Chemical testing Fourier transform infrared

Modern Fourier Transform Infrared Spectroscopy Chemical Test Methods of Analysis... 

Analysts. It has been our objective to determine criteria for resin, curative or formulation which would permit prediction of sucess prior to potting tests. Many tests, both chemical and physical in nature, have been executed on commercial resin systems. These have included high pressure liquid chromatography (HPLC), Fourier Transform infrared spectrometry (FTIR), gel permeation chromatography, compressive tensile tests by Instron on resin plaques in air and under various aqueous solutions and heat distortion temperature. 

M.T. Soderstrom, H. Bjork, V.M.A. Hakkinen, O. Kostiainen, M.-L. Kuitunen and M. Rautio, Identification of compounds relevant to the chemical weapons convention using selective gas chromatography detectors, gas chromatography/Mass spectrometry and gas chromatography/Fourier transform infrared spectroscopy in an international proficiency test, J. Chromatogr., A742, 191-203 (1996). 

Elemental Spedation - New Approaches for Trace Element Analysis Discrete Sample Introduction Tbchniques for Inductively Coupled Plasma Mass Spectrometry Modem Fourier Transform Infrared Spectroscopy Chemical Test Methods of Anal3rsis... 

U.S. Environmental Protection Agency (EPA), Method 8410, Gas chromatography/fourier transform infrared (GC/FT-IR) spectrometry for semivolatile organics capillary column. Revision 0, In Online Test Methods for Evaluating Solid Waste, Physical/Chemical Methods (SW-846), Office of Solid Waste, 1994, http //www.epa.gov/epaoswer/hazwaste/test/pdfs/8410. 

Most of the techniques employed in fibre analysis are nondestructive tests to determine whether the fibre is natural (obtained from animal, plant, or mineral) or synthetic (wholly manufactured from chemicals or regenerated from natural fibres) and the fibre type (e.g., determining if the fibre is wool, cotton, nylon, polyester, etc.). Whether any chemical treatments have been carried out (such as bleaching or the use of delustrants) is noted and the colour is also determined. Many of the techniques commonly used in these analyses include low- and high-power microscopes, Fourier transform infrared (FTIR) microscopy, polarising Ught microscopy, fluorescence microscopy, and microspectrophotometry (MSP). 

Chemical characterization of the UHMWPE powder is typically performed at the powder-manufacturing site as part of their quality control protocol. However, researchers may want to periodically verify the purity and composition of the powder. ASTM 648 outlines several tests that can be used to analyze the powder. With regards to chemical characterization, trace element analysis and Fourier transform infrared spectroscopy (FTIR) are the two common approaches. 

Qian et al. conducted a study on bamboo particles (BP) that were treated with low-concentrations of alkali solution for various times and used as reinforcements in PLA based composites [35]. Characteristics of BP by composition analysis, scaiming electron microscopy, Brunauer-Emmett Teller test, and Fourier transform infrared spectroscopy, showed that low-concentration alkali treatment had a significant influence on the microstructure, specific surface area, and chemical groups of BP. PLA/treated-BP and PLA/untreated-BP composites were both produced with 30 wt% BP content. Mechanical measurements showed that tensile strength, tensile modulus, and elongation at break of PLA/BP composites increased when the alkali treatment time reached... 

Differential scanning calorimetry and Fourier transform infrared spectroscopy techniques were used to study the structure of water molecules in polyvinyl alcohol and polyethylene grafted acrylate hydrophilic polymers. Varying amounts of water were added to test samples and the samples conditioned to the sorption equilibrium state in sealed containers for 24 hours prior to evaluation. It was concluded that below a threshold water content, depending on the polymers physical and chemical stmcture, water molecules absorbed in hydrophilic polymer cannot form ice crystals in the polymer matrix. Above this threshold content, the water crystallises but below zero. It was also demonstrated that the absorbed water in hydrophilic polymers develops differing hydrogen bonds in the first and second hydration layers. It was concluded that the potential influence of these intermolecular interactions should therefore be taken into account whenever a polymer is used with a solvent. 25 refs. 

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