Characterisation Of Polysacharides And Lipids From Selected Green Algae Species By FTIR-ATR Spectroscopy

Abstract Fourier transform infrared (FTIR) spectroscopy was used in this study to identify and determine spectral features of Chromochloris zofingiensis (Dönz) Fucíková et L.A. Lewis (SAG 211-14, Gottingen, Germany), Acutodesmus obliguus (Turpin) Hegewald (SAG 276-1, Gottingen, Germany) and Chlorella sorokiniana (K. Brandt) Pröschold et Darienko (SAG 211-40c, Gottingen, Germany). Polysaccharides and lipids from these three algae species were determined using Fourier Transformed Infrared Spectroscopy (FTIR) with ATR accessory with diamante crystal in spectral range from 400 – 4000 cm−1 and resolution 4.

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Application of FTIR-ATR Spectroscopy for Determination of Glucose in Hydrolysates of Selected Starches

Research Papers Faculty of Materials Science and Technology Slovak University of Technology ◽

10.2478/rput-2013-0019 ◽

2013 ◽

Vol 21 (Special-Issue) ◽

pp. 116-121 ◽

Cited By ~ 2

Author(s):

Alica Bartošová ◽

Maroš Soldán ◽

Maroš Sirotiak ◽

Lenka Blinová ◽

Anna Michaliková

Keyword(s):

Fourier Transform ◽

Infrared Spectroscopy ◽

Enzymatic Hydrolysis ◽

Fourier Transform Infrared Spectroscopy ◽

Analytical Method ◽

Fourier Transformed Infrared Spectroscopy ◽

Atr Spectroscopy ◽

Total Glucose ◽

Starch Hydrolysate

Abstract Fourier transform infrared spectroscopy was evaluated as an easy and simple analytical method for determination of starch residues after enzymatic hydrolysis. Different starch sources were liquefaction by α-amylase enzyme Termamyl SC for 25 minutes in autoclave. In the next step were starches solutions enzymatically hydrolysed by enzyme pollulanase Promozyme® for 24 hours to 60°C water bath. Total glucose in starch hydrolysate was determined using Fourier Transformed Infrared Spectroscopy (FTIR) with ATR accessory with diamante crystal by recording the absorption of different carbohydrate in spectral range from 700 - 4000 cm-1. Based on calibration curves of glucose the release of total glucose in hydrolysates was calculated.

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The Influence of UV Radiation on the Degradation of Pharmaceutical Formulations Containing Quercetin

Molecules ◽

10.3390/molecules25225454 ◽

2020 ◽

Vol 25 (22) ◽

pp. 5454

Author(s):

Iwona Golonka ◽

Stanisław Wilk ◽

Witold Musiał

Keyword(s):

Quality Assurance ◽

Fourier Transform ◽

Infrared Spectroscopy ◽

Decay Rate ◽

Ftir Spectroscopy ◽

Polyacrylic Acid ◽

Decomposition Rate ◽

Pharmaceutical Formulations ◽

Polymeric Gels ◽

The Stability

The aim of this study was to assess the photostability of quercetin in the presence of anionic and nonionic polymeric gels with varied compositions of an added component—glycerol. The samples were irradiated continuously at constant temperature. The stability of quercetin in solution and incorporated into the gels was evaluated by an UV-Vis spectrophotometer. FTIR spectroscopy (Fourier-transform infrared spectroscopy) was used to detect the changes in the structure of quercetin depending on the polymer used in the gel, and on the exposure time. Photostabilization is an important aspect of quality assurance in photosensitive compounds. The decomposition rate of quercetin in the ionic preparation of polyacrylic acid (PAA) with glycerol was 1.952·10−3 min−1, whereas the absence of glycerol resulted in a decay rate of 5.032·10−4 min−1. The formulation containing non-ionic methylcellulose resulted in a decomposition rate of quercetin in the range of 1.679·10−3 min−1. The decay rate of quercetin under light influence depended on the composition of the gel. It was found that the cross-linked PAA stabilized quercetin and the addition of glycerol accelerated the photodegradation.

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Integrated Band Intensities of Ethylene (C212H4) by Fourier Transform Infrared Spectroscopy

International Journal of Spectroscopy ◽

10.1155/2012/474639 ◽

2012 ◽

Vol 2012 ◽

pp. 1-5 ◽

Cited By ~ 9

Author(s):

G. B. Lebron ◽

T. L. Tan

Keyword(s):

Fourier Transform ◽

Infrared Spectroscopy ◽

Ambient Temperature ◽

Ftir Spectroscopy ◽

Fourier Transform Infrared ◽

Vapor Pressures ◽

Infrared Band ◽

Combination Bands ◽

First Time ◽

Absorbance Spectra

The integrated band intensities of ethylene (12C2H4) in the 640–3260 cm−1 region were determined by Fourier transform infrared (FTIR) spectroscopy. The infrared absorbance spectra of the ν7 and ν10, ν12, ν7+ν8, ν6+ν10, v11, and ν9 and ν2+ν12 bands of ethylene recorded at a resolution of 0.5 cm−1 were measured at an ambient temperature of 296 K at various vapor pressures ranging from 3×10−5 to 1×10−3 atm to obtain respective Beer-Lambert's law plots. The measured integrated band intensities in cm−1/cm atm were S(ν9andν2+ν12)=112.20±0.24, S(ν11)=55.35±0.14, S(ν12)=41.22±0.30, and S(ν7andν10)=328.66±16.55. In addition, the measured infrared band intensities of the ν7+ν8 and ν6+ν10 combination bands of ethylene are reported for the first time: S(ν7+ν8)=21.701±0.028 cm−1/cm atm and S(ν6+ν10)=2.568±0.025 cm−1/cm atm.

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Detection of Lard in Ink Extracted from Printed Food Packaging Using Fourier Transform Infrared Spectroscopy and Multivariate Analysis

Journal of Spectroscopy ◽

10.1155/2015/502340 ◽

2015 ◽

Vol 2015 ◽

pp. 1-6 ◽

Cited By ~ 3

Author(s):

Syazwani Ramli ◽

Rosnita A. Talib ◽

Russly A. Rahman ◽

Norhazlin Zainuddin ◽

Siti Hajar Othman ◽

...

Keyword(s):

Principal Component Analysis ◽

Multivariate Analysis ◽

Fourier Transform ◽

Infrared Spectroscopy ◽

Ftir Spectroscopy ◽

Food Packaging ◽

Principal Component ◽

Fourier Transform Infrared ◽

Calibration Standards ◽

Number Of Factors

Fourier transform infrared (FTIR) spectroscopy combined with chemometrics was utilised to discriminate the presence of lard in extracted ink of printed food packaging. Two spectral regions (full spectra, 3999–649 cm−1, and combination of two regions, 3110–2630 cm−1and 1940–649 cm−1) of lard, commercial gravure ink, and the blends of both were selected and used to develop a Soft Independent Modelling of Class Analogy (SIMCA) model. The score plots obtained from the Principal Component Analysis (PCA) revealed that the maximum number of factors (7 factors) was needed to explain 84% of the total variance. SIMCA was employed as the method to classify the samples into their specific groups.SiversusHiplots showed that the calibration standards can be classified as lard-containing standards. Sample 2 was deduced to have the highest possibility of containing lard, while only samples 5 and 7 cannot be classified as lard-containing samples. These results demonstrated that FTIR spectroscopy, when combined with multivariate analysis, can provide a rapid method with no excessive sample preparation to detect the presence of lard in ink of foodstuff packaging.

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Fourier Transform Infrared Spectroscopy as A Technique for Multivariate Analysis of Lard Adulteration in Food Products: A Review

Journal of Fatwa Management and Research ◽

10.33102/jfatwa.vol17no1.1 ◽

2019 ◽

Vol 17 (july 2019) ◽

pp. 1-13

Author(s):

Farah Wahida Harun

Keyword(s):

Multivariate Analysis ◽

Fourier Transform ◽

Infrared Spectroscopy ◽

Chemical Analysis ◽

Ftir Spectroscopy ◽

Fourier Transform Infrared Spectroscopy ◽

Food Products ◽

Complex Composition ◽

Quality Of Food

The presence of lard in food products is prohibited (haram) for Muslim and a few other religions i.e. Judaism and Hinduism. Due to the advantages of lard such as easily available, cheap and able to produce better quality of food products, the adulteration of food products with lard has become a serious issue. The complex composition of food products and similar properties of lard as an adulterant make identification of food adulterations a big challenge. Chemical analysis is one way to authenticate the halal status of the food products which is based on the specific markers present or absent in the products they contain. This article highlights on the use ofFourier transform infrared (FTIR) spectroscopy to determine the presence of lard combined with multivariate analysis. This technique also able to quantify the amount of lard in the food products that are claimed to be halal.

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Analytical methods to differentiate Romanian amber and Baltic amber for archaeological applications

Open Chemistry ◽

10.2478/s11532-009-0053-8 ◽

2009 ◽

Vol 7 (3) ◽

pp. 560-568 ◽

Cited By ~ 10

Author(s):

Eugenia Teodor ◽

Simona Liţescu ◽

Antonela Neacşu ◽

Georgiana Truică ◽

Camelia Albu

Keyword(s):

Mass Spectrometry ◽

Fourier Transform ◽

Infrared Spectroscopy ◽

Analytical Methods ◽

Baltic Amber ◽

Archaeological Sites ◽

Mass Spectrometry Detection ◽

Archaeological Material ◽

Fourier Transformed Infrared Spectroscopy ◽

Wide Range

AbstractThe study aims to establish several definite criteria which will differentiate Romanian amber and Baltic amber to certify the local or Baltic origin of the materials found in archaeological sites on the Romanian territory, by using light microscopy and performing analytical methods, such as Fourier transform infrared spectroscopy-variable angle reflectance and liquid chromatography with mass spectrometry detection. Experiments especially by Fourier transformed infrared spectroscopy, were applied to a wide range of samples with controlled origin. The methods were optimised and resulted in premises to apply the techniques to analysis of the archaeological material.

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A Survey of Spectral Features in ISO SWS Spectra of AGNs

International Astronomical Union Colloquium ◽

10.1017/s0252921100040380 ◽

1997 ◽

Vol 159 ◽

pp. 337-338

Author(s):

E. Sturm ◽

D. Lutz ◽

R. Genzel

Keyword(s):

Infrared Spectroscopy ◽

Spectral Range ◽

Galactic Nuclei ◽

Spectral Features ◽

Infrared Galaxies ◽

Mid Infrared ◽

Mid Infrared Spectroscopy ◽

Central Program ◽

Ultraluminous Infrared Galaxy ◽

Ultraluminous Infrared Galaxies

Various AGNs, starburst galaxies, and ultraluminous infrared galaxies (ULIRGs) are observed as part of the ISO-SWS central program of mid-infrared spectroscopy on bright galactic nuclei. Prototypical template sources are scanned over the full spectral range of SWS (2.5–45µm) in order to get a complete census of spectral features in this wavelength domain. As an example we present the spectrum of the Seyfert 2 galaxy Circinus. The application of results from this survey to the study of the nature and evolution of other galaxies can be demonstrated by an analysis of the ultraluminous infrared galaxy Arp 220.

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The Optogalvanic Spectrum of Neutral Lanthanum between 5610 and 6110 Å

Atoms ◽

10.3390/atoms8020023 ◽

2020 ◽

Vol 8 (2) ◽

pp. 23 ◽

Cited By ~ 2

Author(s):

Laurentius Windholz ◽

Tobias Binder

Keyword(s):

Fourier Transform ◽

Spectral Range ◽

Energy Levels ◽

Gas Mixture ◽

Doppler Width ◽

Spectral Features ◽

Ar Gas ◽

Fourier Transform Spectrum

We report on a complete optogalvanic spectrum of a discharge burning in a La-Ar gas mixture, in the spectral range 5610–6110 Å (17,851 to 16,364 cm−1). About 1900 overlapping laser scans, each between 1 and 1.5 cm−1 wide, were necessary to cover this range. The resolution of the spectra is limited by the Doppler width of the spectral features to about 0.03 cm−1 (or ca. 0.01 Å) and is comparable with a Fourier-transform spectrum, but the sensitivity is much higher. Indeed, we could find more than 1800 lines, from which about 800 could be classified as transitions between known energy levels. The main focus of the investigations was to discover previously unknown energy levels by means of excitation of unclassified spectral features.

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Forensic Discrimination Potential of Blue, Black, Green, and Red Colored Fountain Pen Inks Commercially Used in Pakistan, by UV/Visible Spectroscopy, Thin Layer Chromatography, and Fourier Transform Infrared Spectroscopy

International Journal of Analytical Chemistry ◽

10.1155/2019/5980967 ◽

2019 ◽

Vol 2019 ◽

pp. 1-10 ◽

Cited By ~ 4

Author(s):

Mehwish Sharif ◽

Madeeha Batool ◽

Sohail Chand ◽

Zahoor Hussain Farooqi ◽

Syed Azhar Ali Shah Tirmazi ◽

...

Keyword(s):

Developing Countries ◽

Fourier Transform ◽

Infrared Spectroscopy ◽

Thin Layer ◽

Ftir Spectroscopy ◽

Visible Spectroscopy ◽

Discriminating Power ◽

Vis Spectroscopy ◽

Uv Visible ◽

Layer Chromatography

Examination and comparison of fountain pen inks are very important in forensic questioned documents examination in developing countries where the chances of fraud are greater in cases of cheques, marriage papers, entry of birth and death, etc. In this study, fountain pen inks of blue, black, green, and red colours that are commercially used in Pakistan have been discriminated by UV-Vis spectroscopy, TLC, and FTIR spectroscopy. We have calculated and compared the results in terms of discriminating power. UV/Visible Spectroscopy of fountain pen inks of different brands showed different composition despite their similar colours. TLC was effectively used to differentiate between the colored components of inks. FTIR results showed that each brand could be distinguished by studying the pattern of their absorption spectra that appeared due to the presence of different functional groups. On the basis of combined results of UV-VIS, TLC, and FTIR, the DP was found from 0.73-0.8 for blue, 0.80-1.0 for black, 0.5-1.0 for green, and 1.0 for red colored fountain pen inks. Overall, this study demonstrated the elevated worth of analysis of fountain pen inks commercially used in Pakistan as the study for fountain pen inks, while not very common, remains an interesting target study.

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