• 분석과학
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• 제16권6호
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• pp.438-442
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• 2003

본 연구에서는 우리나라에서 시판되고 있는 국내 및 외제 와인에 대하여 vinclozolin, dichlofluanid, penconazole, procymidone 등의 살균제 잔류함량을 고체상 추출법을 이용한 GC/MS-SIM 방법으로 정량 하였다. 분석결과 모든 시료에서 procymidone의 함량이 $2.2-76.1{\mu}g/L$가 검출되었고, 회수율은 81.3-93.1 %, 표준편차는 1.4-3.4 %로 나타났다.

• 한국식품위생안전성학회지
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• 제10권4호
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• pp.239-247
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• 1995

Analytical method for saccharin in foods was developed using gas chromatography/mass spectrometry(GC/MS). Methylation with diazomethane, acetylation with MBTFA, and silylation with MSTFA and MTBSTFA were compared. Methylation of saccharin produced N-methylated saccharin as the major product and O-methylated saccharin as the minor one. Silylation of saccharin with MSTFA and MTBSTFA reasulted in the formation of the correponding O-silylated products, respectively. The derivatization of saccharin was optimized with MSTFA. The ions at m/z 240, 255, and 166 were monitored to characterize saccharin.

• 한국식품영양과학회지
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• 제24권3호
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• pp.459-465
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• 1995

The ether extract of Salviae miltiorrhizae Radix(SMR) was fractioned to give five subfractions, so that two subfractions of them were recrystallized to yield each pure diterpene quinone pigment. On the basis of spectral evidence, these two compounds were identified as tanshinone II and crytotanshinone. Cryptotanshinone exhibited both of a potent platelet anti-aggregating activity in vitro and a potent antimicrobial activity. GC-MS analysis of the other extract showed that tanshinone II was contained in the largest proportion of all the diterpene quinones. In addition, GC-MS analysis gave other valuable analytical informations.

• Mass Spectrometry Letters
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• 제11권4호
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• pp.103-107
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• 2020

We report the application of 2,4,6-trichlorobenzoyl chloride (often referred to as Yamaguchi esterification reagent) for the selective derivatization of the carboxylic group for GC-MS with the sample preparation method optimized for GC-MS analysis. The reagent was shown to be capable of selectively turning the carboxylic group into a reaction center, i.e., anhydride, of which the further reaction was directed to a near complete formation of required esters by unique steric and electronic effects of the reagent. Using the developed method, the chiral separation of hydroxycarboxylic acids by GC-MS using non-chiral columns was successfully demonstrated.

• Mass Spectrometry Letters
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• 제11권4호
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• pp.95-102
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• 2020

In this study, we provide full descriptions of how to make a low-cost and completely open-source laboratory-made air sampler that will be used for sample adsorption for thermal desorption-gas chromatography mass spectrometry (TD-GC/MS) analysis. It is well known that harmful gases cause bad effects on human bodies, so it is necessary to identify the types and amounts of gases in industrial sites. One of the most commonly used methods for gas sampling is to utilize a sorbent tube using an air sampler. Commercially available air samplers are expensive, typically priced between $1,000 and $2,000, and their design often cannot be modified to fit the experiment. To address these shortcomings, we have developed a do-it-yourself (DIY) air sampler that is not only cheap enough, but also completely open-source. Furthermore, the performance of the fabricated air sampler was validated in conjunction with TD-GC/MS for the analysis of volatile compounds.

• 분석과학
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• 제23권4호
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• pp.414-422
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• 2010

의문문서의 감정영역에서는 잉크 구성성분의 조성 특성의 비교와 분류를 통하여 식별이 이루어진다. 잉크 분석은 TLC, HPLC/MS, GC/MS, LDI/MS를 이용한 조성분석으로 문서위 기재된 잉크의 조성과 변화에 근거하여 개별 특이성을 확인한다. 본 실험은 잉크 조성 특성 중 휘발성 성분을 확인하고자 5개국에서 생산된 검은색 볼펜잉크 56종을 수집하고 HS-SPME GC/MS를 이용하여 ethylbenzene $0.089\sim0.244\;{\mu}g$/mL, o-xylene $0.072\sim0.331\;{\mu}g$/mL, m,p-xylene $0.062\sim0.318\;{\mu}g$/mL, benzene $0.003\sim0.173\;{\mu}g$/mL, 1,1-dichloroethylene $0.003\sim0.295\;{\mu}g$/mL, toluene $0.007\sim0.484\;{\mu}g$/mL와 같은 휘발성 성분특성 자료를 확보하였으며 잉크시료 개체 특이성과 군집성을 바탕으로 식별자료로 활용할 수 있슴을 알 수 있었다.

• 한국대기환경학회:학술대회논문집
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• 한국대기환경학회 2005년도 추계학술대회 논문집
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• pp.405-406
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• 2005

• 한국대기환경학회:학술대회논문집
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• 한국대기환경학회 2008년도 추계학술대회 논문집
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• pp.114-115
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• 2008

• 한국환경독성학회:학술대회논문집
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• 한국환경독성학회 2004년도 춘계학술대회
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• pp.73-73
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• 2004

• 대한화장품학회지
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• 제47권4호
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• pp.317-331
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• 2021

에센셜 오일(essential oil)은 1 개의 단일 식물형 및 식물종이 만들어낸 향이 나는 식물 재료를 물리적인 방법으로 얻어낸 휘발성 물질로 방부, 살균, 항균 효과가 뛰어나 화장품, 향료, 아로마 테라피 치료 등의 목적으로 폭 넓게 사용되고 있다. 에센셜오일은 추출 및 농축과정을 거치게 되는데 이때 재배 과정 중 살포된 농약 또한 추출 및 농축이 됨으로써 인체에 유해할 수 있다. 본 연구에서는 에센셜 오일 중 320 종의 잔류농약을 분석하기 위하여 LC-MS/MS와 GC-MS/MS를 이용하였으며 기존의 정제과정인 hexane 대신 freezing 과정을 이용하여 전처리방법을 개선하였다. 에센셜 오일을 분석한 결과 기준치가 설정되어 있지 않은 chlorpyrifos, piperonyl butoxide, silafluofen 성분이 basil oil 및 clove leaf oil에서 검출되었다. 따라서 에센셜 오일에 대한 잔류농약 모니터링이 지속적으로 필요할 것으로 판단된다.