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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
> Journal Vol & Issue
Analytical Science and Technology
Journal Basic Information
Journal DOI :
The Korean Society of Analytical Science
Editor in Chief :
Volume & Issues
Volume 15, Issue 6 - Dec 2002
Volume 15, Issue 5 - Oct 2002
Volume 15, Issue 4 - Aug 2002
Volume 15, Issue 3 - Jun 2002
Volume 15, Issue 2 - Apr 2002
Volume 15, Issue 1 - 00 2002
Selecting the target year
Accumulation of Organonitrogen Pesticides in Fishes and Amphibians from the Basin of Major Rivers of S. Korea
Oh, Dong-Jin ; Kim, Young-Bok ; Lee, Ji-Young ; Moon, Ji-Yong ; Jeong, Gi-Ho ;
Analytical Science and Technology, volume 15, issue 6, 2002, Pages 489~495
In this study, we determined distribution status of organonitrogen pesticides such as trifluralin, atrazine, metribuzin, alachlor, malathion, nitrofen, permethrin, cypermethrin, fenvalerate, and parathion accumulated in the fresh water fishes and amphibians. We collected those samples at 31 sites from the basin of major rivers, and separated the muscular tissue as a final sample for analysis. In the pretreatment process, lipid was eliminated by using acetonitrile and n-hexane, and pesticides were reextracted with dichloromethane. The extract was dehydrated and concentrated, and then cleaned it up by passing the Florisil column, and pesticide content was finally determined by using a GC-MS system after introducing isotope labelled references. The accumulation level was observed in the range of
in amphibians and
in fishes including cypermethrin as
Fundamental study of electrolyte cathode atomic discharge for development of on-line monitoring system
Kim, Kyung-Mi ; Woo, Young-A ; Cho, Won-Bo ; Kim, Hyo-Jin ;
Analytical Science and Technology, volume 15, issue 6, 2002, Pages 496~501
The electrolyte cathode glow discharge (ELCAD) is a new optical system for direct determination of trace heavy metals in flowing water. ELCAD has been successfully developed for on-line monitoring of heavy metals in flowing water. The application of an atmospheric glow discharge between an electrolyte solution cathode and a platinum rod anode led to the development of stable discharge. The fundamental aspects of new plasma source have been investigated. The fundamental study of ELCAD system has been measured plasma temperature using Einstein-Boltzmann equation after searching Fe atomic emission lines. The spectrum of each elements such as Cu, Pb, Fe, Ni and Cr show only major elemental line and no ionic line possibly due to low temperature plasma source. The detection limits of each elements are also investigated. These informations show that this type of plasma may apply for monitoring of heavy metals in waste water which consists of complex matrix.
The Fundamental Studies and Development of the Modified See - Through Hollow Cathode Glow Discharge Cell for Atomic Emission Spectrochemical Analysis
Lee, Sung-Hun ; Cho, Won-Bo ; Jeong, Jong-Pil ; Choi, Woo-Chang ; Borden, Stuart ; Kim, Kyu-Whan ; Lee, Change-Su ; Lee, Sang-Chun ;
Analytical Science and Technology, volume 15, issue 6, 2002, Pages 502~508
See-through hollow cathode glow discharge cell has been developed for the trace analysis of metal ions. The systems consists of new glow discharge cell improved the cooling system. In the case of previous type of hollow cathode glow discharge cell, it had been utilized for the trace analysis of metal ions but it had a problem that the plasma becomes unstable by air-cooled device. In this study, the modified hollow cathode glow discharge cell has been developed in order to minimize the problem associated with the air-cooled device. thus the stability of the plasma with water-cooling device has been improved and also the higher plasma temperature has been measured. The fundamental characteristics of modified systems have been investigated. And the discharge parameters, such as discharge pressure, material, and diameter of cathode, have been studied to find optimum discharge conditions.
Determination of Inorganic Elements in Women Blood Serum using Instrumental Neutron Activation Analysis
Moon, Jong-Hwa ; Chung, Yong-Sam ; Lee, Ok-Hee ;
Analytical Science and Technology, volume 15, issue 6, 2002, Pages 509~513
In this study, instrumental neutron activation analysis was used to assess the concentration level of inorganic trace elements in Korean women blood serum. It was found out that high concentration of Na and Cl incurs analytical interference, but 12 elements of Br, Ca, Cl, Co, Cr, Cs, Fe, K, Na, Rb, Se, Zn can be determined under the condition of interference minimization. Serum samples collected from 63 women were analyzed and the concentration level and range of the elements were evaluated. NIST SRMs were analyzed simultaneously for analytical quality control. The average values of Na and Cl determined in serum samples are around 3000 mg/L, Ca is 100 mg/L and K is 200 mg/L. Besides, Br, Se and Zn have concentration level of 6.0, 0.1 and 1.0 mg/L, respectively. It was found that there is no significant difference between the present values and reported values.
The Fundamental Studies and Development of Modified Electrothermal Vaporization Hollow Cathode Glow Discharge Cell
Lee, Seong-Hun ; Cho, Won-Bo ; Jeong, Jong-Pil ; Choi, Woo-Chang ; Kim, Kyu-Whan ; Woo, Jeong-Su ; Lee, Chang-Su ; Kang, Dong-Hyun ; Lee, Sang-Chun ;
Analytical Science and Technology, volume 15, issue 6, 2002, Pages 514~520
The electrothermal vaporization (ETV) hollow cathode glow discharge atomic emission spectrometer for analysis of liquid sample has been developed and characterized. This system has improved the sample introduction method of electrothermal vaporization and the hollow cathode glow discharge. The sample introduction method was possible to provide high analyte transport efficiency to the plasma by helix coil made of tungsten material. In addition, small volume samples (<
) could be used. The system has glow discharge cell with special design for improvement of precision. The effect of discharge parameters such as discharge power, gas flow rate has been studied to find optimum condition. The emitted light was effectively carried into detector by fiber optic cable in UV region. The calibration curve of Pb, Cd were obtained with 3 samples.
Analysis of Trace Elements in Mud Flat with Neutron Activation Analysis (NAA) and Atomic Spectroscopy
Nam, Sang-Ho ; Kim, Min-Jae ; Chung, Yong-Sam ; Kim, Sun-Ha ;
Analytical Science and Technology, volume 15, issue 6, 2002, Pages 521~528
Neutron Activation Analysis (NAA) and Inductively Coupled Plasma Atomic Emission Spectrometry (ICP-AES) have been applied for the determination of inorganic elements in mud flat of south seaside in Korea. The analytical results of Al, Ca, Fe, Mg, K and Na by NAA were compared with those by ICP-AES. The results show that NAA is superior to ICP-AES for the determination of minor elements in sediment. Accordingly, NAA will play an important role in the analysis of environment samples such as mud flat and sediment having complex matrix.
Trace Analysis of Racemic Isomers of Flurbiprofen in Human Urine using Column Switching-HPLC
Choi, Hyun-Cheol ; Kang, Sin-Jung ; Youn, Mi-Ok ; Lee, Su-Jung ; Kim, Ho-Jung ; Park, Chang-Hun ; Cha, Ki-Won ;
Analytical Science and Technology, volume 15, issue 6, 2002, Pages 529~533
The separation and determination method of racemic isomers of flurbiprofen in urine samples have been investigated using column switching- HPLC, which include the sample treatment and concentration column. The optical rotation of two isomers separated were measured to identify d-form and l-form. The calibration curves are liear in the ranges of
for both d-form and l-form. The detection limits were
for l-isomes and
for d-isomer. The coefficients of variation of intra-day and inter-day precision of this method were about 1.8%. The present method was apllied to determine the concentration of racemic isomers in urine sample from human eating the drug.
Analysis of trace odorous compounds (geosmin and 2-methylisoborneol) in water by using GC/MS
Kim, Tae-Jon ; Kim, Byung-Joo ; So, Hun-Young ; Kwang, Ho ;
Analytical Science and Technology, volume 15, issue 6, 2002, Pages 534~539
We established an analytical method for the measurement of trace amounts of earthy/musty odorous geosmin (GSM) and 2-methylisoborneol (2-MIB) in water using GC/MS. Water samples were extracted with n-hexane (liquid-liquid extraction, LLE) and the extracts were measured by GC/MS. The extraction yields of the two compounds were tested to be (
)% and (
)%, respectively. The limits of quantitation (LOQs) of the two compounds by this method were greatly improved to ~0.3 ng/L. The analytical methods were applied to analyze water samples from several rivers in Korea and waters after water treatment processes. The highest levels of geosmin and 2-methylisoborneol in raw water from a river were measured to be (
) ng/L and (
) ng/L, respectively. The levels only slightly decreased to (
) ng/L and (
) ng/L even after water treatment, indicating that the odorous compounds were not properly removed by the treatment processes.
Crystallographic Analysis of Ar Encapsulate within Cs
Lim, Woo Taik ; Kim, Bok Jo ; Park, Jong Sam ; Chang, Chang Hwan ; Jung, Sung Wook ; Heo, Nam Ho ;
Analytical Science and Technology, volume 15, issue 6, 2002, Pages 540~549
The arrangement of encapsulated Ar atoms in the molecular-dimensioned cavities of fully dehydrated zeolite A of unit-cell composition
-A) has been studied crystallographically to probe the confinement effect of guest species in microporous environment. Atoms of Ar were encapsulated in the cavities of
-A by treatment with 410 atm of Ar at
for two days, followed by cooling at room temperature. The crystal structure of
= 410 atm,
) has been determined by single crystal X-ray diffraction technique in the cubic space group
at 21 (1)
and 1 atm. Encapsulated Ar atoms are distributed in three crystallographic distinct positions: 1.5 Ar atoms per unit cell opposite 6-rings, 1.5 opposite four-rings in the large cavity, and finally 1.0 in the sodalite-unit. The possible structures of argon clusters, such as
, are proposed.
The Study on the Mechanism for Oxidation Reaction of Boratabenzene by Cyclic Voltammetry
Shin, Ueon-Sang ;
Analytical Science and Technology, volume 15, issue 6, 2002, Pages 550~555
The oxidation mechanism of boratabenzene was studied. As a model compound the ferrocene analogue (
-Pentamethylcyclopentadiennyl)iron 3 was chosen. The complex underwent irreversible oxidation in the presence of ortho proton on the ring and a methyl group on the boron atom in methanol medium. Chemical oxidations with
in MeOH gave, via a transition state , at first the derivates 6 and 7, which were converted to each 8 and 9.
Characterization on Air Pollution of Gunpo City by Measurement of VOCs in Air
Park, Hyun-Mee ; Kim, Jee-Hyuon ; Park, Il-Yong ; Kim, Young-Man ; Lee, Kang-Bong ;
Analytical Science and Technology, volume 15, issue 6, 2002, Pages 556~566
Gunpo city, a medium sized city formed with a basin is populated with a little more than 270,000 peoples and includes the industrial area with about 600 factories. It has been recognized for a long time that peoples living nearby industrial area have complained on serious air contamination due to the geographical and environmental factors. This study was performed on measurement of volatile organic compounds (VOCs) and malodor for the air sampled in various places of Gunpo city, and made comparison with VOCs levels in specific area of Seoul. This work would play important role for the efficient management of air contamination of Gunpo city. Samplings were done in the rooftop of eleven village office buildings including Gunpo station in June 12th, 2001. Analytical results indicate that VOCs levels of Gunpo-1-dong, Gunpo station and Kumjungdong regions neighboring industrial area were much higher than the rest of areas, and this fact shows that the origin for air contamination of Gunpo would be industrial area than car exhaustion gases.
Characterization of Unburned Carbon Particles from Fly Ash Using SEM
Ahn, Yang-Kyu ; Kil, Dae-Sup ;
Analytical Science and Technology, volume 15, issue 6, 2002, Pages 567~573
The most important and largest commercial outlet of fly ash in Korea is a replacement material of Portland cement in concrete industry. The high level of unburned carbon in ash brings about some malfunctions in concrete. Therefore, fly ash is refined to improve the quality as a concrete additive. In this process, a lot of the residual carbon is produced, and discarded now. In the present study, to find out a valuable outlet of the enriched carbon samples, the basic morphology of residual carbon in fly ash from Boryung power plant was investigated. The unburned carbon characterization included shape, size measurement, and chemical analysis was examined using scanning electron microscope (SEM) and energy dispersive X-ray spectrometer (EDX).
Carbohydrate Drug (Acarbose) Analysis using by the On-line HPLC/Electrospray Ionization-Mass Spectrometry
Cho, Hyun-Woo ; Myung, Seung-Woon ;
Analytical Science and Technology, volume 15, issue 6, 2002, Pages 574~579
A sensitive and easy high performance liquid chromatograph (HPLC) / electrospray ionization (ESI)-mass spectrometric (MS) method has been developed for the quantitative and qualitative analyses of acarbose and its metabolites. After plasma samples were simply filtered with a syringe filter, the filtered plasma was analyzed by LC/MS. The standard calibration curve for acarbose was linear (
) over the concentration range
in plasma. The metabolite component-I and II, which were metabolized by the
-amylase, were found also by in vitro incubation. The developed method can be utilized to study acarbose and the other carbohydrates.
Confirmation of reference value using uncertainty of multiple measurements
Choi, Jong-Oh ; So, Hun-Young ; Woo, Jin-Chun ; Hwang, Eui-Jin ;
Analytical Science and Technology, volume 15, issue 6, 2002, Pages 580~583
New approach is developed employing the overall uncertainty obtained from multiple measurements to evaluate the statistical significance for the difference between a given reference value and its measured value determined in a lab. The overall uncertainty is determined by separate combinations of the uncertainties arising from systematic and random effects. It is shown that the uncertainty term in regular t-test can be underestimated by n measurements.