FTIR spectroscopy Articles
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FTIR Spectroscopy
Fourier Transform Infrared (FTIR) Spectroscopy bases its functionality on the principle that almost all molecules absorb infrared light. Only the monatomic (He, Ne, Ar, etc) and homopolar diatomic (H2, N2, O2, etc) molecules do not absorb infrared light. Molecules only absorb infrared light at those frequencies where the infrared light affects the dipolar moment of the molecule. In a molecule, ...
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FT-IR spectroscopy as a tool for identification of apoptosis-induced structural changes in A549 cells treated with PM 701
Fourier transform infrared (FTIR) spectroscopy has been found useful for detecting apoptotic changes induced in human lung cancer cells (A549) that treated with PM 701 (natural product) in tissue culture level. Characteristic bands alterations were identified in the apoptotic cells arising from cellular protein, lipid and DNA, there were specific changes that affected the secondary structure of ...
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FTIR spectroscopy as a novel approach towards providing effect‐based endpoints in duckweed toxicity testing
Traditional duckweed toxicity tests only measure plant growth inhibition as an endpoint, with limited effects‐based data. This study aimed to investigate whether Fourier‐transform infrared (FTIR) spectroscopy could enhance the duckweed (Lemna minor L.) toxicity test. Four chemicals (Cu, Cd, atrazine, and acetochlor) and four metals‐containing industrial wastewater samples were tested. After ...
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Dry and wet methods of silicon dioxide surface functionalisation with 3–aminopropyl trimethoxysilane: application to fullerene C
60anchoringIn this work, we have studied the formation of self–assembled monolayers (SAM) of 3–aminopropyltrimethoxysilane (APTMS), chemically bound to silicon dioxide surface, prepared using a deposition from both solution and a new solvent–free process, using contact angle measurements, ellipsometry, ATR–FTIR spectroscopy and AFM imaging. In the first part, we have analysed the grafting kinetics of APTMS ...
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Adsorption and recovery of nonylphenol ethoxylate on a crosslinked β-cyclodextrin-carboxymethylcellulose polymer
A study of adsorption/recovery of nonylphenol 9 mole ethoxylate (NP9EO) on a crosslinked β-cyclodextrin-carboxymethylcellulose (β-CD-CMC) polymer was carried out by ultraviolet-visible (UV-vis) and Fourier transform infrared (FTIR) spectroscopies. The adsorption was performed in mixtures containing 500 mg of the β-CD-CMC polymer and aqueous NP9EO solutions at concentrations 12–82 mg/L, whereas ...
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High-sensitivity, fast-response monitoring of PFC and abatement tool emissions by FTIR spectroscopy
Semiconductor fab plants are faced with real-time monitoring and reduction of their PFC emissions to meet SEMI Environmental, Health and Safety (EHS) requirements. In some cases emissions are continuous, while in other cases they are intermittent or random. Also, in-situ real-time process control is becoming a critical element of yield enhacement. Solution: FTIR Spectroscopy In-Situ ...
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Enhanced removal of Hg(II) from acidic aqueous solution using thiol-functionalized biomass
Spent grain, the low-cost and abundant biomass produced in the brewing industry, was functionalized with thiol groups to be used as an adsorbent for Hg(II) removal from acidic aqueous solution. The adsorbents were characterized by the energy-dispersive X-ray analysis (EDAX) and Fourier transform infrared (FTIR) spectroscopy. Optimum pH for Hg(II) adsorption onto the thiol-functionalized spent ...
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What Is FTIR Spectroscopy?
We recently launched our newest product, the IR5 FTIR Spectrometer, but what is FTIR spectroscopy? This blog post will highlight the basics of FTIR spectroscopy, discussing how it works and what the resulting FTIR spectrum can reveal about your sample. Infrared Spectroscopy Infrared (IR) spectroscopy is one of the most used spectroscopic techniques in analytical laboratories for both qualitative ...
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Enhanced removal of Hg(II) from acidic aqueous solution using thiol-functionalized biomass
Spent grain, the low-cost and abundant biomass produced in the brewing industry, was functionalized with thiol groups to be used as an adsorbent for Hg(II) removal from acidic aqueous solution. The adsorbents were characterized by the energy-dispersive X-ray analysis (EDAX) and Fourier transform infrared (FTIR) spectroscopy. Optimum pH for Hg(II) adsorption onto the thiol-functionalized spent ...
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On the Application of Open-Path Fourier Transform Infrared Spectroscopy to Measure Aerosols: Observations of Water Droplets
ABSTRACT This paper proposes the application of Open-Path Fourier Transform Infra-Red (OP-FTIR) spectroscopy to measure aerosols. A preliminary experiment conducted in a standard shower chamber generated a condensed water aerosol cloud. The OP-FTIR beam acquired spectra through the cloud of water droplets. We matched calculated extinction spectra to measured extinction in the spectral range ...
By Arcadis
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Detection of early PFA seals (perfluoroalk-oxyethylene) degradation exposed to process gases inside a reactor chamber
Problem Statement Replacement of PFA seals inside the reactor chamber is performed according scheduled maintenance and life expectancy of the seals. Early degradation of seals goes completely undetected until there is a complete failure of the seal, letting atmospheric contaminants inside the reactor and forcing an unscheduled reactor downtime. IRGAS Applicability The IRGAS Turnkey Gas ...
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Polymer brushes for improvement of dry adhesion in biomimetic dry adhesives
Geckos' feet are extensively micro–structured, enabling geckos to adhere strongly to most surfaces and perform various manoeuvres even while upside down. Inspired by the structure of geckos' feet, a large number of biomimetic dry adhesives have been reported. Polymers brushes can offer a molecular scale attachment to surfaces; here we studied the effect of polymer brushes on adhesion. Atom ...
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Fabrication of metal nanowires based on self assembly of tryptophan-capped gold nanoparticle onto DNA network template
In this study, synthesis of conductive metal nanowires by using aligned and immobilised DNA strand on solid substrate is reported. The nanoporous gold film was prepared by electrostatic self assembly of gold nanoparticles capped with tryptophan. Tryptophan would improve surface properties of gold nanoparticles for strongly attaching to DNA. Fourier transform infrared (FTIR) spectroscopy confirmed ...
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Effect of streptavidin functionalised Fe 3 O 4 on the sedimentation of starch
Sedimentation velocity of starch was determined at three different pH in the presence of streptavidin functionalised Fe 3 O 4 nanoparticle. In the first step, the streptavidin functionalised Fe 3 O 4 nanoparticle was synthesised and characterised by various analytical techniques like Fourier transform infrared (FTIR) spectroscopy, X-ray diffraction (XRD) method, vibrating sample ...
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Characterisation of a bioassay using the marine alga Dunaliella tertiolecta associated with spectroscopic (visible and infrared) detection
This paper describes an ecotoxicological test using the alga Dunaliella tertiolecta associated with visible (VIS) and infrared (FTIR) spectroscopic detection. The estimation of toxicity is performed by measuring the cell density at 432 nm instead of 665 nm the results are comparable with those obtained by conventional visual or automatic estimation of celle density. FTIR spectroscopy gives an ...
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Preparation of composite coagulant of PFM-PDMDAAC and its coagulation performance in treatment of landfill leachate
A novel inorganic–organic composite coagulant, poly-ferric-magnesium (PFM) polydimethyldiallylammonium chloride (PDMDAAC), was prepared using FeSO4, MgSO4 and PDMDAAC as raw materials and was introduced to treat landfill leachate. The coagulation performance of the new reagent was evaluated and compared with those of other coagulants. The new reagent was characterized in terms of the ...
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Monitoring the performance of moisture purifiers for process gases
Problem Statement Moisture purifiers are a big aid in keeping moisture levels under control inside a process chamber. They are provided by manufacturers with certain life expectancies, which vary depending on the moisture content of the gas being purified. As a result, it is difficult to determine which gases have a high moisture content and which moisture purifier is becoming saturated. IRGAS ...
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Quantitative analysis of automotive exhaust gas by Fourier Transform Infrared spectroscopy
For monitoring gaseous emissions from muffler, instruments presently used can only measure quantitatively a given pollutant. Fourier Transform Infrared (FTIR) spectroscopy can provide quantitative and online real time analysis. Calibration of our FTIR spectrometer with CO, CO2, NO, NO2 and N2O was done and the limits of quantification obtained were shown to be as low as 80 ppm. The variation ...
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Fourier transform infrared spectroscopic investigation of humic substance samples of different origin and typology supported by chemometric tools
In this paper 198 FTIR spectra of humic substance (HS) extracted from lake, marine sediments, soils and by Antarctic seawater were examined by Principal Component Analysis (PCA), Independent Component Analysis (ICA) and Two-dimensional Mapping (2DMAP) to identify the compositional and structural characteristics which characterise the typologies of samples examined and which are hardly detectable ...
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Nanohybrid anionic surfactant-akaganeite: preparation, structural analysis and cations sorption
The preparation of a nanocrystalline hybrid anionic surfactant-akaganeite (denoted as Akh) as an innovative sorbent, the investigation of its surface properties and the evaluation of its ability to remove cations from aqueous solutions were studied in the present paper. The nanocrystalline hybrid anionic surfactant-akaganeite was prepared in the laboratory using FeCl3 as precursor and an anionic ...
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