Gas chromatographic and electron spin resonance investigations of .gamma.-irradiated shrimp

When fats are irradiated, some of the major stable products formed are hydrocarbons. The most abundant radiolytic hydrocarbons are formed during various free-radical reactions as the result of the loss of CO2. An extraction procedure followed by capillary gas chromatography (GC) to monitor the forma...

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Bibliographic Details
Published inJournal of agricultural and food chemistry Vol. 40; no. 10; pp. 1963 - 1971
Main Authors Morehouse, Kim M, Ku, Yuoh
Format Journal Article
LanguageEnglish
Published Washington, DC American Chemical Society 01.10.1992
Subjects
ALIMENTOS
Biological and medical sciences
CHROMATOGRAPHIE EN PHASE GAZEUSE
CREVETTE
CROMATOGRAFIA DE GASES
ESPECTROMETRIA
ESPECTROSCOPIA ESR
Fish and seafood industries
Food industries
Fundamental and applied biological sciences. Psychology
GAMBAS Y CAMARONES
HIDROCARBUROS
HYDROCARBURE
IRRADIACION
IRRADIATION
PRODUIT ALIMENTAIRE
RADIACION GAMMA
RAYONNEMENT GAMMA
REACCIONES QUIMICAS
REACTION CHIMIQUE
SPECTROMETRIE
SPECTROSCOPIE RSE
Hydrocarbon
EPR spectrometry
Prawn
Macrura
Crustacea
Gas chromatography
Edible crustacean
Gamma irradiation
Arthropoda
Analytical method
Irradiation
Decapoda
Invertebrata
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Summary:When fats are irradiated, some of the major stable products formed are hydrocarbons. The most abundant radiolytic hydrocarbons are formed during various free-radical reactions as the result of the loss of CO2. An extraction procedure followed by capillary gas chromatography (GC) to monitor the formation of these radiolytic hydrocarbons in gamma-irradiated shrimp has been developed. Shrimp contain appreciable amounts of palmitic, palmitoleic, stearic, oleic, and linoleic acids. When irradiated, these fatty acids form the hydrocarbons pentadecane, 8-pentadecane, heptadecane, 8-heptadecene, and 6,9-heptadecadiene, respectively. The yield of these radiolytic hydrocarbons was found to be linear with absorbed dose. Data indicating the utility of the capillary GC technique for identifying radiation-treated shrimp are presented. The potential use of electron spin resonance (ESR) spectroscopy, another irradiation detection technique, to monitor the formation of free radicals trapped in irradiated shrimp shell and problems associated with using ESR spectroscopy are also described
Bibliography:9501602
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SourceType-Scholarly Journals-1
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content type line 23
ISSN:0021-8561
1520-5118
DOI:10.1021/jf00022a047