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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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Analytical Science and Technology
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Journal DOI :
The Korean Society of Analytical Science
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Volume & Issues
Volume 13, Issue 6 - 00 2000
Volume 13, Issue 5 - 00 2000
Volume 13, Issue 4 - 00 2000
Volume 13, Issue 3 - 00 2000
Volume 13, Issue 2 - 00 2000
Volume 13, Issue 1 - 00 2000
Selecting the target year
Uncertainty in Measurements and Analysis (1) - Expression and Calculation of Uncertainty by the International Rule ( GUM ) -
U, Jin-Chun ;
Analytical Science and Technology, volume 13, issue 2, 2000, Pages 19~19
Kim, Deok-Hui ; Jang, Seok-Gyu ;
Analytical Science and Technology, volume 13, issue 2, 2000, Pages 27~27
Adsorption and Antibacterial Properties of Metal Ion Treated Activated Carbon Fiber
Oh, Won-Chun ; Bang, Seong-Ho ;
Analytical Science and Technology, volume 13, issue 2, 2000, Pages 131~135
We studied adsorption isotherm, surface properties and antibacterial activity of Cu treated activated carbon fiber (ACF). The BET surface area of Cu treated ACF are distributed to
. The adsorption results show that BET surface areas move gradually to lower value with increasing treated Cu mole concentration. Using t-method, the specific micropore volumes and average pore size were obtained. From the SEM study, it is also observed that many of micropores in activated carbon fiber are blocked surface after the treatment. And we also observed that the activity of E. coli in kind of colon bacillus increases gradually to larger range with increasing Cu mole ratio. From these results, we suggest the antibacterial mechanism for metal treated ACF.
Constructing Database for Drugs and its Application to Biological Sample by HPTLC and GC/MS
Yoo, Young-Chan ; Park, Sung-Woo ; Lim, Mie-Ae ; Baeck, Seung-Kyung ; Park, Seh-Youn ; Lee, Ju-Seon ; Lho, Dong-Seok ;
Analytical Science and Technology, volume 13, issue 2, 2000, Pages 136~150
For the identification of unknown drugs in biological samples, we attempted rapid high performance thin layer chromatographic method which is sensitive and selective chromatographic analysis of high performance thin layer chromatography (HPTLC) with automated TLC sampler and ultra-violet (UV) scanner. We constructed HPTLC database (DB) on two hundred five drugs by using the data of Rf values and UV spectra (scan 200-360 nm) as well as gas chromatography/mass spectrometry (GC/MS) DB on ninety six drugs by using the data of relative retention time (RRT) on lidocain and mass spectra. After extracting drugs in biological sample by solid phase extraction (Clean Screen ZSDAU020), we applied them to HPTLC and GC/MS DB. Drugs, especially extracted from biological samples, showed good matching ratio to HPTLC DB and these drugs were confirmed by GC/MS. In conclusion, this DB system is thought to be very useful method for the screening of unknown drugs in biological samples.
Effects of Acid and Pre-Reductant in the Analysis of Arsenic by Hydride Generation-Atomic Absorption Spectrometry
Lim, Heon-Sung ; Lee, Sueg-Geun ;
Analytical Science and Technology, volume 13, issue 2, 2000, Pages 151~157
Effects of acids and pre-reductants in the analysis of arsenic have been studied by hydride generation-atomic absorption spectrometry. The analytical results were strongly dependent on the acid concentrations. All the pre-reductants was very effective to observe the arsenic signal at strong acid concentrations (3 M-5 M). However, at the low acid condition (
), L-cysteine only showed a reasonable effect on the absorption signal. When the sample was treated with the nitric acid, absorption signal was unstable and was also decreased. Although interference effects were observed from metal ions such as
at low acid condition, the generation of hydride could be increased by the strong acid condition.
The Comparison of Analytical Methods for Gypsum and Gypsum Slurry
Kim, Kyeongsook ; Yang, Seugran ; Park, Hyunjoo ; Lim, Chunsik ;
Analytical Science and Technology, volume 13, issue 2, 2000, Pages 158~165
The purity of gypsum and quantitation of impurities of flue gas gypsum will not only play an important role in deciding of the optimal condition during a trial run of FGD (flue gas desulfurization), but also can be utilized in quality control of gypsum. The purity of gypsum can be determined from combined water, sulfur trioxide and calcium concentration. We found that the thermal analysis by TGA (thermogravimetric analysis) was the most accurate and convenient method to determine the purity of gypsum. This method will be done in a hour and the results were reproducible. On the other hand, the best way of the analysis of impurities in gypsum was fusion method using
as a fusion agent. We also determined the amount of
gas to analyze magnesium carbonate and calcium carbonate contents. The analyses of combined water by TGA, fusion method followed by ICP-AES (inductively coupled plasmaatomic emission spectroscopy) and determination of
amount can lead to more accurate and convenient method for gypsum analysis.
A Study on the Diagnosis of Power Transformers by Analysis of Insulating Oil
Kim, Kyeongsook ; Lim, Chunsik ; Park, Hyunjoo ; Lee, Taewon ; Yang, Seungran ;
Analytical Science and Technology, volume 13, issue 2, 2000, Pages 166~172
The life expectation of power transformers is basically dependent on the aging deterioration of insulating paper which can not be obtained from operating transformers. Therefore, it will be very useful if we can manage transformers by indirect analysis of degradation products. "Furan derivatives" are known the decomposition products which are generated by the degradation of cellulose in insulating paper. We proved that 2-furfural is the only measurable product from our transformers, and determined easily the concentration of 2-furfural by HPLC without any specific pretreatments, Compared to concentration of
and CO by GC, the concentration of 2-furfural by HPLC can estimate more accurately aging characteristics of transformers. We expect that these results can be utilized to predict the aging characteristics and life diagnosis of power transformers.
Synthesis, Stability Constants, X-ray Structure and Electrochemical Studies of Copper (II) 1, 14-Bis (2-hydroxybenzyl)-2, 6, 9, 12-tetraazatetradecane.tetrahydrochloride Complex
Kim, Sun-Deuk ; Kim, Jun-Kwang ; Kim, Seong-Yun ;
Analytical Science and Technology, volume 13, issue 2, 2000, Pages 173~178
A new open-chain ligand containing two phenol groups, 1, 14-Bis (2-hydroxybenzyl)-2, 6, 9, 12-tetraazatetradecane(bsated) was synthesized as its tetrahydrochloride salt and characterized by elemental analysis, mass, infrared and NMR. Its proton dissociation constants (
) and stability constants (
were determined at
) ionic strength in aqueous solution by potentiometry. The X-ray structure of its copper (II) complex [Cu(bsated)]
was reported: Monoclinic space group
with Z=4. Electrochemical studies of [Cu(bsated)]
complex in dimethyl sulfoxide (DMSO) solution containing tetrabutylammonium perchlorate (supporting electrolyte) were carried out by cyclic voltammograms (CV) and normal pulse voltammetry (NPV).
Intercomparison and Determination of Trace Elements in Urban Dust by Neutron Activation Analysis
Chung, Yong-Sam ; Moon, Jong-Hwa ; Kim, Sun-Ha ; Park, Kwang-Won ; Kang, Sang-Hun ;
Analytical Science and Technology, volume 13, issue 2, 2000, Pages 179~188
Trace elements in air samples artificially loaded on filters with urban dust and the bulk material of urban dust as an environmental sample were determined non-destructively using instrumental neutron activation analysis. Standard reference material (Urban Dust, SRM 1648) of the National Institute of Standard and Technology was used for the analytical quality control. The relative error for 37 elements was less than 15% and the standard deviation was less than 10%. 29 elements in the urban dust and 21 elements in the loaded filter sample were determined respectively. To evaluate the proficiency and reliability of the measurement, data intercomparison was performed and 39 analytical laboratories participated in the analysis using different analytical methods; neutron activation analysis, particle induced X-ray emission analysis, X-ray fluorescence analysis and atomic absorption spectrometry. Z-scores were calculated using the standard deviation of the laboratorie's mean as target standard deviation, and a good result was obtained that the values fall between -1 and +1 except some elements.
Simultaneuous Determination of As(III) and As(V) in Disused Mine Tailing Samples by Hydride Generation-Inductively Coupled Plasma-Atomic Emission Spectrometry
Kim, Sun-Tae ; Lim, Yoo-Ree ; Park, Kyung-Su ; Chung, Jin-Ho ;
Analytical Science and Technology, volume 13, issue 2, 2000, Pages 189~193
Arsenic (III) and arsenic (V) in disused mine tailing samples have been determined simutaneuously by hydride generation inductively coupled plasma atomic emission spectrometry (HG-ICP-AES). Total arsenic was determined using 2%
and 6 M HCl after prereduction of As(V) to As(III) with) 1M KI. Arsenic (III) was determined selectively using citrate/citric acid buffer with range of pH 5-6, it was determined by HG-ICP-AES. Arsenic (V) can be evaluated by the differences. According to the results, arsenic (V) was over 90% among the total arsenic extracted from disused mine tailing samples.
Adsorption and Biological Properties of Ni-treated PAN Based Activated Carbon Fiber
Oh, Won-Chun ;
Analytical Science and Technology, volume 13, issue 2, 2000, Pages 194~199
The study on the adsorption, the surface properties and the antibacterial effects of the Ni-treated PAN based activated carbon fibers was carried out. In the adsorption study on the Ni-treated PAN based ACFs, Type I isotherms for N1-N3 and Type II-Type III isotherms for N4-N6 were obtained, respectively. Futhermore, their adsorbed volumes slowly were decreased with the increase in the mole concentration of Ni on the treated PAN based ACFs. From the BET equation, the specific surface areas of the Ni-treated PAN based ACFs were in the range of
. The micropore volumes obtained from
-method using common-t value were
. The surfaces of PAN based ACFs partially blocked by metal after the treatment were observed from the SEM micrographs. Finally, from the antibacterial effects using Shake flask method against E. coli, the percentage of the effects was 92.5-100% and the antibacterial effect was increased with the increase in mole concentration of Ni treated.
Growth Mechanisms of Graphite Spherulites in the Nodular Cast Iron and the High-pressure-treated Ni-C alloy
Park, Jong-Ku ; Ahn, Jae-Pyoung ; Kim, Gyeungho ; Kim, Soo-Chul ;
Analytical Science and Technology, volume 13, issue 2, 2000, Pages 200~207
The growth mechanisms of graphite spherulite both in the nodular cast iron and the high pressuretreated Ni-C alloy were investigated by SEM, HRTEM and EELS. The internal microstructure and lattice image of graphite spherulite extracted from Ni-C alloy were compared with those of graphite spherulite extracted from the nodular cast iron. The ratios of
bonding in the respective graphite spherulite measured by EELS, are compared each other. The graphite spherulite of Ni-C alloy had little internal defects and much
carbon species compared to that of the nodular cast iron. Present difference in microstructural features and bonding characters indicated that the graphite spheruites in the high pressuretreated Ni-C alloy grew by different mechanism compared with those in the nodular cast iron.
Determination of Hydroxyapatite Precipitation Condition from the
Oh, Young-Jei ;
Analytical Science and Technology, volume 13, issue 2, 2000, Pages 208~214
The formation and dissolution of hydroxides, carbonates and hydroxyapatite (HAp), which depend on the pH of solution, are important factor for the preparation of homogeneous and fine HAp,
, ceramic powder from the
system. Since the solubility of each complex ion is a linear function of pH, the solubility diagram can be obtained by plotting the logarithmic molar concentrations calculated from the values of the equilibrium constants and solubility products for hydroxides, carbonates, and hydroxyapatite. The optimum pH condition for the formation of single phase
was estimated as
through the theoretical consideration. The HAp powder dried at
showed a fine agglomerated particles with a size of 75 nm. The HAp powder calcined at
consisted of nearly homogeneous particles with a size of 450 nm. Even though the dried HAp particles consisted of agglomeration, mechanical properties were superior due to fine microstructure after sintering.
Chemical Analysis of Fly Ashes from Municipal Solid Waste Incinerators
Jang, Seong-Ki ; Choi, Duk-Il ; Lim, Chang-Ho ; Lee, Jin-Sook ;
Analytical Science and Technology, volume 13, issue 2, 2000, Pages 215~221
Analysis of fly ashes from the MSW incinerators was carried out using XRF, ICP-MS and ICP-AES. It was found that the major elements of fly ash were Ca, K, Na, Si, Al, S, Cl and O by the XRF analysis. The XRD spectra showed that the fly ashes were mainly consisted with the chlorides, hydroxides, carbonates and also oxides of former elements. For the determination of minor elements such as Zn, Pb, Cu, Cr, and Cd, we used ICP-AES and ICP-MS after microwave digestion and the results were compared with the result of XRF.
Development and Properties of Carbon monoxide Detector for Ambient Air monitoring
Cho, Kyung-Haeng ; Lee, Sang-Wha ; Lee, Joung-Hae ; Choi, Kyong-Sik ;
Analytical Science and Technology, volume 13, issue 2, 2000, Pages 222~228
A detector for monitoring carbon monoxide (CO) in ambient air by nondispersive infrared (NDIR) spectroscopy has been developed and investigated its sensitivity and stability. The essential parts of the absorption cell are three spherical concave mirrors so as to improve the sensitivity by increasing the light path length in the cell. The radius and center of curvature of mirrors and position in the cell was calculated by computer simulation in order that the light path length may be 16m into the 50cm cell. The number of traversals and optical path properties were confirmed by laser beam alignment in transparent absorption cell. The photoconductive type lead selenide (PbSe) was used as CO sensing material, which was cooled to increase the responsibility by thermoelectric cooling method. The detection limit and span drift of the developed CO detector was 0.24ppm and 0.03ppm(v/v) respectively.
Quality Control on Standard Samples of
of Drinking Water Quality Pollutant
Park, Sun Ku ; Song, Ki Bong ; Kim, Pyong Chung ;
Analytical Science and Technology, volume 13, issue 2, 2000, Pages 229~233
The study was carried out to confirm the reliability of standard samples, low concentration
, high concentration
, on the base of quality control chart. The analytical results had the precise reliability with standard deviation of 0.010, 0.017, 0.056 and 0.019, respectively. When three persons A, B and C, who had different analytical experiences, analyzed the standard samples six times repeatedly, C person, who had more academic career and analytical experience, produced far better reliability for analytical results. Therefore, these standard samples were very suitable for external quality control test, because all persons' average values for analytical results were close to the values of prepared standard samples.
Characterization of Humic Acid in the Chemical Oxidation Technology(I) - Characteristics by Photocatalytic Oxidation Process -
Kim, Jong Boo ; Rhee, Dong Seok ;
Analytical Science and Technology, volume 13, issue 2, 2000, Pages 234~240
The efficiency of Photocatalytic Oxidation Process were investigated for the treatment of Aquatic Humic Substances (AHS). In UV-only system, pH 7-9 was the optimum pH range for TOC removal, and alkali range was the optimum pH for absorbance decrease. In UV/
system, the optimum
dosage was 50ppm and over 50ppm of
dosage was not effective for removal of AHS. In UV/
dosage was 20mM, when over 20mM dosage, removal of TOC (Total Organic Carbon) and absorbance was decreased. Radical scavenger affected on the photo-oxidation of AHS. Removal rate of TOC and absorbance was decreased by addition of carbonate ions and TOC removal was more effected than that of absorbance.
Characterization of Humic Acid in the Chemical Oxidation Technology(II) - Characteristics by Ozonation -
Rhee, Dong Seok ; Jung, Young-Rim ;
Analytical Science and Technology, volume 13, issue 2, 2000, Pages 241~249
In this paper, ozonation of humic acid in water was characterized using
absorbance, TOC, Ultra Filtration and
. Also, carbonyl compounds in ozonated water were analyzed by GC/MS using PFBOA method. Ozonation by-products of water containing humic acid were determined as formaldehyde, acetaldehyde, acetone, glyoxal and methylglyoxal. Results of
absorbance and TOC with ozonation time at humic acid 20, 100ppm represent that decrease rate of 80% within ozonation time is 20 min and TOC removal rate of 40-50% within ozonation time is 30 min. Results for
and Ultra Filtration, humic acid of high molecular weight by ozonation are oxidated and decomposed so that it was conversed low molecular weight such as aldehydes, carboxylic acid.
Identification of the Trace Evidence by UV/VIS Microspectrophotometry
Shon, Sung-Kun ; Park, Ha-Sun ; Lee, Jin-Sook ; Park, Sung-Woo ; Cho, Sung-Hye ;
Analytical Science and Technology, volume 13, issue 2, 2000, Pages 250~257
Paint, fiber and dye which play a critcal role in proving the relationship between a suspect and a victim or a crime scene, are one of the most frequently encountered trace evidences at a forensic laboratory, however, in usual, because of infinitesimally small sizes of forensic samples, investigation of the spectroscopic characteristics of such samples is becomming more and more prevalent in forensic science as a non-destructive method. In this study, transmittance/reflectance profiles at ultraviolet-visible region (240-780nm), were investigated by UV/visible microspectro- photometer and used to analyze the spectral characteristics of different types of 14 microfibers, 12 inks of four colors and 44 automotive paints of two colors. Good results for discrimination were given from spectra of these samples due to the characteristic bands in uv/vis region, respectively.
Inter-laboratory Comparison for Analyses of Heavy Metals and Organic Solvent Metabolites in Biological Samples
Yang, Jeong Sun ; Lee, Mi Young ; Park, In Jeong ; Kang, Seong-Kyu ;
Analytical Science and Technology, volume 13, issue 2, 2000, Pages 258~267
The result of five year's experience on Inter-laboratory Comparison for Analyses of Heavy Metals and Organic Solvent Metabolites in Biological Samples was described. Since 1995, around a hundred laboratories in the Occupational Health have participated this program twice per year by the Industrial Safety and Health Law. Four metals in blood and five organic solvent metabolites in urine were examined. Reference samples were made by spiking standard materials to human blood or urine pools treated previously to give homogeneity and stability for a specific time periods. Some reference samples for organic solvent metabolites were made from workers' urine who were exposed to the organic solvents. Some items such as Lead in blood and Hippuric acid in urine showed good accordance between participants while the other items such as Mercury and N-methylformamide in urine showed poor proficient rate. The results were published in the internet or newspaper to help the consumer of the laboratory's service to get the information on them and to make competition between them. The inter-laboratory's comparison program have done greate role to improve the ability of analysis and reliability of analytical data produced from each laboratory.