Dispersive and FT-Raman spectroscopic methods in food analysis

RSC Advances ◽  
2015 ◽  
Vol 5 (70) ◽  
pp. 56606-56624 ◽  
Author(s):  
Ismail Hakki Boyaci ◽  
Havva Tümay Temiz ◽  
Hüseyin Efe Geniş ◽  
Esra Acar Soykut ◽  
Nazife Nur Yazgan ◽  
...  
Keyword(s):  
Raman Spectroscopy ◽  
Molecular Analysis ◽  
Food Analysis ◽  
Food Samples ◽  
Spectroscopic Methods ◽  
Raman Spectroscopic ◽  
Powerful Technique ◽  
Ft Raman

Raman spectroscopy is a powerful technique for molecular analysis of food samples.

scholarly journals Application of Raman Spectroscopic Methods in Food Safety: A Review

Biosensors ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 187
Author(s):  
Marlen Petersen ◽  
Zhilong Yu ◽  
Xiaonan Lu
Keyword(s):  
Raman Spectroscopy ◽  
Food Safety ◽  
Surface Enhanced Raman Spectroscopy ◽  
Food Samples ◽  
Vital Role ◽  
Detection Methods ◽  
Spectroscopic Methods ◽  
Food Contaminants ◽  
Raman Spectroscopic ◽  
Food Detection

Food detection technologies play a vital role in ensuring food safety in the supply chains. Conventional food detection methods for biological, chemical, and physical contaminants are labor-intensive, expensive, time-consuming, and often alter the food samples. These limitations drive the need of the food industry for developing more practical food detection tools that can detect contaminants of all three classes. Raman spectroscopy can offer widespread food safety assessment in a non-destructive, ease-to-operate, sensitive, and rapid manner. Recent advances of Raman spectroscopic methods further improve the detection capabilities of food contaminants, which largely boosts its applications in food safety. In this review, we introduce the basic principles of Raman spectroscopy, surface-enhanced Raman spectroscopy (SERS), and micro-Raman spectroscopy and imaging; summarize the recent progress to detect biological, chemical, and physical hazards in foods; and discuss the limitations and future perspectives of Raman spectroscopic methods for food safety surveillance. This review is aimed to emphasize potential opportunities for applying Raman spectroscopic methods as a promising technique for food safety detection.

Potential of Near-Infrared Fourier Transform Raman Spectroscopy in Food Analysis

1992 ◽  
Vol 46 (10) ◽  
pp. 1503-1507 ◽  
Author(s):  
Y. Ozaki ◽  
R. Cho ◽  
K. Ikegaya ◽  
S. Muraishi ◽  
K. Kawauchi
Keyword(s):  
Raman Spectroscopy ◽  
Fourier Transform ◽  
Fatty Acid ◽  
Raman Spectra ◽  
Food Analysis ◽  
Near Infrared ◽  
Egg White ◽  
Ft Raman Spectroscopy ◽  
Ft Raman

The 1064-nm excited Fourier transform (FT) Raman spectra have been measured in situ for various foods in order to investigate the potential of near-infrared (NIR) FT-Raman spectroscopy in food analysis. It is demonstrated here that NIR FT-Raman spectroscopy is a very powerful technique for (1) detecting selectively the trace components in foodstuffs, (2) estimating the degree of unsaturation of fatty acids included in foods, (3) investigating the structure of food components, and (4) monitoring changes in the quality of foods. Carotenoids included in foods give two intense bands near 1530 and 1160 cm−1 via the pre-resonance Raman effect in the NIR FT-Raman spectra, and therefore, the NIR FT-Raman technique can be employed to detect them nondestructively. Foods consisting largely of lipids such as oils, tallow, and butter show bands near 1658 and 1443 cm−1 due to C=C stretching modes of cis unsaturated fatty acid parts and CH2 scissoring modes of saturated fatty acid parts, respectively. It has been found that there is a linear correlation for various kinds of lipid-containing foods between the iodine value (number) and the intensity ratio of two bands at 1658 and 1443 cm−1 ( I1658/ I1443), indicating that the ratio can be used as a practical indicator for estimating the unsaturation level of a wide range of lipid-containing foods. A comparison of the Raman spectra of raw and boiled egg white shows that the amide I band shifts from 1666 to 1677 cm−1 and the intensity of the amide III band at 1275 cm−1 decreases upon boiling. These observations indicate that most α-helix structure changes into unordered structure in the proteins constituting egg white upon boiling. The NIR FT-Raman spectrum of old-leaf (about one year old) Japanese tea has been compared with that of its new leaf. The intensity ratio of two bands at 1529 and 1446 cm−1 ( I1529/ I1446), assignable to carotenoid and proteins, respectively, is considerably smaller in the former than in the latter, indicating that the ratio is useful for monitoring the changes in the quality of Japanese tea.

FT-Raman Spectroscopic Study of Decorated Stained Glass

1998 ◽  
Vol 52 (5) ◽  
pp. 679-682 ◽  
Author(s):  
H. G. M. Edwards ◽  
J. K. F. Tait
Keyword(s):  
Raman Spectroscopy ◽  
Fourier Transform ◽  
19Th Century ◽  
Potential Application ◽  
Stained Glass ◽  
Raman Spectroscopic ◽  
Raman Spectroscopic Study ◽  
Two Samples ◽  
Ft Raman Spectroscopy ◽  
Ft Raman

Two samples of decorated stained glass (14th century and 19th century) from Southwell Minster, Nottinghamshire, U.K. have been examined with the use of Fourier transform (FT)-Raman spectroscopy. The pigment used in both cases has been identified as red ochre, and the potential application of FT-Raman spectroscopy to an important area of conservation and restoration of glass artifacts is demonstrated.

scholarly journals Identification and Detection of Finasteride Polymorphs in Finasteride Tablets by FT-Raman Spectroscopy

2020 ◽  
Vol 32 (8) ◽  
pp. 1865-1868
Author(s):  
M. Chandra Sekhara Rao ◽  
R. Chenna Krishna Reddy ◽  
K.B. Chandra Sekhar ◽  
Y.V. Rami Reddy
Keyword(s):  
Raman Spectroscopy ◽  
Dosage Form ◽  
Spectroscopic Method ◽  
Weight Fraction ◽  
Polymorphic Form ◽  
Raman Spectroscopic ◽  
Solid Dosage ◽  
Ft Raman Spectroscopy ◽  
Tablet Preparation ◽  
Ft Raman

A simple FT-Raman spectroscopic method was developed for identification of finasteride polymorph form in finished dosage form. Finasteride polymorph form I was used in the tablet preparation and the weight fraction of finasteride in tablet was only about 0.023. The method was successfully used to identify the polymorphic form of finasteride in tablet and also to detect up to a level of about 15% of the other polymorph of finasteride present in the solid dosage. The dosage form was characterized by different techniques i.e. powdered X-ray diffraction, infrared spectroscopy and Raman spectroscopy. Based on literature survey, only Raman spectroscopy method is able to identify the polymorph of finasteride in dosage form.

Raman Spectroscopic Studies of Amsacrine

1992 ◽  
Vol 46 (10) ◽  
pp. 1540-1544 ◽  
Author(s):  
Catherine A. Butler ◽  
Ralph P. Cooney ◽  
William A. Denny
Keyword(s):  
Crystal Structure ◽  
Raman Spectroscopy ◽  
Crystal Structure Data ◽  
Visible Spectrum ◽  
Spectroscopic Studies ◽  
Resonance Raman Spectrum ◽  
Raman Spectroscopic ◽  
Ft Raman Spectroscopy ◽  
Uv Visible ◽  
Ft Raman

Amsacrine (4′-(9-acridinylamino)methanesulfon- m-anisidide) in both solid and aqueous forms was characterized with the use of resonance and nonresonance Raman spectroscopy (including FT-Raman spectroscopy). Evidence that the acridine nucleus is the dominant chromophoric unit contributing to the resonance Raman spectrum is based upon the apparent similarities of the spectra of aqueous amsacrine (in the unpro-tonated form) and acridine (in ethanol). The probable non-coplanarity of the acridine and phenyl units in the amsacrine molecule (based on previously reported crystal structure data) is consistent with the suggestion that the acridine nucleus may constitute an independent chromophoric unit. Further evidence is derived from analysis of the UV-visible spectrum, which indicates that excitation at 457.9 nm falls within an electronic transition of the acridine nucleus of amsacrine. The excitation profiles of aqueous amsacrine are presented, and four types of profiles have been identified.

scholarly journals Simple and efficient method for detection of traces of rare earth elements in minerals by raman spectroscopy instrumentation

2011 ◽  
Vol 30 (2) ◽  
pp. 241 ◽  
Author(s):  
Petre Makreski ◽  
Gligor Jovanovski* ◽  
Tomče Runčevski ◽  
Radojko Jaćimović
Keyword(s):  
Raman Spectroscopy ◽  
Rare Earth ◽  
Rare Earth Elements ◽  
Spectroscopic Method ◽  
Analytical Techniques ◽  
Abundance Distribution ◽  
Raman Spectroscopic ◽  
Spectroscopy Instrumentation ◽  
Modern Analytical ◽  
Ft Raman

As an effort to increase the knowledge about the abundance, distribution and geochemical behaviorof the rare earth elements (REEs), a simple and effective Raman spectroscopic method for detection of REEsin minerals is proposed. The proposed method based on Raman spectroscopy provides a lower detectionlimit for REEs compared to the modern analytical techniques. It could be practiced even in laboratoriesequipped only with FT-Raman instrumentation. This simple, inexpensive, rapid and straightforward Ramanmethod for REEs detection in minerals is a convenient experiment for undergraduate and postgraduatelaboratory courses.

FT Raman Spectroscopy as a Tool for Characterization of Derivatized Silica Gel Sorbents

2005 ◽  
Vol 70 (2) ◽  
pp. 168-177
Author(s):  
Zuzana Tománková ◽  
Pavel Matějka ◽  
Karel Volka ◽  
Vladimír Král
Keyword(s):  
Raman Spectroscopy ◽  
Silica Gel ◽  
Stationary Phases ◽  
Amide Bonds ◽  
Raman Spectroscopic ◽  
Ft Raman Spectroscopy ◽  
Trimethylsilyl Groups ◽  
Ft Raman

The potential of Fourier-transform (FT) Raman spectroscopy for verification of individual steps of synthesis of new chromatographic stationary phases was studied. 3-Aminopropylated silica gel was modified with two different optically active compounds ((+)-cloprostenol, (+)-(R)-2,2'-dihydroxy-1,1'-binaphthalene-3-carboxylic acid) via amide bonds. In the next step, free silanol groups were protected with trimethylsilyl groups. The FT Raman spectroscopic results compared with the data obtained by elemental analysis enable not only qualitative verification of synthetic steps, but also a semiquantitative determination of covering of the silica gel surface by derivatization agent.

FT-Raman Spectroscopy of three Foliicolous Lichens from Costa Rican Rainforests

2002 ◽  
Vol 34 (3) ◽  
pp. 259-266 ◽  
Author(s):  
L. F. C. de Oliveira ◽  
H. G. M. Edwards ◽  
J. C. Feo-Manga ◽  
M. R. D. Seaward ◽  
R. Lücking
Keyword(s):  
Raman Spectroscopy ◽  
Calcium Ions ◽  
Calcium Oxalate Monohydrate ◽  
Costa Rican ◽  
Airborne Dust ◽  
Raman Spectroscopic ◽  
Raman Spectroscopic Study ◽  
Foliicolous Lichens ◽  
Ft Raman Spectroscopy ◽  
Ft Raman

AbstractThe first FT-Raman spectroscopic study of foliicolous lichens is reported. Detailed spectra obtained by macroscopic and microscopic means for Calenia triseptata Zahlbr., Echinoplaca strigulacea (Müll. Arg.) R.Sant. and Tricharia carnea (Müll. Arg.) R.Sant. collected from Costa Rican rainforests have been interpreted mainly in terms of their xalate content. The Raman spectra show a significant presence of calcium oxalate monohydrate (whewellite) despite the lack of calcium ions available in the leaf itself. A reasonable explanation for its presence could be the result of the incorporation of calcium ions from airborne dust and/or dissolved in rain falling on the canopy.

scholarly journals Surface-enhanced Raman spectroscopy (SERS): a powerful technique to study the SEI layer in batteries

2021 ◽  
Author(s):  
M. J. Piernas-Muñoz ◽  
A. Tornheim ◽  
S. Trask ◽  
Z. Zhang ◽  
I. Bloom
Keyword(s):  
Raman Spectroscopy ◽  
Solid Electrolyte ◽  
Solid Electrolyte Interphase ◽  
Surface Enhanced Raman Spectroscopy ◽  
Silicon Anode ◽  
Powerful Technique ◽  
Sei Layer ◽  
Surface Enhanced ◽  
Surface Enhanced Raman

The solid electrolyte interphase (SEI) layer on a silicon anode is investigated by SERS.

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