethane. In situ FTIR analysis was based on infrared reflection absorption spectroscopy (IRRAS) and attenuated total reflection (ATR). For both techniques, thin-film samples were prepared from polymer solution. The effects appearing in the infrared spectra are discussed. The results are compared with those from other diagnostic techniques. © 1997 John Wiley & Sons, Inc. J Appl Polym Sci 65:381–390, 1997     

PET微塑料对污泥和厨余垃圾共消化的影响

探索了中温条件下不同粒径聚对苯二甲酸乙二醇酯（PET）微塑料（30 μm和250 μm）在0、0.45、1.44、2.88 mg/g总固体（TS）的添加量下,对剩余污泥和厨余垃圾厌氧共消化过程中每日甲烷产量、累计甲烷产量、溶解性化学需氧量、氨氮、挥发性脂肪酸以及微生物群落结构的影响。结果表明,PET微塑料会抑制甲烷产量、增加氨抑制、酸抑制风险。在微塑料投加量为2.88 mg/g TS时,累计甲烷产量分别下降了54.49 %（30 μm） 和 49.58 %（250 μm）。微生物结果表明：添加微塑料后细菌的多样性增加,古菌的多样性降低。在共消化过程,微塑料抑制了产酸菌Prevotella、 Proteiniphilum的丰度,同时也抑制了产甲烷菌Methanosaeta的丰度,减弱乙酸产甲烷的途径。相关性分析表明,微塑料的粒径与Euryarchaetota呈显著正相关（r=0.945、p<0.01）。微塑料粒径越小,对产甲烷菌丰度抑制越明显,与其他细菌相比,产甲烷菌对微塑料更为敏感。     

Monitoring of chemical reactions during polymer synthesis by real‐time attenuated total reflection (ATR)–FTIR spectroscopy

The present study demonstrates in situ real‐time attenuated total reflection (ATR)–FTIR spectroscopy as a powerful tool for monitoring and analyzing different polymerization and polymer modification reactions. Thus, a metallocene catalyzed copolymerization of propene and 10‐undecene‐1‐ol, a polycondensation reaction towards polysulfone, and a modification reaction of OH end groups of hyperbranched poly(urea‐urethane) were investigated successfully. The interpretation of the development of FTIR spectra was carried out on the basis of typical vibration bands of chemical groups of the corresponding monomers and polymers in each case, e.g. of the C?C double bond of 10‐undecene‐1‐ol during the copolymerization, the new C? O? C group of polysulfone, and the new urethane end group of poly(urea‐urethane). Kinetics prediction is also under consideration. © 2006 Wiley Periodicals, Inc. J Appl Polym Sci 101: 1374–1380, 2006     

Production of aceclofenac-loaded sustained release micro/nanoparticles using pressure homogenization and spray drying

The aim of the present study was to characterize polymeric micro/nanoparticles of aceclofenac produced using a high-pressure homogenizer and a spray dryer. The micro/nanoparticles were characterized in terms of their encapsulation efficiency (E.E.), particle size, morphology, and in vitro drug release performance. Interaction between the drug and the polymer (Eudragit RS 100 and ethylcellulose) was evaluated using Fourier transform infrared (FTIR) spectroscopy and X-ray powder diffractometry. Analysis of the results showed that speed and operating pressure have significant negative effect on E.E. of the micro/nanoparticles. The nanoparticles (970–197?nm) had E.E. of 74.09?±?1.17 to 83.66?±?1.63% while microparticles displayed EE. of 72.15?±?2.5%. The micro/nanoparticles were observed to be discrete and spherical. The FTIR analysis confirmed compatibility of aceclofenac with Eudragit RS 100 as well as ethylcellulose. In vitro study showed sustained drug release of 65 and 90% over a period of 12?h, thus prolonging the drug activity to treat the musculoskeletal disorder.     

Photoinitiated grafting of glycidyl methacrylate and methacrylic acid on ground tire rubber

Ground tire rubber (GTR) films and GTR particles were surface‐functionalized by glycidyl methacrylate and methacrylic acid through photoinitiated grafting. The grafting yield of GTR films was determined by Fourier transform infrared spectroscopy with attenuated total reflection (FTIR‐ATR). For the calibration of the FTIR‐ATR data, X‐ray photoelectron spectroscopy was used. The presence of epoxy and carboxyl groups on the GTR surface was demonstrated by contact‐angle measurements. © 2003 Wiley Periodicals, Inc. J Appl Polym Sci 89: 1622–1630, 2003     

DEVELOPMENT OF FT-IR ATTENUATED TOTAL INTERNAL REFLECTION DICHROISM TECHNIQUES FOR STRUCTURAL CHARACTERIZATION OF POLYMER SURFACES

We describe our continuing effort to develop FT-IR attenuated total reflection (ATR) dichroism techniques for the characterization of polymer surface structure and molecular orientation. Following theoretical background, we review the two-dimensional and three-dimensional analyses work based on a specially designed internal reflection crystal and a specially built ATR-sample attachment. In the current development section, we describe briefly the intensity correction procedures used in variable angle studies and an attempt to design a hemispheric crystal attachment to eliminate problems encountered with face-cut reflection crystals.     

DEVELOPMENT OF FT-IR ATTENUATED TOTAL INTERNAL REFLECTION DICHROISM TECHNIQUES FOR STRUCTURAL CHARACTERIZATION OF POLYMER SURFACES

We describe our continuing effort to develop FT-IR attenuated total reflection (ATR) dichroism techniques for the characterization of polymer surface structure and molecular orientation. Following theoretical background, we review the two-dimensional and three-dimensional analyses work based on a specially designed internal reflection crystal and a specially built ATR-sample attachment. In the current development section, we describe briefly the intensity correction procedures used in variable angle studies and an attempt to design a hemispheric crystal attachment to eliminate problems encountered with face-cut reflection crystals.     

红外光谱鉴定混合树脂的结构

红外光谱是高分子聚合物鉴定最常用的方法之一。通过单点衰减全反射及透射方法对比分析,鉴定了3种混合树脂的结构。     

In Situ FTIR Study of the Formation of an Organosilane Layer at the Silica/Solution Interface

An FTIR experiment especially designed to study the growth of an organosilane layer at the interface between a solution and a flat silica surface is presented. High sensitivity is achieved by using the attenuated total reflection (ATR) technique in a liquid flow cell. The ATR crystal, either silicon or germanium, is covered with a very thin silica layer. Chemical reactions of a mono-and a di-hydrolyzable silane with the silica substrate have been investigated. The grafting of a submonolayer of the first reagent has been monitored by following the C-H and SiO-H vibrations. The density of grafted molecules has been estimated and information on the nature of the chemical bonding has been achieved. Evidence for the chain-polymerization of the dihydrolyzable silane at the substrate/solution interface has been inferred from the appearance of a Si-O-Si absorption band.