• Title/Summary/Keyword: GC-MS

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Analysis of Mint Essential Oils from Jeju Island, Korea by Gas Chromatography-mass Spectrometry and Headspace-Gas Chromatography-mass Spectrometry (Gas Chromatography-mass Spectrometry와 Headspace-Gas Chromatography-mass Spectrometry를 이용한 제주산 민트 에센셜오일 성분 분석)

  • Hyun, Ho Bong;Boo, Kyung Hwan;Kang, Hye Rim;Kim Cho, Somi
    • Journal of Applied Biological Chemistry
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    • v.58 no.2
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    • pp.175-181
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    • 2015
  • Compositions of essential oils extracted from mint herb such as Mentha piperita, Mentha spicata, and Mentha ${\times}$ piperita var. citrate produced in Jeju were analyzed using gas chromatography-mass spectrometry (GC-MS) and headspace-GC-MS (HS-GC-MS). By the GC-MS analysis, 13 compounds were tentatively identified in Mentha piperita, Mentha spicata, and Mentha ${\times}$ piperita var. citrate, respectively. Peperitenone oxide, carvone, and linalool were detected as major compounds in Mentha piperita, in Mentha spicata, in Mentha ${\times}$ piperita var. citrate, respectively, based on the ratio of peak intensity in the total ion chromatogram. The greater number of compounds, including volatile alcohols and acetates were identified by HS-GC-MsS than by GC-MS in these all three essential oils. Similar patterns of composition were detected in both Mentha spicata and Mentha ${\times}$ piperita var. citrate by either one of GC-MS methods. However, in case of Mentha piperita, $\small{L}$-(-)-menthol, which was identified as the major compound by HS-GC-MS was detected in dramatically reduced quantity by GC-MS. Interestingly, we found that both linalyl acetate and linalool were identified as the dominant compounds in the essential oil of Mentha ${\times}$ piperita var. citrate.

Analytical Characteristics of GC/MS and HPLC according to the Concentration Distribution of PAHs (PAHs 농도 분포에 따른 GC/MS와 HPLC의 분석특성에 관한 연구)

  • Hong, Jwa-Ryung;Choi, Kwang-Min
    • Journal of Korean Society of Occupational and Environmental Hygiene
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    • v.25 no.3
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    • pp.312-321
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    • 2015
  • Objectives: The purpose of this study was to determine the best method to analyze PAHs at extremely low concentrations. To this end, 16 PAHswere analyzed simultaneously by GC/MS, HPLC/FLD and HPLC/UVD, and the analytical characteristics of HPLC and GC/MS were compared. Methods: This study was conducted by GC/MS and HPLC/FLD/UVD, and evaluated linearity, precision and detection limit. Standard solutions were prepared for 21 samples in the range of $0.00001{\sim}1.0{\mu}g/mL$ and the samples were divided into four groups. All samples were made in three sets and analysis was replicated seven times. Results: Sixteen PAHs could be simultaneously separated by HPLC and GC/MS, and the adequate equipment was HPLC/FLD. The retention times by HPLC were shorter than GC/MS, and HPLC had better separation for most PAHs than GC/MS. The peaks of naphthalene and naphthalene-D8 partially overlapped for GC/MS. HPLC/FLD had a 20-2000 times lower limit of detection than GC/MS and UVD. However FLD was not adequate for analyzing acenaphthylene because it has too low a fluorescence quantum yield to be detected. The precision of HPLC/FLD/UVD and GC/MS showed less than 20% at $0.001{\mu}g/mL$ PAHs and when the concentration was higher, the coefficient of variation was decreased. HPLC/FLD was better for the overall detection of limits. Conclusions: The results indicate that the HPLC/FLD method has good linear range, precision and a detection of limits from $0.00001{\sim}0.0001{\mu}g/mL$ for all 16 PAHs. This study contributes to providing useful data for analysis technology and can be applied to occupational exposure measurement for PAHs in workplaces.

Analysis of Binding Media Used in Mural Painting of Temple Wall by Pyrolysis/GC/MS and IR (열분해/GC/MS와 IR을 이용한 사찰 벽화 시편 교착제 분석)

  • Park, Jongseo;Lee, Jeong Won
    • Journal of Conservation Science
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    • v.33 no.5
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    • pp.345-354
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    • 2017
  • A mural was discovered in the Ssanggyesa temple located in Jindo island, during repair of the Daeungjeon Hall. A study was conducted to determine the binding medium used for preparing the mural. Pyrolysis/GC/MS and IR spectrometry were used to analyze a painting specimen. Direct approach and on-line methylation approach were attempted for the pyrolysis/GC/MS. In IR analysis, the spectra of the specimen were found to be different from those of Asian lacquer, yellow lacquer, animal glue, and acrylic emulsion resin. They were also not identical to the standard IR spectra of drying oils such as linseed oil. Pyrolysis/GC/MS results of the specimen were different from those of Asian lacquer, yellow lacquer, animal glue, and acrylic emulsion resin. In the mean time, palmitic acid, octadecanoic acid, nonanedioic acid, and octadecenoic acid, which are characteristic pyrolysis products of dried drying oil, were detected. In addition, the pyrolysis/GC/MS chromatograms of the specimen and dried drying oil were also very similar. Therefore, it was concluded that the painting was prepared using drying oil as a binding medium.

GC/MS and its applications for the analysis of cosmetic produtcts (GC/MS와 화장품 분석의 응용)

  • 노경원
    • Journal of the Society of Cosmetic Scientists of Korea
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    • v.19 no.1
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    • pp.1-19
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    • 1993
  • Gas chromatography serves to separate the mixtures into its components, and mass spectrometer is used to analyzing of unknown compounds. But there are many problems the identification of horn compounds using by GC only. As this reason GC/MS a very powerful analyzing technique. Mass spectrometer consists of 1) inlet stem 2) ion source 3) Bass filter 4) detectors and 5) data system. There are two analyzing modes in the GC/MS, those are scan and SIM(selected ion mom toping) modes. Scan mode is used when analyzing unknown compounds and SIM mode al lows the mass spectrometer to detect specific compound with very high sensitivity. As GC/MS applications for the analysis of cosmetic products, volatile compounds in lotion, earn foundation and hair color, and carbon distribution of fatty acids in soap were performed. Also as a new sample pre-treatment technique, head space sampler/GC/MS introduced in order to analyze the volatile compounds in a toothpaste.

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Development of Multi-residue Analysis of 320 Pesticides in Apple and Rice Using LC-MS/MS and GC-MS/MS (LC-MS/MS와 GC-MS/MS를 이용한 사과와 쌀 시료에서 320종 농약의 다성분 분석)

  • Kim, Jong-Hwan;Kim, Yeong-Jin;Kwon, Young-Sang;Seo, Jong-Su
    • The Korean Journal of Pesticide Science
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    • v.20 no.2
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    • pp.104-127
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    • 2016
  • A new analytical method has been developed to determine 320 pesticides in apple and rice. The extraction of pesticides was carried out based on QuEChERS sample extraction, and determination was performed using LC-MS/MS and GC-MS/MS. 320 pesticides were selected for experiments. 251 and 110 pesticides among them were analysed by LC-MS/MS and GC-MS/MS, respectively. 41 pesticides of them were analyzed by both GC-MS/MS and LC-MS/MS. Among pesticides analysed by LC, 242 pesticides (96% of total number) in apple and 237 pesticides (94% of total number) in rice showed recoveries in the range of 70~120% with RSD ${\leq}20%$. In case of pesticides analyzed by GC-MS/MS, 103 pesticides (94% of total number) in apple and 83 pesticides (76% of total number) in rice were successfully validated. These results indicated that LC-MS/MS and GC-MS/MS analysis with the QuEChERS sample preparation can be partly applied to multi-residue pesticides in agricultural products.

Analysis of Cyclofenil and its Metabolites in Human Urine using GC/MS (GC/MS를 이용한 소변중의 Cyclofenil 및 그 대사체의 분석)

  • Myung, Seung-Woon;Min, Hye-Ki;Cho, Hyun-Woo;Kim, Dong-Hyun;Kim, Myungsoo
    • Analytical Science and Technology
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    • v.15 no.3
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    • pp.185-189
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    • 2002
  • International Olympic Committee (IOC) prohibits the use of cyclofenil for male. To prove whether cyclofenil product was taken or not, the analytical method in urine using GC/MS was established. The extraction recoveries of cyclofenil and its metabolites were higher in the range of pH 5-9. Because the parent drug (cyclofenil) was not excreted in urine, metabolites were detected and theses were used as a criteria of cyclofenil dose. Therefore the metabolites were hydrolyzed, extracted at pH 9.6, derivatized with MSTFA and analyzed by GC/MS.

Geographical origin discrimination of Korean variety, Angelica gigas Nakai by using TDU (Thermal Desorption Unit)-GC/MS (TDU-GC/MS를 이용한 한국품종 참당귀 국산 판별 기법)

  • Lee, Mi-Na;Kim, Yoon-Suk;Kim, Won-Il;Kim, Jeong-Gyu;Kwon, Oh-Kyung
    • Journal of Applied Biological Chemistry
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    • v.63 no.1
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    • pp.29-33
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    • 2020
  • The objective of this study was to develop a fast and accurate method of variety discrimination and geographical discrimination origin of Korean angelica (Korean variety, Angelica gigas Nakai) by using TDU-GC/MS. Two peaks of decursin and decursinol, which are coumarin derivatives were identified in the range of Total Ion Chromatogram (TIC) RT 26.9-27.2 of the Korean angelica by GC/MS analysis at the time of condensation in a refrigerated condensation system after thermal desorption of sample extracts. In case of Chinese angelica (Chinese variety), ligustilide peak was detected at the RT 17.2. In order to investigate the difference of volatile components according to the geographical origin of Korean variety, the mass spectra were measured by TDU-GC/MS at the range of m/z 40-400 amu. The TIC of domestic cultivation and Chinese cultivation of the Korean variety, Angelica gigas Nakai showed the same tendency as a whole. However, in partial scans of TIC, two peaks detected at 15.54 and 16.05 of RT showed different peak patterns between Korean angelica (Korean variety) cultivated in Korea and in China. The ratio of Peak A (RT 15.54) and B (RT 16.05) was 0.0-0.2 for domestic cultivation and 0.5-2.8 for Chinese cultivation, confirming the possibility of discriminating origin by comparing the TIC peak pattern of TDU-GC/MS.

Analysis of Plant Hormones using GC-MS (GC-MS를 이용한 식물홀몬 분석)

  • 조광연
    • KOREAN JOURNAL OF CROP SCIENCE
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    • v.34 no.s01
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    • pp.26-32
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    • 1989
  • The analytic principles of GC and MS were explained in relation to plant hormone analyses and the characteristics of two instruments were compared. The selection of column, condition of measurement and the method of ionization to get a good spectrum were also briefly described. Finally, the pre-treatment of sample by solvent extraction method to remove the unnecessary part of sample and the synthetic method, especially reagents and reaction condition, for the preparation of ether or ester derivative which can be easily vaporized in GC were explained.

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Fire Debris Analysis by GC/MS (GC/MS를 이용한 화재현장증거물의 분석)

  • Han, Dong-Hun
    • Proceedings of the Korea Institute of Fire Science and Engineering Conference
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    • pp.37-40
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    • 2011
  • 화재현장에서는 화재의 원인으로 간주되는 여러 가지 증거물이 발생한다. 이러한 증거물을 분석하기 위한 수단으로 GC/MS의 역할은 아주 크며, 이를 이용한 증거물의 분석에 관한 표준으로 ASTM 1618-10과 전처리법을 소개한다. 또한 전처리법에 따른 여러 가지 종류의 유류의 특성을 알아보고 유류 성분을 포함한 화재증거물의 실제 사례를 들어 보겠다. 아울러 화재현장에서의 가연물로 추정되는 물질에 대하여 열분해를 통한 GC/MS 분석 사례도 제시하여 본다.

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A Study on the Identification of Phenol Production by GC/MS under Chemical Treatment of Industrial Wastewater (화학적 폐수처리 중 GC/MS에 의한 폐놀생성 규명에 관한 연구)

  • 박선구;고오석;신대윤
    • Journal of Environmental Science International
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    • v.9 no.1
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    • pp.89-93
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    • 2000
  • Twenty organic chemical substances(Table 2) were isolated from untreated wastewater, as well as treated wastewater, collected at 76 companys of 9 industry group located in the basin of Youngsan River. Those organic compounds were analyzed by Gas Chromatography/Mass Spectrometry(GC/MS) and confirmed through comparison with each standard reagents. Phenol, which was not detected in the raw wastewater, was identified in the effluent of treatment facility, indicating that phenol is generated from isopropylbenzene of plant wastewater.

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