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김종혁,이석근,Kim, Chong-Hyeak,Lee, Sueg-Geun The Korean Society of Analytical Science 2002 분석과학 Vol.15 No.3
The layer structure of the title compound, $[Ni(en)_2(H_2O)_2](CH_3C_6H_4SO_3)_2(H_2O)$ (en = ethylenediamine), consists of discrete cations, anions, and solvate water molecules linked by a hydrogen bonding network. The central Ni atom of the cation layer has a slightly distorted octahedral coordination geometry with the ethylenediamine ligands functioning as a N,N'-bidentate and the water ligands bonding through oxygen in a trans arrangement. The p-toluenesulfonate of the anion layer has an alternate sulfonate group directed toward opposite side of the cation layer. This layer structure is stabilized by a hydrogen bond involving the O atoms of the sulfonate, the water ligand, solvate water molecule, and the N atoms of the ethylenediamine.
활성알루미나를 이용하여 방사성 폐수 중 I<sup>-</sup>와 IO<sub>3</sub><sup>-</sup>를 제거하는 방법
임헌성,이석근,Lim, Heon-Sung,Lee, Sueg-Geun 한국분석과학회 2009 분석과학 Vol.22 No.6
$^{129}I$ is especially one of the most harmful radioactive elements because of its long half-life ($t_{1/2}$=$1.7{\times}10^7$ yr). The efficient removal of iodide ($I^-$) and iodate (${IO_3}^-$) in a aqueous solution by adsorption using activated alumina and activated carbon was studied. The removal efficiency was over 99% for iodide ion with silver treated basic alumina and iodate ion with acidic alumina or silver treated acidic alumina without any chemical addition or physical treatments.
p-Toluenesulfonate를 가진 새로운 코발트(II) 층상 화합물의 합성과 구조 분석
김종혁,이석근,Kim, Chong-Hyeak,Lee, Sueg-Geun 한국분석과학회 2000 분석과학 Vol.13 No.4
The title compound, $[Co(H_2O)_6](CH_3C_6H_4SO_3)_2$, has been prepared and characterized by X-ray crystallography. The crystal structure of the compound demonstrates a layered material constituted by hexaaquacobalt (II) cations and p-toluenesulfonate anions. Geometrical environment of the cobalt atom is octahedrally coordinated by water molecules. The p-toluenesulfonate anions are arranged with the sulfonate groups turned toward opposite side of the layer, alternately. The layered structure is stabilized by the hydrogen bondings between the ligated water molecules and the anionic sulfonate oxygen atoms.
수질 시료 중의 Pesticide Priority Pollutants 동시분석에 관한 연구
김계영,김종혁,이석근,Kim Kye-Young,Kim Chong-Hyeak,Lee Sueg-Geun 대한화학회 1993 대한화학회지 Vol.37 No.6
미국의 환경청이 지정한 129종의 priority pollutants 중 16종의 유기살충제를 대상물질로 선정하여 수질시료 중의 극미량 분석방법을 연구하였다. 분석방법으로는 기체크로마토그래프-전자포획 및 기체크로마토그래프/질량분석기-SIM(selected ion moitoring)법을 검출방법으로 정하고, 시료용액의 추출 및 농축방법으로는 용매추출법(liquid-liquid extraction)과 고체상 추출법(solid-phase extraction)을 비교 연구하였다. 각 화합물들의 회수율, 상대표준편차 및 검출한계 등을 측정하여 EPA 분석법을 대체할 수 있는지의 가능성을 조사하였다. The simultaneous analysis of samples, 16 organic pesticides in water among 129 priority pollutants listed by EPA, was performed by GC-ECD (electron capture detector) and GC/MS-SIM (selected ion monitoring). Two extraction procedures, liquid-liquid extraction (LLE) and solid-phase extraction (SPE), were studied as an extraction and concentration method. Accuracy and precision of the methods were measured by the calculation of mean recovery and mean relative standard deviation. Finally, the detection limits, the experimental limitations, and prospects were discussed.
HG-ICP-AES법에 의한 Tin 분석시 플루오르화 이온의 영향에 대한 연구
임헌성,조성일,이석근,Lim, Heon-Sung,Cho, Sung-Il,Lee, Sueg-Geun 한국분석과학회 2001 분석과학 Vol.14 No.5
수소화물 발생 유도결합 플라스마 원자 방출 분광법으로 주석을 분석할 때 연속 흐름 수소화물 발생 장치에 사용되는 환원제 및 산의 농도에 대하여 최적조건을 확립하였다. 시료에 함유되어 있는 플루오르화 이온이 주석의 수소화물 발생을 방해하는 영향과 이러한 영향을 최소화하기 위한 여러 가지 예비환원제를 비교 실험하였다. 환원제 및 안정제의 농도가 $NaBH_4$ 1~2%/NaOH 1.0 M인 조건에서 우수한 수소화물을 발생시키는 산농도는 0.5~1.0 M 이었으며, 또한 플루오르화 이온의 방해영향이 매우 크게 관찰되었지만 boric acid 및 L-cysteine의 혼합용액은 이런 영향을 최소화하여 가장 효과적인 주석의 수소화물 발생 보조제로 확인되었다. 플루오르화 이온이 함유되어 있는 용액에서 미량의 주석을 분석하여 회수율이 100~108 %의 결과를 얻었다. The optimization of the reductant and acid concentration for stannane($SnH_4$) generation was investigated by using a continuous flow hydride generator combined with an inductively coupled plasma-atomic emission spectrometer. Several different prereductants were studied to remove the interfering effect of fluoride ion on the hydride generating of tin. The optimum acid concentration was 0.5-1.0 M for the 1-2% $NaBH_4$ and 1.0 M NaOH and the interfering effect of fluoride ion was minimized using boric acid and L-cysteine mixed solution as a prereductant. The reconveries of tin at 20 ng/mL level in the solution containing fluoride ion were 100~108 %.