The FTIR Analysis of Field Aged Composite Insulators

2014 ◽  
Vol 1008-1009 ◽  
pp. 620-623
Author(s):  
Zi Wei Gao ◽  
Xue Cheng Zhu ◽  
Sheng Jie Yang ◽  
Hong Yan Nie
Keyword(s):  
Molecular Structure ◽  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Silicone Rubber ◽  
High Field ◽  
Ftir Spectra ◽  
Ftir Analysis ◽  
Power Network ◽  
Rubber Material ◽  
Aged Composite

With the increasing of the amount of composite insulators in power network, the transmission accidents caused by the fault of composite insulators are increased and the aging of composite insulators should be paying more attention. In the paper, fourier transform infrared spectroscopy (FTIR) is used to analysis the molecular structure of silicone rubber material of composite insulators. The results indicated that the higher the electric field of the insulator shed, the lower the peak of FTIR spectra. The heavier pollution the sample run, the lower the peak of FTIR spectra. So more attention should be pay to the samples which run in heavier pollution region or the high field part of the insulator.

scholarly journals Forensic Examination of Inks Extracted from Printed Documents using Fourier Transform Infrared Spectroscopy

2018 ◽  
pp. 10-17
Author(s):  
Paul Ocheje Ameh ◽  
Musa Suud Ozovehe
Keyword(s):  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Fourier Transform Infrared Spectroscopy ◽  
Alkyd Resin ◽  
Epoxy Resins ◽  
Ftir Spectra ◽  
Absorption Bands ◽  
Triarylmethane Dyes ◽  
Infra Red ◽  
Aliphatic Ester

Yellow, cyan, magenta and black inks were extracted from documents printed using two common brands of printing cartridge in Nigerian market and analyzed to identify / compare the functional groups present using Fourier Transform Infra-red Spectroscopy (FTIR). The FTIR spectra obtained were found to show highly characteristic absorption bands depending on the composition of the printer inks. Also, the results indicated the presence of triarylmethane dyes, epoxy resins, alkyd resin and esters in all the inks as they are peaks assigned to the vibration of aliphatic ester, asymmetrical and symmetrical stretching. The pure ink and its extract from the same band were also found to exhibit similar FTIR spectra while inks extract from different brands exhibits marked difference in absorption bands. This research can provide valuable information if an admitted sample is provided for comparing with the suspect printed document.

Difference in Molecular Structure of Rod and Cone Visual Pigments Studied by Fourier Transform Infrared Spectroscopy†

Biochemistry ◽  
2001 ◽  
Vol 40 (9) ◽  
pp. 2879-2886 ◽  
Author(s):  
Hiroo Imai ◽  
Takahiro Hirano ◽  
Hideki Kandori ◽  
Akihisa Terakita ◽  
Yoshinori Shichida
Keyword(s):  
Molecular Structure ◽  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Fourier Transform Infrared Spectroscopy ◽  
Fourier Transform Infrared ◽  
Visual Pigments

scholarly journals Application of Fourier Transform Infrared Spectroscopy (FTIR) for assessing biogenic silica sample purity in geochemical analyses and palaeoenvironmental research

2011 ◽  
Vol 7 (1) ◽  
pp. 65-74 ◽  
Author(s):  
G. E. A. Swann ◽  
S. V. Patwardhan
Keyword(s):  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Mass Balance ◽  
Fourier Transform Infrared Spectroscopy ◽  
Biogenic Silica ◽  
Fourier Transform Infrared ◽  
Ftir Spectra ◽  
Balance Model ◽  
Diatom Frustule ◽  
End Members

Abstract. The development of a rapid and non-destructive method to assess purity levels in samples of biogenic silica prior to geochemical/isotope analysis remains a key objective in improving both the quality and use of such data in environmental and palaeoclimatic research. Here a Fourier Transform Infrared Spectroscopy (FTIR) mass-balance method is demonstrated for calculating levels of contamination in cleaned sediment core diatom samples from Lake Baikal, Russia. Following the selection of end-members representative of diatoms and contaminants in the analysed samples, a mass-balance model is generated to simulate the expected FTIR spectra for a given level of contamination. By fitting the sample FTIR spectra to the modelled FTIR spectra and calculating the residual spectra, the optimum best-fit model and level of contamination is obtained. When compared to X-ray Fluorescence (XRF) the FTIR method portrays the main changes in sample contamination through the core sequence, permitting its use in instances where other, destructive, techniques are not appropriate. The ability to analyse samples of <1 mg enables, for the first time, routine analyses of small sized samples. Discrepancies between FTIR and XRF measurements can be attributed to FTIR end-members not fully representing all contaminants and problems in using XRF to detect organic matter external to the diatom frustule. By analysing samples with both FTIR and XRF, these limitations can be eliminated to accurately identify contaminated samples. Future, routine use of these techniques in palaeoenvironmental research will therefore significantly reduce the number of erroneous measurements and so improve the accuracy of biogenic silica/diatom based climate reconstructions.

scholarly journals FORMATION OF FIBRES AND SPHERES FROM CHITIN SOLUTION

2018 ◽  
Vol XXIII ◽  
pp. 25-32
Author(s):  
Dorota Biniaś ◽  
Włodzimierz Biniaś ◽  
Jarosław Janicki
Keyword(s):  
Molecular Structure ◽  
Electron Microscopy ◽  
Scanning Electron Microscopy ◽  
Fourier Transform ◽  
Infrared Spectroscopy ◽  
Surface Morphology ◽  
Phosphoric Acid ◽  
Chemical Modification ◽  
Functional Materials ◽  
Scanning Electron

The applications of chitin are limited due to its insolubility in most organic solvents. The chemical modification of chitin to generate new bio-functional materials can bring more desirable properties. A concentration of 5% can be obtained. We have successfully prepared chitin fibres and spheres by dissolving chitin in 85% phosphoric acid in various coagulating agents and then regenerating it in 10% sodium hydroxide. The change in molecular structure was studied by Fourier Transform Infrared Spectroscopy (FTIR). The surface morphology of different biomaterials was observed using scanning electron microscopy (SEM) and optical microscopy (OM).

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