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파인 세라믹의 분석을 위한 알칼리 용융법과 고압 산분해법의 비교 및 응용
임흥빈,한정란,이계호,이광우,유택아명,Im, Heung Bin,Han, Jeong Ran,Lee, Gye Ho,Lee, Gwang U,Yu, Taek A Myeong 대한화학회 1994 대한화학회지 Vol.38 No.6
난용성 신소재 중의 하나인 파인 세라믹의 분석을 위하여, 알칼리 용융법과 고압 산분해법 등의 시료 전처리법을 유도결합원자발광분석기(ICP-AES)를 이용하여 연구하였다. Al2O3 분말을 분석하여 본 결과, 고압 산분해법이 알칼리 용융법보다 재현성 있는 측정치를 얻을 수 있었다. SiC분말의 경우에서는 고압산분해법으로 처리한 후 Si매트릭스를 Si-F형태로 증발시켜서 분석하여 본 결과 분말 중의 ppm 농도 범위의 불순물들이 매트릭스에 의한 간섭없이 분석되었다. 일본 인증기준물인 JCRM022, JCRM023 초미립 분말을 고압 산분해법으로 분석하여 본 결과, 좋은 재현성과 높은 정확성을 나타내었다. For the analysis of fine ceramics, which is one of the new materials difficult to be dissolved, the methods of sample pretreatments such as alkali fusion and high pressure acid digestion were studied using inductively coupled plasma-atomic emission spectrometer(ICP-AES). For the Al2O3 powder sample, the results from high pressure acid digestion method showed better reproducibility than those obtained by alkali fusion technique. In the case of the analysis of SiC powder using the former method, impurities of the powder in the range of ppm were determined without matrix interference by removing Si as Si-F volatilization. Japan Certified Reference Materials (JCRM022 and JCRM023) were analyzed by this method for ultra fine powder and the results showed high accuracy and good reproducibility.
임흥빈,강영국,문자영,손형옥,이영구,이동욱 한국연초학회 1998 한국연초학회지 Vol.20 No.2
Long-term exposure of cigarette smoke or air pollutants to human can induce damages in the airway mucociliary function and can be closely related to the irritation and sputum formation in the respiratory system. This study was undertaken to investigate whether rat trachea can be used as a tool for evaluating the cigarette smoke quality. It was identified that, through the examination with inverted microscope, ciliary beating in 1 mm long cut of nat trachea ring was continued for at least 48 hours in saline solution at $25^{\circ}C$. The ciliostasis time in a KCN solution as a positive control was decreased with increasing the concentration of KCN. There were no significant differences in the ciliostasis time by body weight and individual variation of rats. Ciliotoxicity of whole smoke trapped in saline was not significantly changed by aging for more than 6 hrs. The ciliostasis time was in inverse proportion to the number of sample cigarettes applied. As moisture in the cigarette was increased, ciliostasis time was linearly increased. Therefore, these data indicate that the ciliotoxicity test using rat trachea in vitro can be applied to evaluate the cigarette smoke quality and to search factors for the irritation and sputum formation by cigarette smoke as well as air pollutants.