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이준배,배정오 ( Joon Bae Lee,Jeong O Bae ) 한국환경농학회 1993 한국환경농학회지 Vol.12 No.3
This reviews investigate to compare acid precipitation that caused by air pollutant. The ecosystem investigated the effect of acid precipitation. The study of foreign acid precipitation and acid precipitation of Korea investigated and injury of acid precipitation is prevented and consider a plan that it is presented.
GC/MS 분석에 의한 4-Octylphenol의 Carboxen 흡착에 대한 열역학적 연구
이준배 ( Joon-bae Lee ),박우용 ( Woo-yong Park ),손성건 ( Shungkun Shon ),정지은 ( Ji Eun Jung ),정용애 ( Yong Ae Jeong ),공보경 ( Bokyoung Gong ),김유나 ( Yu-na Kim ),권오성 ( O-seong Kwon ),팽기정 ( Ki Jung Paeng ) 한국공업화학회 2018 공업화학 Vol.29 No.3
혈액과 같이 다성분으로 이루어진 복잡한 matrix로 구성된 시료에서 휘발성 유기화합물(VOC)이나 반휘발성 유기화합물(SVOC)의 분석은 분리공정을 거쳐 분석되는 것이 일반적이다. 흡착은 어떤 성분이 다른 상의 표면에 축적되는 물리적 현상이다. 전처리 과정에서 번거로움을 극복하기 위해 흡착이 적용되며 이를 위해 다공성 탄소인 carboxen (CAR)이 도포된 solid phase microextraction (SPME) 장치가 흔히 사용된다. 본 연구에서는 플라스틱 제조시 가소제 등으로 사용되는 4-octylphenol의 carboxen에 대한 흡착특성을 살펴보았다. 이를 위해 dichloromethane (CH<sub>2</sub>Cl<sub>2</sub>, DCM), ethylacetate(CH<sub>3</sub>COOC<sub>2</sub>H<sub>5</sub>, EA) 및 diethylether (C<sub>2</sub>H<sub>5</sub>OC<sub>2</sub>H<sub>5</sub>, Et<sub>2</sub>O)에 대한 추출효율과 bistrimethylsilyltrifluoroacetamide (BSTFA), methylchloroformate (MCF) 및 pentafluorobenzylbromide (PFBBr)에 대한 유도체화 반응의 특성을 조사하였다. 열역학적특성 파악을 위한 추출용제로는 DCM이 양호한 효과를 보였으며 BSTFA를 이용한 silylation의 분석특성이 우수하여 이를 적용하였다. 열역학적 및 동력학적 흡착실험 결과 흡착과정은 흡열특성을 보였고 Langmuir식보다는 Freundlich등온식에 더 근접하였으며 동력학적으로는 pseudo-2<sup>nd</sup> order kinetic model에 따르는 것을 보였다. It is common to analyze volatile organic compound (VOC) or semi-VOC (SVOC) in a sample composed of a complex matrix consisting of multiple components such as bloods through a separation process. Adsorption is a physical phenomenon in which certain components accumulate on the surface of other phases. In order to overcome difficulties in the pretreatment process, an adsorption is frequently used. Solid phase microextraction (SPME) equipment with porous carbon carboxen (CAR) is an example of adsorption application. In this study, the adsorption of 4-octylphenol to carboxen was examined. To do so, the extraction efficiency for such solvents as dichloromethane (CH<sub>2</sub>Cl<sub>2</sub>, DCM), ethylacetate (CH<sub>3</sub>COOC<sub>2</sub>H<sub>5</sub>, EA) and diethylether (C<sub>2</sub>H<sub>5</sub>OC<sub>2</sub>H<sub>5</sub>, Et<sub>2</sub>O) was studied and also the derivatization reaction for 4-octylphenol with reagents of bistrimethylsilyltri-fluoroacetamide (BSTFA), methylchloroformate (MCF) and pentafluorobenzylbromide (PFBBr) was compared. The combina-tion of DCM and BSTFA showed good performance thus they were adopted for this study. Thermodynamic adsorption experi-ments showed that the adsorption process was endothermic and Freundlich isotherm equation was more suitable than Langmuir isotherm. It was also found that the adsorption followed a pseudo-2<sup>nd</sup> order kinetic model.
엔진윤활유 중 Ethylene Glycol의 용제추출후 bistrimethylsilyltrifluoroacetamide(BSTFA)를 이용한 GC/MS 분석에 관한 연구
이준배(Joon-Bae Lee),권오성(O-Seong Kwon),유재훈(Jae-Hoon You),손성건(Shungkun Shon),성태명(Tae-Myung Sung),팽기정(Ki-Jung Paeng) 한국트라이볼로지학회 2012 한국트라이볼로지학회지 (Tribol. Lubr.) Vol.28 No.6
For proper functioning, general machines usually need lubricant oil as a cooling, cleaning, and sealing agent at points of mechanical contact. The quality of lubricant oil can deteriorate during operation owing to various causes such as high temperature, combustion products and extraneous impurities. In this study, a heavy load stopped during operation, and the oil was analyzed to check whether any impurities were added. Extraction using acetonitrile followed by reaction with BSTFA(bistrimethylsilyl trifluoroacetamide) showed that, trimethylsilylated ethylene glycol was present in the lubricant oil. To quantify the ethylene glycol in the oil, deuterium-substituted ethylene glycol, which acted as an internal standard, was added to the sample and then extracted with the solvent. Next, the extract was reacted with the derivatizing agent(BSTFA) and then analyzed with GC/MS. The detection limit of this method was found to be 0.5 ㎍/g and the recovery of oil containing 20,000 ㎍/g of ethylene glycol was measured to be 94.8%. A damaged O-ring and eroded cylinder liner were found during the overhaul, which implied the leakage of coolant containing ethylene glycol into the lubricating system. The erosion of the cylinder liner was assumed to be due to cavitation of the coolant in the cooling system.
Nitrox 공기통의 기체 분석에 의한 스쿠버다이버 사망원인 추정에 관한 사례연구
이준배 ( Joon Bae Lee ),유재훈 ( Jae Hoon You ),손성건 ( Shung Kun Shon ),성태명 ( Tae Myung Sung ),팽기정 ( Ki Jung Paeng ) 한국안전학회(구 한국산업안전학회) 2011 한국안전학회지 Vol.26 No.2
Going underwater is supposed to begin with the history of human beings. At first it was confined to relatively shallow level, less than several meters by holding breath. Recently, deep level diving has been necessary for such purpose as construction, maritime salvage, military operations, research and sports by using SCUBA(self-contained underwater breathing apparatus) equipment. As one goes down into water, the pressure on the diver is increased due to water pressure with depth, usually 1atm for each 10m water level. In deep water, mixed gas or nitrox (EAN, enriched air nitrox) could be applied for the divers lest they should get disease due to high pressure. Of these, the former is usually composed of oxygen and inert gas like helium or hydrogen, the latter contains higher oxygen content than that in normal air in which the oxygen concentration is designated by the character “EAN” followed by vol. % of oxygen, for example, “EAN 40” contains 40% of oxygen. In this case, a victim was found at the 39 m below the sea surface breathing air and nitrox in cylinder wrongly marked as EAN 36, which was analyzed to contain 63% of oxygen by GC/TCD. The cause of death could not be exactly related with the oxygen content in the nitrox cylinder, because the accurate depth for the victim to dive was not known, even though the victim was just found at the depth of 39 m. However, the wrongly marked nitrox could be believed to be the main cause of the death at the depth unless there happened any other accident except that during diving.
차량 보수도장 보험사기 규명을 위한 수용성 페인트 성분분석
이준배 ( Joon-bae Lee ),이천호 ( Cheon-ho Lee ),유승진 ( Seung-jin Ryu ),공보경 ( Bokyoung Gong ),권오성 ( O-seong Kwon ),김명덕 ( Myung-duck Kim ),김남이 ( Nam Yee Kim ),팽기정 ( Ki Jung Paeng ) 한국공업화학회 2017 공업화학 Vol.28 No.4
최근 차량 증가와 더불어 이에 따른 사고 또한 증가하고 있는 추세로써 대부분의 사고차량에서 도색작업이 반드시 요구되고 있다. 통상적인 차량 도색시 다량의 유기용제가 사용되어 환경문제가 대두되고 있으며 이에 대처하기 위해 최근 수용성 도료가 국내에서도 개발되고 그 사용이 증가하고 있다. 그러나 수용성 도료의 경우 도장 작업비용이 고가이기에 정비공장에서 보험금 과다청구의 수단으로 악용하는 사례 또한 적지 않다. 본 연구에서는 수용성 도료를 사용하였는지 여부를 규명하기 위해 수용성 도료에 사용되는 비이온성 계면활성제 성분인 Surfynol 104 성분을 지표물질로 하여 퀴리포인트를 이용한 열분해-기체크로마토그래피/질량분석법(Py-GC/MS)으로 분석하였다. 분석결과 도색작업이 완료된 실제 차량 페인트에서 동위원소 치환된 fluoranthene-d10을 내부표준물질로 하여 표준물첨가법(standard addition method)으로 약 0.38%의 계면활성제 성분이 검출되었다. With increasing the number of vehicles, the accident rate also goes up and the damaged vehicles should be painted as a final repair process. At the painting stage the solvent-based paint causes environmental problems. To overcome these problems waterborne refinish paint is frequently used recently. However, for waterborne refinish, the costs of insurance coverage are too expensive, and insurance reimbursement costs could be burdensome. Because of the high price of aquatic paint treatment, the service shop might charge the malicious service price. In this study, the surfactant of Surfynol 104, which is the component in the paint, was used as an indicator whether the vehicle was painted with waterborne paint. The specimen was quantitatively analyzed to contain 0.38% of the surfactant through the standard addition method with isotope substituted internal standard (IS) of fluranthene-d10 by curie point pyrolysis-gas chromatography/mass spectrometry (Py-GC/MS).