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Solid phase microextraction analysis of volatile constituents of heated palm olein and selected oils

Effect of heating on the development of volatile aroma constituents of palm olein and selected oils was studied. The aroma constituents of heated oils were collected using a solid-phase microextraction (SPME) headspace technique with an adsorbent of a divinylbenzene/carboxen (50/30μm) on polydimethy...

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Main Authors: Omar, Muhammad Nor, Muhd Nor, Nor Nazuha, Idris, Nor Aini
Format: Article
Language:English
Published: Oriental Scientific Publishing Co. 2009
Subjects:
QD Chemistry
Online Access:http://irep.iium.edu.my/10719/1/Solid_phase_microextraction_analysis_of_volatile_constituents_of_heated_palm_olein_and_selected_oils.pdf
http://irep.iium.edu.my/10719/
http://www.orientjchem.org/abstract.php?vabid=a11371
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spelling my.iium.irep.107192011-12-16T05:39:00Z http://irep.iium.edu.my/10719/ Solid phase microextraction analysis of volatile constituents of heated palm olein and selected oils Omar, Muhammad Nor Muhd Nor, Nor Nazuha Idris, Nor Aini QD Chemistry Effect of heating on the development of volatile aroma constituents of palm olein and selected oils was studied. The aroma constituents of heated oils were collected using a solid-phase microextraction (SPME) headspace technique with an adsorbent of a divinylbenzene/carboxen (50/30μm) on polydimethylsiloxane (PDMS) fibre. The extracted volatiles were desorbed from the fibre in the injection port of the gas chromatograph at 250oC and the aroma constituents were identified by GC-MS. The analytical data showed that compounds responsible for the rancidity, i.e hexanal, 2E,4Eheptadienal and 2E,4E-decadienal increased significantly when the oils were heated above 100oC while there were no significant changes in their amounts when heating below 60oC. Meanwhile, the volatile contents were slightly increased when the oils were heated at 80oC. In palm olein, the hexanal content before heating (1.5 μg/g ) was similar with its content (1.6 mg/g) after heating at 60oC. However, when palm olein was heated between 100oC and 180oC the hexanal content increased to 6.4 μg/g and 8.7 mg/g respectively. Similar patterns were also observed when soybean, sunflower and corn oils were heated. In soybean oil, the hexanal content before heating was 3.2 μg/g and rose to 13.2 μg/g after heating at 180oC. The concentration of hexanal in sunflower oil increased from 3.6 μg/g to 12.7 mg/g when the oil was heated at 40oC and 180oC respectively. Meanwhile in corn oil, the hexanal contents before heating and after heating at 180oC were 2.8 μg/g and 13.5 μg/g respectively. Oriental Scientific Publishing Co. 2009-09-10 Article REM application/pdf en http://irep.iium.edu.my/10719/1/Solid_phase_microextraction_analysis_of_volatile_constituents_of_heated_palm_olein_and_selected_oils.pdf Omar, Muhammad Nor and Muhd Nor, Nor Nazuha and Idris, Nor Aini (2009) Solid phase microextraction analysis of volatile constituents of heated palm olein and selected oils. Oriental Journal of Chemistry, 25 (4). pp. 825-832. ISSN 0970 - 020X (P), 2231-5039 (O) http://www.orientjchem.org/abstract.php?vabid=a11371
institution Universiti Islam Antarabangsa Malaysia
building IIUM Library
collection Institutional Repository
continent Asia
country Malaysia
content_provider International Islamic University Malaysia
content_source IIUM Repository (IREP)
url_provider http://irep.iium.edu.my/
language English
topic QD Chemistry
spellingShingle QD Chemistry
Omar, Muhammad Nor
Muhd Nor, Nor Nazuha
Idris, Nor Aini
Solid phase microextraction analysis of volatile constituents of heated palm olein and selected oils
description Effect of heating on the development of volatile aroma constituents of palm olein and selected oils was studied. The aroma constituents of heated oils were collected using a solid-phase microextraction (SPME) headspace technique with an adsorbent of a divinylbenzene/carboxen (50/30μm) on polydimethylsiloxane (PDMS) fibre. The extracted volatiles were desorbed from the fibre in the injection port of the gas chromatograph at 250oC and the aroma constituents were identified by GC-MS. The analytical data showed that compounds responsible for the rancidity, i.e hexanal, 2E,4Eheptadienal and 2E,4E-decadienal increased significantly when the oils were heated above 100oC while there were no significant changes in their amounts when heating below 60oC. Meanwhile, the volatile contents were slightly increased when the oils were heated at 80oC. In palm olein, the hexanal content before heating (1.5 μg/g ) was similar with its content (1.6 mg/g) after heating at 60oC. However, when palm olein was heated between 100oC and 180oC the hexanal content increased to 6.4 μg/g and 8.7 mg/g respectively. Similar patterns were also observed when soybean, sunflower and corn oils were heated. In soybean oil, the hexanal content before heating was 3.2 μg/g and rose to 13.2 μg/g after heating at 180oC. The concentration of hexanal in sunflower oil increased from 3.6 μg/g to 12.7 mg/g when the oil was heated at 40oC and 180oC respectively. Meanwhile in corn oil, the hexanal contents before heating and after heating at 180oC were 2.8 μg/g and 13.5 μg/g respectively.
format Article
author Omar, Muhammad Nor
Muhd Nor, Nor Nazuha
Idris, Nor Aini
author_facet Omar, Muhammad Nor
Muhd Nor, Nor Nazuha
Idris, Nor Aini
author_sort Omar, Muhammad Nor
title Solid phase microextraction analysis of volatile constituents of heated palm olein and selected oils
title_short Solid phase microextraction analysis of volatile constituents of heated palm olein and selected oils
title_full Solid phase microextraction analysis of volatile constituents of heated palm olein and selected oils
title_fullStr Solid phase microextraction analysis of volatile constituents of heated palm olein and selected oils
title_full_unstemmed Solid phase microextraction analysis of volatile constituents of heated palm olein and selected oils
title_sort solid phase microextraction analysis of volatile constituents of heated palm olein and selected oils
publisher Oriental Scientific Publishing Co.
publishDate 2009
url http://irep.iium.edu.my/10719/1/Solid_phase_microextraction_analysis_of_volatile_constituents_of_heated_palm_olein_and_selected_oils.pdf
http://irep.iium.edu.my/10719/
http://www.orientjchem.org/abstract.php?vabid=a11371
_version_ 1643606404525719552
score 13.211869

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