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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Analytical Science and Technology
Journal Basic Information
Journal DOI :
The Korean Society of Analytical Science
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Volume & Issues
Volume 14, Issue 6 - 00 2001
Volume 14, Issue 5 - 00 2001
Volume 14, Issue 4 - 00 2001
Volume 14, Issue 3 - 00 2001
Volume 14, Issue 2 - 00 2001
Volume 14, Issue 1 - 00 2001
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Synthesis and Analysis of 6,6-dichlorobicyclo[3, 1, 0]hexane-3-carboxylic acid
Lee, Kwang-Soo ; Yang, Jae-Kun ;
Analytical Science and Technology, volume 14, issue 1, 2001, Pages 1~7
6,6-Dichlorobicyclo[3, 1, 0]hexane-3carboxylic acid was synthesized by dichlorocarbene addition into 3-cyclopentenecarboxylic acid using BTEA.Cl as phase transfer catalyst.
NMR data analyst showed that this compound had boat-like conformation and carboxyl group existed as trans form.
Studies on the Separation and Concentration Method of
in the Environmental Samples
Won, Mi Sook ; Cho, Kyu Bong ; Yoon, Jang Hee ; Lee, Dae Won ; Shim, Yoon Bo ;
Analytical Science and Technology, volume 14, issue 1, 2001, Pages 8~14
New process to determine
in the environmental samples was established by investigating the existing methods. The environmental samples included soil, milk, seaweed, fishes and clams, pine needles, and marine sediment. Using the developed method combined with fuming nitric acid and ion exchange resin, which could be reduced the treatment step, we could be removed Ca effectively for the determination of
. The recovery yield of
in this method was 10% higher than those of using the fuming nitric acid only. This method could be applied to all environmental samples we choose. The content of
in soil was the highest value in the tested environmental samples.
Study on the Photocatalytic Efficiencies of
Lee, J.H. ; Oh, H.J. ; Jang, J.M. ; Chi, C.S. ;
Analytical Science and Technology, volume 14, issue 1, 2001, Pages 15~20
films were prepared by anodic oxidation at 180 V and their structural difference caused by oxidation conditions was studies. The microstructure of
solution was mixed type of rutile and anatase. However, the
layer formed in
mixture was mostly anatase type. All
films prepared by anodic oxidation exhibited photocatalytic properties. The photocatalytic degradation of aniline blue was first order reaction with similar rate constants at all oxidative conditions examined in this work.
Study on the Analytical Performance of Double Membrane Desolvator(DMD) with Perfluoroalkoxy(PFA) and Microconcentric Nebulizer(MCN) in Inductively Coupled Plasma Atomic Emission Spectrometry
Sul, Choon-Kuen ; Lim, H.B. ;
Analytical Science and Technology, volume 14, issue 1, 2001, Pages 21~27
In this work, analytical performance of a laboratory built double membrane desolvator (DMD) was studies using perfluoroalkoxy (PFA) nebulizer and microconcentirc nebulizer (MCN) in inductively coupled plasma atomic emission spectrometry. Compared with MCN, PFA nebulizer coupled to DMD showed similar analytical sensitivity for aqueous solution and better sensitivity for isopropyl alcohol. Since PFA resisted various acids, HCI,
and HF solution were analyzed with less than 2% RSD. Rinse-out time for the signal reduction to 1% was obtained to be 35 s for PFA but about 45 s for MCN.
Separation of Plutonium Oxidation States by Ion Chromatography
Kim, Seung Soo ; Jun, Kwan Sik ; Kang, Chul Hyung ;
Analytical Science and Technology, volume 14, issue 1, 2001, Pages 28~33
The ion chromatography for the separation of plutonium species which are suggested to be
in natural water was studied. Two separation methods were performed; 1) two-column method containing each of
cation exchanger, 2) IC with AG11 column and the eluent of oxalate/nitric acid. Separation conditions for
in place of plutonium species were acquired from preliminary tests. When these conditions were applied to separate the plutonium species, two-column method was separated them successfully. However, the IC method with oxalate eluent was difficult in the separation of plutonium species due to the change of
Investigation of Acids on the Germanium Analysis by HG-ICP-AES
Lim, Hyuneui ; Lee, Yeunhee ; Kim, Sun-Tae ; Kim, Young-Sang ; Kim, Kang-Jin ;
Analytical Science and Technology, volume 14, issue 1, 2001, Pages 34~43
The present work is aimed to evaluate the conditions of the hydride generation (HG) for germanium analysis by inductively coupled plasma (ICP)-atomic emission spectrometry (AES). Twelve different kinds of acids were used such as phosphoric, hydrochloric, nitric, sulfuric, perchloric, boric, tartaric, malic, oxalic, tannic, citric, and acetic acid. It was found that phosphoric acid yielded the maximum efficiency of hydride generation. Also, efficient hydride generation was obtined with the buffer solutions containing phosphate ions over a wide range of pH. In addition, in the presence of phosphoric acid the interference caused by metals was suppressed in the hydride generation of germanium. As the concentrations of a reducing agent and a stabilizing increased the hydride generation efficiency and the acid concentration proviaing the maximum intensity were increased. By using an analytical method developed in this study, the contents of germanium in water and rock samples were determined. The detection limit of germanium in the presence of phosphoric acid was
Determination of Plasticizers included in Balloon by Solid Phase Microextraction and Gas Chromatography with Mass Spectrometric Detection
Park, Hyun-Mee ; Kim, Ji-Hyun ; Ryu, Jae-Chun ; Kim, Young-Man ; Lee, Kang-Bong ;
Analytical Science and Technology, volume 14, issue 1, 2001, Pages 44~49
Solid-phase microextraction (SPME) with
polyacrylate fiber, coupled to gas chromatography-mass spectrometry was used to analyze the plasticizers contained in balloon samples. The balloons were identified to be made of polyisoprene by IR spectroscopy. The plasticizers extracted from the balloon samples soaked in acetone-added water solvent for an hour were quantified by external standard method using nine kinds of plasticizers. The quantification method was validated for standard plasticizers in the range of
. The detection limits were
for different plasticizers. The RSDs for the reproducibility of this quantitation method were 3.7-14.2%. A few of balloons included risky level of plasticizer concerned as and endocrine disrupter, and it is necessary to regulate these products.
Grain Structure Analysis in Rolled 1050 Al Alloy Sheets Using EBSD
Han, Jun-Hyun ; Shin, Myung-Chul ;
Analytical Science and Technology, volume 14, issue 1, 2001, Pages 50~58
The effect of cryogenic heavy rolling method on grain refinement has been studied and compared with those obtained by previous methods of cryogenic rolling and heavy rolling developed separately. Both grain structure and grain size were analyzed using electron back scattered diffraction (EBSD), which can distinguish grains each other by means of crystallographic misorientations between them. The cryogenic rolling and heavy rolling exhibit reduction in grain size of 39% and 87%, respectively, and the cryogenic heavy rolling shows reduced grain size similar to that observed in the heavy rolling. The heavy rolling was proved more effective in grain size refinement than the cryogenic rolling.
Determination of Mefenamic Acid with Fe(II)-Dipyridyl-Mefenamic Acid Ternary Complex as Ion-exchagner
Nam, Su Ja ; Moon, Hyun Sook ; Lee, Mi Na ; Jung, Moon Mo ; Hur, Moon Hye ; Ahn, Moon Kyu ;
Analytical Science and Technology, volume 14, issue 1, 2001, Pages 59~63
A PVC membrane electrodes based on Fe(II)-dipyridyl-mefenamic acid ternary complex as ion exchanger were prepared using o-nitrophenyl octyl ether as a plasticizer. The 2,2'-dipyridyl, 4,4'-dipyridyl and 4,4'-dipyridyl-2,2'-dipyridyl were used as dipyridyl derivative ligand. The electrode dxhibits a fast stable and linear response for
mefenamate with an anionic slope of -55.98, -49.47, -59.35mV/decade in pH 8.9 borate buffer solution respectively. Potentiometric selectivity measurements revealed negligible interferences from aromatic and aliphatic carboxylic acid salts.
A Study of Determination of Minimum Detectable Activity at Measuring of Pu Isotopes in Environmental Samples
Lee, Myung-Ho ; Cho, Young-Hyun ; Choi, Gun-Sik ; Lee, Chang-Woo ; Shin, Hyun-Sang ;
Analytical Science and Technology, volume 14, issue 1, 2001, Pages 64~71
In this paper, the formula of lower limit of detection considering the measuring time of sample and background was derived using the basic concepts of lower limit of detection. Among parameters affecting the determination of MDA value, the MDA values were calculated with variation of amount of sample and measuring time of sample and background. The results of adequate division between the measuring time of sample and that of background studied in this research make it possible to evaluate confidence limits on the radio analytical results in the environmental sample.
Oxidative Decomposition of 2, 4, 6-Trichlorophenol Catalyzed by Polymer Supported Metalloporphyins
Park, Hye-Ok ; Lee, Bo-Young ; Rhee Paeng, Insook ;
Analytical Science and Technology, volume 14, issue 1, 2001, Pages 72~79
Oxidative decomposition of 2, 4, 6-trichlorophenol(TCP) was studied in aqueous solution. Iron and manganese protoporphyrin [or tetrakis(p-carboxyphenylporphyrin)] and their polymer supported derivatives were used as catalysts, and
and tert-butyldroperoxide(TBHP) as oxidants. Metalloporphyrin itself shows very poor catalytic activity in oxidative decomposition of TCP with oxidant. However, very high catalytic activity was observed when metalloporphyrin was chemically bound to newly synthesized polymers or XAD2 resin. Additionally, it revealed much higher catalytic activity in the presence of water-soluble polymers having a electron-donating axial ligand such as pyridine and immidazole. Maleic acid and chloromaleic acid were found in the resulting solution by ESI-MS. Especially, XAD2-supported metalloporphyrins can be reused as catalysts due to insolubility to solvent, and stability against oxidant.
Degradation of Humic Acid and Formation of Formaldehyde in PEROXONE Processes
Kim, Kei Woul ; Rhee, Dong Seok ;
Analytical Science and Technology, volume 14, issue 1, 2001, Pages 80~87
This research was studied the action of the coupling ozone-hydrogen peroxide on aqueous humic acid. PEROXONE process is enhanced the generation of hydroxyl radicals which is effective for degradation of organic matters. Therefore the changes of
and TOC were investigated through the change of concentrations, injection time of
, initial pH of aqueous humic acid and concentrations of radical savenger as
in the PEROXONE processes. And the GC/ECD was used to detect the formaldehyde formed by ozonation of humic acid. From the experimental results, concentrations and injection time of
and initial pH in solution in the PEROXONE processes were very important for enhancing the efficiency of degradation in humic acid. The results indicated that removal efficiency of TOC was the highest when concentration of
was 5mg/L, injection time of
was 5 minutes and initial pH in solution was 10.5. And presence of alkalinity in solution was reduced the efficiency of treatment. The formaldehyde were formed less PEROXONE processes than only ozone. When initial pH in solution were changed from 3.5 to 10.5, the formaldehyde were formed highest concentration at pH 5.
Analysis of Dioxins in Meat by HRGC/HRMS
Choi, Dongmi ; Hu, Soojung ; Jeong, Jiyoon ; Won, Kyungpoong ;
Analytical Science and Technology, volume 14, issue 1, 2001, Pages 88~93
To measure the levels of dioxins in food selling at local markets, meat was analyzed by high resolution gas chromatography/high resolution ass spectrometry (HRGC/HRMS). The food samples were obtained from 5 large cities of Seoul, Chunchon, Daejon, Kwangju and Busan in Korea. All the samples were minced and extracted with Soxhlet extractor for 18 hours. After extraction, extracts were cleaned up by sulfuric acid impregnated silica gel, purified on a series of silica gel, alumina, carbon column chromatography and then analyzed by HRGC/HRMS. The contaminated levels were calculated as the TEQs by multiplying with the corresponding WHO-TEFs for each congeners. The overall recoveries were ranged from 80% to 153% and the limit of detection was about 0.01 ppt at S/N>3. The levels of PCDD/Fs for beef, pork and chicken were 0.018, 0.008 and <0.001 pgTEQ/g, respectively. In addition, the levels of non-ortho-co-planar PCBs for beef, pork and chicken were 0.008, 0.002 and 0.001 pgTEQ/g, respectively. Among food samples analyzed, chicken showed the lowest level of dioxin-like compounds. Regarding congener pattern, OCDD and PCB #77 were the highest contributing congeners.