Laser raman spectroscopy. Analytical applications

Barańska, H; Łabudzińska, A.; Terpinski, Jacek; Cook, Bernard W.

doi:10.1016/s0003-2670(00)81982-0

Cited by 36 publications

(49 citation statements)

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“…An additional signal, which appears at a shoulder, at about 2876 cm -1 was observed which was assigned to stretching vibrations in CH 2 groups bonded to an unsaturated carbon atom (-CH 2 -CH=CH-) present in unsaturated fatty acids. The bonding of an unsaturated carbon atom to a CH 2 group shifts the absorption band for the C-H bond in the methylene group (Baranska, et al, 1987). A sixth signal was observed above 3000 cm -1 due to stretching vibrations of the C-H bond of =C-H groups in fatty acid chains.…”

Section: Raman Spectramentioning

confidence: 97%

Characterization of macadamia and pecan oils and detection of mixtures with other edible seed oils by Raman spectroscopy

Carmona¹,

Lafont²,

Jiménez‐Sanchidrián³

et al. 2015

Grasas y Aceites

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SUMMARY:Authenticating fats and detecting their adulteration with substantially cheaper fats can pose major problems for producers of high-value oils for nutritional and cosmetic use. In this work, we used Raman spectroscopy to discriminate macadamia and pecan oils from other, cheaper vegetable oils including corn and sunflower oils. This technique additionally allows one to detect and assess the adulteration of macadamia oil with another vegetable oil. KEYWORDS: Adulteration of oils; Macadamia oil; Pecan oil; Raman spectroscopyRESUMEN: Caracterización de aceites de macadamia y de nuez pecanera y detección de mezclas con otros aceites de semillas comestibles por espectroscopía Raman. La autentificación de grasas para detectar su adulteración con otras grasas más baratas es uno de los principales problemas a los que se enfrentan los productores de aceites de alto valor, ya sea para uso alimentario o para uso cosmético. En este trabajo se emplea la espectroscopia Raman, por un lado, para caracterizar los aceites de macadania y de nuez pecanera, de alto valor y diferenciarlos de otros más baratos, como los de maíz y de girasol, y por otro, para detectar mezclas del aceite de macadamia con estos aceites vegetales más baratos.

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Section: Raman Spectramentioning

confidence: 97%

Characterization of macadamia and pecan oils and detection of mixtures with other edible seed oils by Raman spectroscopy

Carmona¹,

Lafont²,

Jiménez‐Sanchidrián³

et al. 2015

Grasas y Aceites

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show abstract

“…Usually the symmetric vibration is stronger than antisymmetric one in the Raman spectra and the contrary holds in infrared [14,15]. This could be due to the electron withdrawing substituent adjacent to the nitro group which tends to increase the frequency of asymmetric vibration and decrease that of the symmetric vibration.…”

Section: Wwwcrt-journalorgmentioning

confidence: 99%

Investigations on the growth, optical behaviour and factor group of an NLO crystal: L‐alanine alaninium nitrate

Aravindan

Srinivasan

Vijayan

et al. 2007

Cryst. Res. Technol.

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Amino acid family crystals exhibit excellent nonlinear and electro-optical properties. L-alanine alaninium nitrate (LAAN) single crystal belonging to the amino acid group was grown by slow cooling solution growth technique. The High resolution X-ray diffraction (HRXRD), Fourier transform infrared (FTIR) spectroscopy, Raman spectroscopy, UV-Vis., Photoluminescence (PL) and Factor group analyses were carried out. The factor group analysis reveals 183 internal vibrations for the title compound. The second harmonic generation property was tested by Kurtz-Perry powder technique.

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“…This is called Stokes scattering (vR(StJ) (Diem 1993;Grasseli & Bulkin 1991;Schrader 1996). uR(StJ in view of the difference of population of the ground excited electronic states in a set of molecules at room temperature (Baranska, Labudzinska & Terpinski 1987). The Raman spectra presented in this chapter concern only the Raman-Stokes scattering bands.…”

Section: Raman Spectroscopymentioning

confidence: 99%

“…• inter-atomic distances • spatial arrangement groups • Fermi resonance • physical state of the sample • polarity of the environment • formation of hydrogen bonds • inductive, mesomeric, and field effects of neighboring groups In this way, the difference in the force constant, for example, explains that the stretching frequency of double bonds is higher than that of single bonds (Baranska, Labudzinska & Terpinski 1987;Diem 1993;Grasseli & Bulkin, 1991).…”

Section: Band Position and Intensitymentioning

confidence: 99%

See 1 more Smart Citation

Olive Oil Analysis by Infrared and Raman Spectroscopy: Methodologies and Applications

Baeten¹,

Aparicio²,

Marigheto³

et al. 2000

Handbook of Olive Oil

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Laser raman spectroscopy. Analytical applications

Cited by 36 publications

References 0 publications

Characterization of macadamia and pecan oils and detection of mixtures with other edible seed oils by Raman spectroscopy

Characterization of macadamia and pecan oils and detection of mixtures with other edible seed oils by Raman spectroscopy

Investigations on the growth, optical behaviour and factor group of an NLO crystal: L‐alanine alaninium nitrate

Olive Oil Analysis by Infrared and Raman Spectroscopy: Methodologies and Applications

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