말라카이트 그린의 색엷음 현상을 이용한 글리세롤의 정량 : 바이오디젤 내 반응물 분석의 적용 가능성
Quantification of Glycerol by Malachite Green Fading Phenomenon : Application in Reaction By-Product of Biodiesel
Nowadays biodiesel (fatty acid methyl ester, FAME) has been becoming an important issue as a desired alternative of energy products because of non-toxic, biodegradable properties, and lower exhaust emissions. During esterification of fatty acids or transesterification of oils and fats with short chain alcohols by the alkali-catalyzed methanolysis, FAME and unrefined glycerol are generated. Quantification of glycerol as a by-product is important because of a determinant of biodiesel quality. However, the glycerol analysis by gas chromatography (GC) method has laborious works with sample preparation, long time and cost of sample analysis. Thus, there is a need to analyze glycerol more simply. Herein we demonstrate that the colorimetric assay for glycerol analysis conducted by UV-vis spectrophotometer at the wavelength 617 nm whose peak is maximum intensity of malachite green, resulting in the red-shift occurred proportionally as a function of glycerol amount. Thus, it is considered the solvent media for malachite green fading for biodiesel production: (1) water, (2) MeOH, and (3) EtOH. The resulting findings show that the peak intensity at 617 nm in glycerol-malachite green mixture had a relationship between glycerol concentration and degree of peak shift as increase in pure glycerol concentration approximately at pH 7.0. However, when it was measured the unrefined glycerol concentration by diluting and adjusting with water to buffer (pH 7.0), it was not observed the absorption peak at 617 nm because of impurities and OH ions. In case of glycerol from biodiesel production factories, glycerol concentration could be successfully measured.
목차
Abstract 1. 서론 2. 실험재료 및 방법 2.1. 재료 및 실험 장치 2.2. Malachite green (MG+)과 glycerol 2.3. 알칼리 촉매에 의한 전이 에스테르화 반응 방법 2.4. KS 시험방법에 의해 FAME 함량 분석 방법 [2,6,7] 2.5. KS 시험방법에 의해 총 glycerol 정량 방법 2.6. 비정제 glycerol 농도 측정 방법 3. 결과 및 고찰 3.1 콩 유지를 이용한 바이오디젤의 생산과 반응분석 3.2. 비정제 glycerol 농도 측정 4. 결론 감사 References
한국생물공학회 [The Korean Society for Biotechnology and Bioengineering]
설립연도
1984
분야
공학>생물공학
소개
이 법인은 생물 공학의 발전과 보급에 이바지하고, 회원 상호 간의 연구 협력과 친목을 도모함을 목적으로 한다
1. 생물공학 분야의 발전을 위한 연구 협력
2. 생물공학의 실용화를 촉진시키기 위한 산학 협동
3. 학술연구 발표회, 강연회, 연수회 등 학술활동의 개최
4. 국,영문 학술지,소식지,학술회의 Proceedings 및 학술도서의 발간
5. 생물공학 발전을 위한 정책 건의
6. 기타 국제 교류 등 본 학회의 목적 달성을 위한 제반 활동