• 자원환경지질
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• 제40권5호
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• pp.699-703
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• 2007

가스크로마토그래피와 동위원소질량분석기를 온라인으로 연결하여 이루어지는 성분별동위원소분석기술은 지구과학, 환경과학 및 법의학 분야에서 안정동위원소 분석의 최신 기술이다. 1990년대부터 GC-IRMS는 법의학 분야에서 식품의 진위감별과 환경과학 분야의 유기오염물질의 오염원 추적에 널리 이용되어 왔다. 국내에서는 한국기초과학지원연구원에 2005년 초에 처음으로 GC-IRMS가 설치되었다. 이 연구에서는 한국기초과학지원연구원에서 운영중인 GC-IRMS를 간단히 소개하고 제조사가 다른 BTEX의 성분별탄소동위원소의 예비분석결과를 소개한다.

• Mass Spectrometry Letters
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• 제2권2호
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• pp.33-36
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• 2011

The misuse of anabolic androgenic steroids is of particular concern in sports and society. Thus, it is of great importance to discriminate endogenous steroids such as testosterone or testosterone prohormones from their chemically identical synthetic copies. In this study, gas chromatography-combustion/isotope ratio mass spectrometric (GC-C/IRMS) method has been developed and validated for discriminating the origin of anabolic androgenic steroids. The method involves the solid-phase extraction, enzymatic hydrolysis with ${\beta}$-glucuronidase, HPLC-fractionation for the cleanup and analysis by GC-C/IRMS. The difference(${\Delta}^{13}C$) of urinary ${\delta}^{13}C$ values between synthetic analogues and endogenous reference compounds (ERC) by GC-C/IRMS was used to elucidate the origin of steroids, and intra- and inter-day precision, specificity and isotope fractionation were evaluated. The present GC-C/IRMS method combined with HPLC cleanup was accurate and reproducible enough to be successfully applied to the test of urine sample from suspected anabolic steroid abusers.

• Journal of Astronomy and Space Sciences
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• 제15권1호
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• pp.163-174
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• 1998

To study the origin of organic matter in meteorite, terrestrial rocks which contain or-ganic compounds similar to the ones found in carbonaceous chondrites are studied and compared with Muchison meteorite. Hydrocarbon molecules were extracted by benzene and methanol from bituminous coal and oil shale and the extracts were partitioned into aliphatic, aromatic, and polar fractions by silica gel column chromatography. Carbon isotopic ratios in each fractions were analysed by GC-C-IRMS. Molec-ular compound identifications were carried by GC-MS Engine. Bituminous coal and oil shale show the organic compound composition similar to that of meteorite. Oil shale has a wide range of ${\delta}^{13}C,-20.1%_0~-54.4%_0$ compared to bituminous coal, $-25.2%_0~34.3%_0$. Delta values of several molecular compounds in two terrestrial samples are different. They show several distinct distributions in isotopic ratios compared to those of meteorite; Murchison meteorite has a range of ${\delta}^13C\;from\;-13%_0\;to\;+30%_0$. These results provide interpretation for the source and the formation condition of each rock, in particular alteration and migration processes of organic matter. Especially, they show an important clue whether some hydrocarbon molecules observed in meteorite are indigenous or not.