• Title, Summary, Keyword: GC and GC/MSD analysis

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Analysis of Volatile Organic Compounds in Kinnchi Absorbed in SPME by GC-AED and GC-MSD (SPME로 포집한 김치 휘발성분의 GC-AED및 GC-MSD에 의한 동정)

  • 하재호
    • Journal of the Korean Society of Food Science and Nutrition
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    • v.31 no.3
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    • pp.543-545
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    • 2002
  • The volatile compounds in kimchi adsorbed with solid phase microextraction (SPM) were analyzed by using a gas chromatograph-atomic emission detector (GC-AED) and a gas chromatograph-mass spectrometer (GC-MSD). The volatile compounds were effectively adsorbed in SPME. Twenty five compounds such as dimethyl-sulfide were identified by GC-MSD and some of these were further confirmed to contain a sulfur and a nitrogen by GC-AED.

A Study on the Analysis of Pesticide Residue in Banana by GC/MSD (GC/MSD를 이용한 바나나 중에서의 잔류농약 분석법에 관한 연구)

  • 박성수;김동원
    • The Korean Journal of Food And Nutrition
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    • v.9 no.2
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    • pp.217-222
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    • 1996
  • We studied about analyzing carbamate pesticides, organochlorine, organophosphorus pesticides simultaneously using by GC/MSD. For this, instead of HPLC which is generally used in analyzing carbamate pesticides, GC was used and all hydrogen of -NH group in carbamate pesticides were substituted for trifluoroacetyl group which is stable at heat And eight pesticide resdidues were not detected in nine samples circulated in the city.

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Rapid Analysis of Major Putrefactive Metabolites by GC and GC/MSD (GC 및 GC/MSD를 이용한 주요 분변 부패산물 신속분석법)

  • 박규용;김민철;우강융;이나경;백현동
    • KSBB Journal
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    • v.18 no.1
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    • pp.74-77
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    • 2003
  • A simple, reproducible, and rapid gas chromatographic method for putrefactive metabolite determination in feces was developed. The method involves the direct injection of fecal supernatants into the gas chromatograph, without pretreatment. The mass spectra of these metabolites were obtained using an HP 5971 mass selective detector operated in electron impact (EI) ionization mode. This method produced sharp peaks and allowed the simultaneous determination of fecal putrefactive metabolites.

Simultaneous Analysis of Ethanol and Harmful Components by GC in Alcoholic Liquors (GC를 이용한 주류중 에탄올 및 유해 성분의 동시 분석법)

  • 정의한;이명자;강금자;문혜성;유병옥;황정구;장준식
    • Journal of Food Hygiene and Safety
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    • v.7 no.1
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    • pp.45-48
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    • 1992
  • In Food revolution of Korea, colorimetries or a titration methods are introduced for the analysis of alcoholic liquors. But, these wet analyses have disadvantages such as individual errors, long process time, and sometimes tedious pretreatments. In the process of making alcoholic liquors, fusel oils are produced as by products. Five main fusel components that could be produced are 2-propanol, n-propanol, iso-butanol, n-butanol, and isoamyl alcohol. Also acetaldehyde and methanol could be produced as by-products of ethanol. With using capillary FFAP column in GC or GC/MSD, we analysed these five fusel components as well as internal standard (acetonitrile) including methanol, acetaldehyde and ethanol simultaneously. We obtained excellent mass spectra as qualitative data of all species. We also took excellent quantitative data with GC by using the internal standard method.

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Analysis of Volatile Compounds in the Gardenia Absoulute Oil (Gardenia Absolute Oil을 구성하고 있는 휘발성 성분의 분석)

  • Ha, Chang-Gyu;Yang, Hae-Ju;Yun, Seok-Sin
    • Journal of the Society of Cosmetic Scientists of Korea
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    • v.19 no.1
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    • pp.31-56
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    • 1993
  • The characteristic aroma of Gardenia Absolute Oil made from Gardenia Jasminoides Ellis was investigated by GC and GC-MSD and by sensory evaluation The method of GC Analysis was used Double Column System by Carbowax 20M /SPB-1 of Pola/nonPola columns. And the result data of analysis was checked automatic Relent ion Indexs Match System by GC Workstation. A total of 51 compounds were identified in Gardenia Absolute Oil, including t entatively erstimated 9 compounds. The major components were Linalool, Farnesene of various form, Jasmin Lactone, Gamma undecalactone and Cis-3-hexone derivatives.

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Analysis of 4-hydroxy-3-methoxybenzaldehyde pyrolyzates by Curie-point pyrolyzer-GC/MSD (Curie-point pyrolyzer-GC/MSD를 이용한 4-hydroxy-3-methoxybenzaldehyde의 열분해물 분석)

  • Yu, Euy Kyung;Kim, Ok-Chan
    • Applied Chemistry for Engineering
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    • v.8 no.1
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    • pp.8-15
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    • 1997
  • This study was carried out to present a analysis of pyrolytic degradation of 4-hydroxy-3-methoxybenzal dehyde(vanillin) pyrolyzed at $330^{\circ}C{\sim}920^{\circ}C$ by Curie-point pyrolyzer connected with GC/MSD by on-line system. Identified by GC/MSD were 100 pyrolytic products of vanillin. The pyrolysis of the compound gave benzene, phenol, 1,3-cyclopentadiene, methyl benzene, benzaldehyde, benzofuran, and cresol as major products, which were produced by pyrolytic degradation and synthesis of vanillin radicals.

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Analysis of Benzophenone in Sediment and Soil by Gas Chromatography/Mass Spectrometry (기체크로마토그래피/질량분석기에 의한 저질 및 토양시료 중 벤조페논의 분석법 연구)

  • 권오승;김은영;류재천
    • Environmental health and toxicology
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    • v.16 no.3
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    • pp.121-126
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    • 2001
  • Analytical method of benzophenone (BP) in sediment and soil was developed by gas chromatography/mass selective detector/selected ion monitoring (GC/MSD/SIM). The ultrasonic extraction of US EPA (method 3550B) method and liquid-liquid extraction for sediment and soil samples were used for the analysis of BP from sediment and soil. BP was extracted with n-hexane. Organic layer was washed with 5% sodium chloride solution. 1∼2 l of the concentrated solution of organic layer was applied to GC/MSD. The retention time of BP peak was 11.10 min. Recovery (%) of BP by ultrasonication from sediment and soil samples was 96.0∼100.6% and 40.0∼83.0%, respectively. Recovery of BP by liquid-liquid extraction was 51∼59% in soil samples. The detection limit of BP in sediment and soil samples were determined to 0.1 ng/g.

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Analysis of Higenamine Contents in Plants with HPLC and GC/MSD (HPLC 및 GC/MSD를 이용한 식물 중의 Higenamine 함량 분석)

  • YunChoi, Hye-Sook;Suh, Young-Bae;Hahn, Young-Hee;Song, Yun-Seon;Ryu, Jae-Chun;Chung, Kyo-Soon
    • Korean Journal of Pharmacognosy
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    • v.29 no.2
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    • pp.129-135
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    • 1998
  • Higenamine is known as a cardiotonic principle of Aconiti tuber. The analytical procedures were established for the detection of higenamine in plants. The amounts of higenamine in several Aconiti tubers and the embryo of Nelumbo nucifera, another plant species known to contain higenamine, were determined. The $H_2O$ soluble fraction prepared from MeOH extract was first treated with AD-2 resin and then applied to either HPLC or GC/MSD systems. With HPLC, $6.4{\sim}19.2\;{\mu}g/g$ of higenamine were detected from various Aconiti tubers and $182.3\;{\mu}g/g$ of higenamine from the embryo of Nelumbo nucifera. The results obtained with GC/MSD also provided comparable data with those obtained with HPLC.

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Gas Chromatographic Analysis of TDI, MDI and HDI Using 2-Chlorobenzyl Alcohol and 2,4-Dichlorobenzyl Alcohol Derivatives (2-클로로벤질 알코올 및 2,4-디클로로벤질 알코올 유도체를 이용한 TDI, MDI 및 HDI의 가스크로마토그래피 분석)

  • Yun, Ju-Song;Park, Jun-Ho;Lee, Kang-Myoung;Choi, Hong-Soon;Cho, Young-Bong;Koh, Sang-Baek;Cha, Bong-Suk
    • Journal of Korean Society of Occupational and Environmental Hygiene
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    • v.16 no.3
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    • pp.222-232
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    • 2006
  • Objectives: The objective of this study was to propose the total isocyanate analytical method which involves derivation of 2,4-toluene diisocyanate(2,4-TDI), 2,6-toluene diisocyanate(2,6-TDI), 4,4'-methylenediphenyl diisocyanate(4,4'-MDI) and 1,6-hexamethylene diisocyanate(1,6-HDI) using 2-chlorobenzyl alcohol(2-CBA) or 2,4-dichlorobenzyl alcohol(2,4-DCBA), and analyzing of hydrolysate of the synthesized urethane with the gas chromatography(GC)/flame ionization detector(FID), GC/pulsed discharge ionization detector-electron capture detector(PD-ECD) and GC/mass selective detector(MSD). Methods: Urethanes were synthesized by reacting 2,4-TDI, 2,6-TDI, 4,4'-MDI and 1,6-HDI to 2-CBA or 2,4-DCBA. Urethanes was verified by TLC, HPLC/UVD and GC/MSD. For field application, the most suitable condition that 2-CBA coated in glass fiber filter removed completely and urethanes were not removed was searched. 2-CBA generated from hydrolysis of urethanes according to hydrolysis conditions. Diisocyanates were collected on field air and analyzed. Results: Urethanes which were white and solid phase synthesized by reacting 2,4-TDI, 2,6-TDI, 4,4'-MDI, 1,6-HDI and 2-CBA or 2,4-DCBA. And urethanes were verified by TLC, HPLC/UVD and GC/MSD. The most suitable conditions to remove 2-CBA coated in glass fiber filter were $87^{\circ}C$ and 20 mmHg and urethanes were not removed under same condition. Hydrolysis yields of urethanes were 99 % to 111 %. 2-CBA, the hydrolysate of urethanes was analyzed by GC/FID, GC/PD-ECD and GC/MSD. Conclusions: Simultaneous analysis of 2,4-TDI, 2,6-TDI, 4,4'-MDI and 1,6-HDI deriving with 2-CBA and 2,4-DCBA, along with a total isocyanate analysis, was feasible with GC/FID, GC/PD-ECD and GC/MSD. This result will be a guide of further study on total isocyanate analysis.

Quality Control(QC) Analysis of Ambient VOCs in Canisters Using GC/MSD Method (Canister와 GC/MSD를 이용한 대기 중 VOCs 분석시스템의 정도관리(QC))

  • Jeon, Jun-Min;Hur, Dang;Kim, Dong-Sool
    • Journal of Korean Society for Atmospheric Environment
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    • v.18 no.6
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    • pp.527-538
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    • 2002
  • In this study, the performance of sampling and of analytical methodology was examined against a number of selected volatile organic compounds (VOCs) in the ambient air. The canister-based sampling method for VOCs has been a viable and widely used approach that is based on research and evaluation performed over the past several years. VOCs were determined using canisters by GCMSD analysis. A total of target analyses in this study included approximately 30 VOCs designated in TO-l4A categories including BTEX. The methodology for QC(quality control) was intensively investigated with a wide range of performance criteria such as; (1) cleanliness of canisters, (2) reproducibility of diluter, (3) instrumental detection limits of preconcentrator and GCMSD, and (4) precision and accuracy of GCMSD. For most of the compounds tested, precision was less than $\pm$5%, IDL was 0.2 ppbv, accuracy was $\pm$5%, respectively. This study demonstrated that the combination of canister sampling and GC/MSD analysis could be reliably applied to the measurements of BTEX in ppbv levels that are typically observed in/outdoor air environment.