National Institute of Standards and Technology における超伝導研究及び生活

Food Composition and Nutrition Tables

Simultaneous determination of Cd(II) and Pb(II) ions in honey and milk samples using a single-walled carbon nanohorns modified screen-printed electrochemical sensor.

Voltammetric determination of Pb, Cd, Zn, Cu and Se in milk and dairy products collected from Iran: An emphasis on permissible limits and risk assessment of exposure to heavy metals.

Determination of toxic heavy metals and speciation of arsenic in seaweeds from South Korea

Analysis of minor and trace elements in milk and yogurts by inductively coupled plasma-mass spectrometry (ICP-MS).

Method validation for simultaneous determination of chromium, molybdenum and selenium in infant formulas by ICP-OES and ICP-MS

Origin authenticity of the animals used as food has always been a major concern to consumers around the world. In the past twenty years, a stable isotope ratio has been used for origin authentication. In this study, pork samples, both local and imported, were collected from the major markets from all around South Korea and analyzed for stable isotope ratios of nitrogen (δ 15 N‰) and carbon (δ 13 C‰), using Isotope Ratio Mass Spectrometry (IR-MS). A total of 599 samples with 335 Korean and 264 imported from 13 countries within America and Europe were investigated in accordance to the standard established methods for isotope ratio analysis. The results showed a significant variation related to the origin of the samples, explaining the difference in the feeding styles of the pork in each country. The stable isotope ratio values of carbon (δ 13 C‰) were found in the decreasing order of: America (-15.55±1.01‰)>Korea (-19.62±0.89‰)>Europe (-24.79±1.35‰). Canada was having δ 13 C ratio of -22.87±0.92‰, which is very low in the region of America and very close to Europe (-23.78 to 27.17‰). For nitrogen δ 15 N‰ the order was: America (4.92±0.71‰)>Europe (4.54±0.66‰)>Korea (3.69±0.54‰), with a slight variation among countries in each region studied. From the results it was concluded that the stable isotope ratio of the pork samples from different countries provide enough information about the origin and is therefore a potential tool which can be employed for origin authentication.

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Application of Stable Isotope Ratio Analysis for Origin Authentication of Pork

Food irradiation processing needs proper control to facilitate consumer assurance, choice, and protection, including accurate detection of irradiated food. This study was aimed at analyzing hydrocarbons induced by gamma and electron beam irradiation in Camembert and processed cheeses. The samples were irradiated at 0, 1, 3, 5, 7, and 10 kGy doses of γ-rays and an electron beam. The induced hydrocarbons were separated on a florisil column and identified by gas chromatography-mass spectrometry (GC-MS). The detected hydrocarbons were pentadecane and 1-tetradecene from palmitic acid, heptadecane and 1-hexadecene from stearic acid, and 8-heptadecene and 1,7-hexadecadiene from oleic acid. The concentrations of the radiation-induced hydrocarbons increased with irradiation dose. Among the induced hydrocarbons, 1-tetradecene and 1,7-hexadecadiene were found to be the major hydrocarbons in the cheese samples. For most irradiation doses, the concentration of hydrocarbons induced by the electron beam was slightly hig...

Determination of Radiation Induced Hydrocarbons in Irradiated Camembert and Processed Cheese by GC-MS

Asbstract Food irradiation has recently become one of the most successful techniques to preserve food with increased shelf life. This study aims to analyze hydrocarbons in almonds (Prunus amygosalus L.) and peanuts (Arachis hypogaea) induced by electron beam irradiation. The samples were irradiated at 0, 1, 3, 5 and 10 kGy by e-beam and using florisil column chromatography fat, and content was extracted. The induced hydrocarbons were identified using gas chromatography-mass spectrometry (GC/MS). The major hydrocarbons in both irradiated samples were 1,7-hexadecadiene (C16:2) and 8-heptadecene (C17:1) from oleic acid, 1,7,10-hexadecatriene (C16:3) and 6,9-heptadecadiene (C17:2) from linoleic acid and 1-tetradecene (C 14:1 ) and pentadecane (C 15:0 ) from palmitic acid. Concentrations of the hydrocarbons produced by e-beam were found to be depended upon the composition of fatty acid in both almonds and peanuts. The Cn-2 compound was found to be higher than C n-1 compound in oleic acid and palmitic acid, while in case of linoleic acid, C n-1 compound was higher than Cn-2 compound. The radiation induced hydrocarbons were detected only in irradiated samples, with 1 kGy or above, and not in the non-irradiated ones. The production of 1,7-hexadecadiene (C 16:2 ), 8-heptadecene (C 17:1 ), 1,7,10hexadecatriene (C16:3) and 6,9-heptadecadiene (C17:2), in high concentration gave enough information to suggest that these may be the possible marker compounds of electron beam irradiation in almonds and peanuts.

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In Seon Jeong

Papers

Analysis of minor and trace elements in milk and yogurts by inductively coupled plasma-mass spectrometry (ICP-MS).

Method validation for simultaneous determination of chromium, molybdenum and selenium in infant formulas by ICP-OES and ICP-MS

Application of Stable Isotope Ratio Analysis for Origin Authentication of Pork

Determination of Radiation Induced Hydrocarbons in Irradiated Camembert and Processed Cheese by GC-MS

Detection of Hydrocarbons Induced by Electron Beam Irradiation of Almond (Prunus amygosalus L.) and Peanut (Arachis hypogaea)