• Journal of Food Hygiene and Safety
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• v.28 no.2
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• pp.130-137
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• 2013

In this study, we investigated the applicability of the photostimulated luminescence (PSL), thermoluminescence (TL), electron spin resonance (ESR) and gas chromatography/mass spectrometry (GC/MS) methods for 5 seeds which are not allowed to be irradiated in Korea. All 5 seeds including evening primrose seed, safflower seed, rape seed, sunflower seed and flax seed were analyzed. Samples were irradiated at 1~10 kGy using a $^{60}Co$ gamma-ray irradiator. In PSL study, the photon counts of all the unirradiated samples showed negative (lower than 700). The photon counts of irradiated (1, 5, 10 kGy) samples showed positive (higher than 5,000). In TL analysis, results showed that it is possible to apply TL method to all foods containing minerals. In ESR measurements, the ESR signal (single-line) intensity of irradiated foods was higher than non-irradiated foods. The hydrocarbons 1,7-hexadecadiene ($C_{16:2}$) and 8-heptadecene ($C_{17:1}$) from oleic acid were detected only in the irradiated samples before and after the treatment at doses ${\geq}$ 1 kGy, but they were not detected in non-irradiated samples before and after treatment. These two hydrocarbons could be used as markers to identify irradiated safflower seed, rape seed, Sunflower seed and flax seed. And then, the hydrocarbons 1,7,10-hexadecatriene ($C_{16:3}$) and 6,9-heptadecadiene ($C_{17:2}$) from linoleic acid were detected in the evening primrose seed, safflower seed and sunflower seed. According to the results, PSL, TL and GC/MS methods were successfully applied to detect the irradiated foods. It is concluded that PSL, TL and GC/MS methods are suitable for detection of irradiated samples and a combined method is recommendable for enhancing the reliability of detection results.

• Korean Journal of Food Science and Technology
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• v.19 no.3
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• pp.279-284
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• 1987

Volatile components of Artemisia selengensis and Cryptotaenia japonica. Korean wild vegetables, were collected by steam distillation. Samples were examined by gas chromatography (GC) and combinded gas chromatography-mass spectrometry (GC-MS). Seven components of ${\alpha}-pinene$, camphene, ${\beta}-pinene$, myrcene limonene, r-terpinene, and caryophyllene, and two components of ${\alpha}-pinene$ and ${\beta}-pinene$ were confirmed respectively in Artemisia selengensis and Cryptotaenia japonica. The remaining components are presumed to be elemene, caryophyllene, and humulene in the latter.

• Applied Biological Chemistry
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• v.31 no.4
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• pp.394-399
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• 1988

Volatile components of Ixeris dentata and Amaranthus mangostanus, Korean wild vegetables, were collected by Steam Distillation-Extraction(SDE) method. Essential oils were analyzed by gas chromatography(GC)and combined gas chromatography-mass spectrometry(GC-MS). Sixty one components, including 13 alcohols, 9 esters, 12 aldehydes, 6 ketones, 9 hydrocarbons, 6 acids, 3 phenols and 3 miscellaneous ones were confirmed in Ixeris dentata. Fifty six components, including 15 alcohols, 5 esters, 13 aldehydes, 8 ketones, 3 hydrocarbons, 9 acids and 5 miscellaneous ones were confirmed in Amaranthus mangostanus.

• Proceedings of the Korean Society for Agricultural Machinery Conference
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• 2002.07a
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• pp.394-399
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• 2002

국민소득의 증대와 함께 소비자의 고품질 농축산물에 대한 수요와 관심이 날로 증가하고 있다 이에 따라 안전하며 고품질인 농축산물을 소비자에게 공급하기 위하여 안전한 농축산물의 생산, 신선도 유지를 위한 유통구조의 개혁, 품질 및 안전성 평가기술개발을 위한 노력이 보다 더 요구되고 있다. 소비자가 믿고 구매하기 위해서는 농축산물에 대한 품질보증이 필수적이며 이를 위해서는 신속하고 정확한 품질 및 유해물질의 판정기술 개발이 필요하다. 많은 농축산물에 있어서 주요 품질인자인 숙도 및 신선도의 변화는 휘발성 화학물질로 이루어진 냄새의 변화로 나타나므로 이를 측정하여 품질 및 안전성을 간접적으로 판정할 수 있다 기존의 냄새에 의한 품질 판정은 판별전문가에 의한 관능평가법 또는 GC(Gas Chromatography)나 GC/MS(Gas chromatograph mass spectrometer)에 의하여 주로 이루어져 왔다. 하지만, 관능평가법의 경우 판별전문가의 개인적인 차이, 피로, 건강상태 등에 따라 판정의 객관성이 떨어질 우려가 있고, GC나 GC/MS를 이용할 경우 냄새분석에 많은 시간과 노력이 소요되는 문제점이 있다. (중략)

• Proceedings of the Korea Air Pollution Research Association Conference
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• 2001.11a
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• pp.249-250
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• 2001

최근 대도시 지역에서의 오존농도가 환경기준을 초과하는 빈도가 날로 증가하고 있는 실정이며, 이에 국내의 경우 오존농도 증가에 대비하여 대기 중 오존농도가 일정기준(시간당 0.12 ppm)보다 높게 나타났을 때 신속하게 경보를 발령, 시민들의 건강과 생활환경상의 피해를 최소화하기 위해 오존경보제를 시행해오고 있다. 한편 전세계적으로 대도시 지역에서의 지표면 오존농도가 환경기준을 초과함에 따라 오존생성과 관련된 전구물질(precursor)에 대한 제어과정이 지표면 오존농도의 저감을 실현하기 위한 가장 시급한 과제로 대두되고 있으며, 특히 미국의 경우 1993년부터 광화학평가측정망(Photochemical Assessment Monitoring Stations;PAMS)을 설치하여 이들 물질에 대한 보다 집중적인 모니터링을 실시하고 있는 것으로 알려져 있다. (중략)

• Korean Journal of Food Science and Technology
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• v.25 no.5
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• pp.494-501
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• 1993

The volatile flavor components of traditional and commercial kochujang were collected by simultaneous steam distillation-extraction (SDE) method. Essential oils were analyzed by gas chromatography (GC) and combined gas chromatography-mass spectrometry (GC/MS). Tested kochujang included Sunchang kochujang prepared with glutinous rice, Boeun kochujang prepared with barley, Sachun kochujang prepared with wheat and commercial kochujang. One hundred and twelve volatile flavor components which included 30 esters, 15 alcohols, 14 aldehydes, 13 acids, 9 ketones, 7 alkenes, 6 phenols, 3 alkanes, 3 pyrazines, 2 benzenes and 2 furans were identified. The major volatile compounds in traditional and commercial kochujang were 2-methyl propanal and ethanol, which represented $21{\sim}36%\;and\;2{\sim}44%$ of total GC peak area, respectively.

• Korean Journal of Food Science and Technology
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• v.23 no.2
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• pp.129-132
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• 1991

The volatile components of Perillae folium were isolated by simultaneous steam distillation-extraction method, and analyzed by combined GC and GC-MS. Among seventeen components indentified 6 alcohols (3-octanol, 1-octen-3-ol, linalool, nerolidol, supathuleol and phytol), 2 ketones, 1 aldehyde, 1 phenol and 7 hydrocarbons were confirmed. The most abundant component was myristicin comprising about 53.4%.

• Applied Biological Chemistry
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• v.33 no.2
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• pp.116-119
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• 1990

The volatile components of the barks of Eucommia ulmoides Oliver were extracts simutaneous steam distillation-extraction apparatus, and analyzed by combined GC and GC-MS. Forty nine componets, including 4 acids, 11 alcohols, 9 aldehydes, 4 esters, 3 ketones, 16 hydrocarbons, 1 lactone were confirmed in Eucommiae cortexs. Among total volatiles the most component was caproic acid comprising about 18.1%.

• The Korean Journal of Food And Nutrition
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• v.10 no.1
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• pp.1-5
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• 1997

The volatile components of Lycium chinensis Miller were isolated by simultaneous steam distillation-extraction(SDE) method and analyzed by combined GC and GC-MS. Fifty-four volatile components, including 12 alcolhols 12 esters, 7 aldehydes, 6 acids, 5 ydrocarbons, 8 ketones, 1 furan and 3 pyrazines were confirmed in the fruit of Lycium chinensis Miller. The major components were hexadecanoic acid ethyl ester, 1-octadecanone, tetrapyrazine, 2-furancarboxaldehyde and ethyl linoleate.

• Journal of the Korean Society of Food Science and Nutrition
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• v.27 no.4
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• pp.563-567
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• 1998

Volatile flavor components of edible portion of leek(Allium tuberosum R.) were extracted by SDE(simultaneous steam distillation and extraction) method using the mixture of n-pentane and diethylether (1 : 1, v/v) as an extract solvent and analyzed by GC-FID and GC/MS. Identification of the volatile flavor components was mostly based on the RI of GC and mass spectrum of GC/MS. A total of sixty-five components from leek extract were classified as 28 sulfur-containing compounds, 12 aldehydes, 9 alcohols, 4 lactones and esters, 3 acids and hydrocarbons, and 2 miscellaneous compouds. The sulfur-containing compounds were predominant in leek extract. Dimethyl disulfide(19.47%) and dimethyl trisulfide(17.38%) were the main compounds and trans-1-propenyl methyl disulfide, trans-2-hexenal and methyl allyl disulfide were also detected large amounts in leek.