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양이온교환수지에 의한 알칼리 토금속 및 합금의 분리정량
박면용,이병조,박기채,Myon-Yong Park,Byong Cho Lee,Kee Chae Park 대한화학회 1971 대한화학회지 Vol.15 No.2
The various eluents have been used for the separations of alkaline earth metals by elutions through cation exchange resin column by many investigators. We find, the mixed solution of 1M HAc and 1M NaAc (pH 4.75) is the best eluent for this purpose, becouse the one step elution through 7cm Dowex 50w${\times}$8(100~200mesh) resin column with this eluent, gives the quantitative separation. When 2M NaAc is used as a eluent Sr(II) and Ba(II) is separated easily without any contamination of Mg(II) andCa(II). The Ca-Pb alloy which is composed of Cu, Ca, Sr, Ba and abundance of Pb metal is separated quantitatively into its components by the two step elution with 0.3M HAc + 0.3M NaAc(PH 4.75) and 0.5M HAc + 0.5M NaAc(PH 4.75) as eluents through 10cm resin column.
박면용,노성린,Park, Myon-Yong,Nho, Sung-Lin 대한화학회 1968 대한화학회지 Vol.12 No.4
液狀이온交換體 Amberite LAI을 chloroform에 10%로 묽혀서 鹽酸算性에서 Bi(III), As(III), Sb(III), Zn(II) 및 Fe(III)의 推出率을 試驗한 結果, Zn(II)는 2M에서 98%. As(III)는 7~14M에서 Sb(III)는 2~4M에서 , Fe(III)는 6~10M에서 蒼鉛과 定量的으로 分離되었다. 그리고 chloroform을 溶媒로 썼을 때는 xylene이나 hexane을 溶媒로 썼을때보다 더 急傾斜를 이루는 推出率曲線을 나타냈다. 各各의 不純物을 分離後 Zn(II)는 dithizone. As(III)는 Gutzeit method, Sb(III)는 brilliant green, Fe(III)는 thiocyanate에 依한 比色方法으로 定量하였다. The extraction curve of metal ions with Amberite LAl-chloroform has been found to be more steeper than with Amberite LAl-xylene or hexane, and the extraction ratio of Zn (II) in 2M HCl solution is 98%. The extraction ratio of As (III) in 9~11M HCl soln., Sb (III) in 2~4M HCl soln., and Fe (III) in 6~10M HCl soln. are 100%. The separated elements from Bi metal were determined by colorimetry, Zn (III) with dithizone, As (III) with Gutzeit method, Sb (III) with brilliant green and Fe (III) with thiocyanate.
박면용,Park, Myon-Yong 대한화학회 1968 대한화학회지 Vol.12 No.2
Dowex $1{\times}4$ 陰이온 交煥樹指를 二段階(높이:下段 22cm, 上段 3cm, 直經 1.5cm)로 充塡하여 비스머스 金屬中에 들어있는 不純物인 Pb(II), Ag(I), Cu(II)를 7.5M 鹽酸으로, 그리고 Zn(II), Fe(III)를 0.5M 鹽酸으로 分離하고 上段에 남아있는 Te(IV)은 2M NaOH 용액으로 容出하고 아직도 上段에 남아있는 Au(III)는 樹脂를 태워서 分離하였다. 또 한가지 方法은 같은 樹脂를 10cm 높이로 一段階의 管에 充塡하여 0.5M 鹽酸으로 Pb(II), Ag(I), Cu(II), Fe(III), Zn(II)를 함께 容出하여 비스머스 中에서 分離하였다. 分離된 모든 不純物은 比色法으로 定量하였다. Two methods for separation of the impurities from bismuth metal have been found by the use of Dowex $1{\times}4,$ anion exchange resins. The first method is that Dowex $1{\times}4$ resins are packed into the two stage columns (height of under stage is 22cm and upper stage is 3cm, and diameter of columns are 1.5cm), and the impurities of Pb(II), Ag(I) and Cu(II) are separated by the eluent of 7.5M HCl soln, Zn(II), Fe(III) by 0.5M HCl solns, and Te(IV) in the upper stage by 2M NaOH soln. Remained Au(III) in the upper stage is determined by the ignition with resins. The 2nd method is that for the separation of all the impurities simultaneously the same resins are packed into single stage column(height is 10cm and diameter is 1.5cm), and all the impurities of Pb(II), Zn(II), Cu(II), Fe(III) and Ag(I) are eluted by the eluent of 0.5M HCl soln. Separated impurities are determined by the colorimetry.
박면용 ( Myon Yong Park ) 건국대학교 기초과학연구소 1991 理學論集 Vol.16 No.-
Ion-selective electrode made from titanium dioxide have been studied for development of metal-titanium dioxide system electrode. The titanium dioxide selectrode sintered at 2,614~2,700℃ was responded selectively to silver(10(-5)M), phosphate(10(-5)M) and monohydrogen phosphate (10(-4)M) in aqueous solution. According to experimental results metal-titanium oxide compounds were expected to be usable for materials of ion-selective electrode.
박면용 ( Myon Yong Park ) 건국대학교 기초과학연구소 1980 理學論集 Vol.6 No.-
Chlorophyll a와 b를 시금치 잎사귀의 추출물에서 두 가지 방법으로 분리하였다. 첫째 방법은 Chlorophyll 추출물에서 유기용매를 사용하여 Carotene, pheophytin 등을 제거한 다음 설탕이 채워진 크로마토그래프관에 통과시켜 Chlorophyll a와 b를 분리하였다. 둘째 방법은 무수의 iso-octane으로 a를 녹여내어 분리함으로써 b를 얻는 방법인데 미량의 b만을 얻을 수 있었다. Pure chlorophyll a and b components were separated from the extracts of Spinach leaves by two methods. The first procedure was the separation of carotene, pheophytin, etc. from crude extracts of chlorophylls by decantation of organic solvents and then passed the purified chlorophyll through a sugar column to get the pure chlorophyll a and b. The second method was the selective separation of chlorophyll a from b by solvent extraction of dehydrated iso-octane. However this method was yielded only micro-amount of cholorophyll b from a.
박면용 ( Myon Yong Park ) 건국대학교 기초과학연구소 1983 理學論集 Vol.8 No.-
When the absorbances of chlorophyll-b (3.9×10(-6)/M) in nucleophilic diethyl ether plotted to the concentration of n-propyl alcohol which were added to the chlorophyll-b solution, the plotted curves have been shown the maximum value at 0.04M of n-propyl alcohol. The formation of oligomers and monomers have been identified by this evidence on the curve but it were not appeared on the curve of fluorescence mission and fluorescence excitation. The stokes shifts have been shown the bathochromic effect and π→π* transition on the absorbance and fluorescence excitation of the solution when n-propyl alcohol were added to chlorophyll-b in diethyl ether and benzene for the increasing of the solution polarity. The calibration curves of chlorophyll-b concentration to absorbance and fluorescence intensity have also shown the evidence of oligomers in more concentrated range than 10(-6)M and monomers in more diluted range than 10(-6)M.
박면용 ( Myon Yong Park ),이명재 ( Myung Jae Lee ),조동회 ( Dong Hoe Cho ),원층택 ( Chung Taik Won ) 건국대학교 기초과학연구소 1992 理學論集 Vol.17 No.-
The ion-selective electrode based on ferric oxide and calcium ferrite have been studied to ionic sensitivities, selectivities and response behaviors in aqueous solution. The membrane selectrode of ferric oxide was prepared by using a-ferric hydroxide from ferric nitrate solution at pH 4.5~6.0. The membrane were sintered at 1,200℃ and 1,350℃. Calcium ferrite was prepared by mixing ferric oxide with calcium oxide on molar ratio of 0.8: 0.2 and the selectrode membrane based on calcium ferrite was sintered at 1,100℃. Membrane seletrode of ferric oxide was responded without any selectivity to Ag+, Ni2+, Ca2+, Bi3+, Ci-, HCO3-, CIO4,- and NO3-ion. Membrane seletrode of calcium ferrite responded except sensitivity to Ag+, Be2+, Cu2+, Cr3+, Bi3+, HCO3-, CO32-, and S2-, but their sensitivities were agreed with Nernstain slope. The selectrode of calcium ferrite was shown reproducible potential response to ions in the solution for six months.