• 제목/요약/키워드: Gas Chromatography/mass spectrometry

검색결과 978건 처리시간 0.034초

Determination of Organophosphorous Pesticides in Suncheon Bay (순천만 유기인제제 농약의 측정)

  • JEON, DEOK SAN;YANG, JAE SAM
    • 한국해양학회지
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    • 제25권1호
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    • pp.21-25
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    • 1990
  • Eleven water samples were analyzed for organophosphorous pesticides in Suncheon Bay with Gas Chromatography Mass Spectrometry. For the first time in Korea, Kitazin-P was found in marine environment and the concentrations ranged upto 2.2mg/l. The regional and temporal variations of the pesticide were also studied.

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The Global Volatile Signature of Veal via Solid-phase Microextraction and Gas Chromatography-mass Spectrometry

  • Wei, Jinmei;Wan, Kun;Luo, Yuzhu;Zhang, Li
    • Food Science of Animal Resources
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    • 제34권5호
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    • pp.700-708
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    • 2014
  • The volatile composition of veal has yet to be reported and is one of the important factors determining meat character and quality. To identify the most important aroma compounds in veal from Holstein bull calves fed one of three diets, samples were subjected to solid-phase microextraction (SPME) combined with gas chromatography-quadrupole mass spectrometry (GC-MS). Most of the important odorants were aldehydes and alcohols. For group A (veal calves fed entirely on milk for 90 d before slaughter), the most abundant compound class was the aldehydes (52.231%), while that was alcohols (26.260%) in group C (veal calves fed starter diet for at least 60 d before slaughter). In both classes the absolute percentages of the volatile compounds in veal were different indicating that the veal diet significantly (p<0.05) affected headspace volatile composition in veal as determined by principal component analysis (PCA). Twenty three volatile compounds showed significance by using a partial least-squared discriminate analysis (PLS-DA) (VIP>1). The establishment of the global volatile signature of veal may be a useful tool to define the beef diet that improves the organoleptic characteristics of the meat and consequently impacts both its taste and economic value.

Preserving Reliability of Evidence Containers for Fire Debris Containing Ignitable Liquids (유류화재증거물 보관용기의 신뢰성에 관한 연구)

  • Han, Dong-Hun;Lee, Sung-Ryong
    • Fire Science and Engineering
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    • 제27권2호
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    • pp.70-74
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    • 2013
  • It is very important for the collected samples at fire scenes to be properly preserved for laboratory analysis. Preserving abilities of four type containers, metal cans, glass jars, zipper and heat sealed polymer bags, with the five ignitable liquids (toluene, n-octane, o-xylene, n-decane and n-hexadecane) were examined with gas chromatography-mass spectrometry. The glass jars with Teflon (PTFE) liner were the best ability to prevent the evaporation of the ignitable liquids.