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朴冕用 건국대학교 1986 學術誌 Vol.30 No.2
The Stachyose from seeds were determined by both methods of gas-liquid chromatography (G. C) and liquid-liquid chromatography (L. C) and compared their determining processes. G.C method was taken much time and had to process through multisteps to inject the sample solutions into the instrument, but this method had the advantage which many sugar components with stachyose could be determine at the same time. L.C method was much easier than G.C because the method did not be necessary any preliminary treatment. On the other hand, this method was not able to determine many sugar components with stachyose at the same time. The best conditions for the determination of stachyose by L.C. were that the eluent is the mixed solution of acetonitrile - 2.5 × 10-4M KH2PO solution (70 : 30) adjusted to pH 5,0 with KOH solution and Partisil-10 PAC silica gel.
朴冕用,朴澤奎 건국대학교 1988 學術誌 Vol.32 No.2
The pure metals of copper and iron (99.99% up) were mixed to molar ratios of 0.6 : 2.4, 0.8 : 2.2, 1.0 : 2.0, 1.2 : 1.8, and 1.4 : 1.6. These mixtures were pressed to make disc form and heated at 900, 1000, 1100 and 2614∼2700℃. In the mixture Cu0.8Fe2.2O4.08 compound heated at 1100℃ was shown the sensitive response to many ions without any selectivity. Cu0.6Fe2.4O5.81 compound heated at 2614∼2700℃ was shown non-nernstian slope (67.5) to silver(I), but this electrode was responsed linearly to silver(10-6mole/L), sulfide(10-7mole/L) and phosphate (10-6mole/L). And also this electrode was able to use for detection of phosphate ion which was dissociated from ATP by enzyme.
박면용 建國大學校基礎科學硏究所 1990 理學論集 Vol.15 No.-
Perchlorate ion is responded selectively to magnesium ferrite electrode which were made from mixture of magnesium oxide and ferric oxide and were quenched in air after sintering at 2614∼2700℃. This electrode is maintained constant potential between pH 4.0 and 10.0 The cations of Zn(Ⅱ), Cu(Ⅱ) and Cr(Ⅲ)are also responded to this electrode, but those ions are not interfered to determine perchlorate ion because those ions are shown positive potential.
양이온 교환수지에 의한 구리의 지금 및 합금의 분리정량
박면용,이병조 건국대학교 1971 學術誌 Vol.12 No.1
The mixed sample containing 0.1 m.mole of following metals, Fe(III), Bi(III), Cu(II), Pb (II), Zn (II), and Ag (I), are separated into its components with the exception of Fe (III) and Bi(III), through cation exchange resin, Dowex 50w×8(100∼200mesh), 10cm column, with the mixed solution of HAc and NaAc as the eluent. The recoveries of cations eluted, are more than 99%. The elution curves of Fe (III) and Bi (III) overlap each other and are difficult to separate. The determination of Fe (III) and Bi (III) in this effluents, however, can be carried out without any interference by sepectrophotometry. For a sample containing large quantity of copper, a longer column has to be used for separation, that is, 30cm column are used for the impurities of Fe (III), Bi (III), Pb (II), Zn (II) and Ag(I), in copper metal, and 20cm column for the components of Cu(II), Pb(II), Zn (II) and Sn (IV) in bronze alloy.