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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
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Uncertainty in Measurements and Analyses ( 4 ) - Expression and Calculation of Uncertainty by the International Rule ( GUM ) -
U, Jin-Chun ; Seo, Jeong-Gi ;
Analytical Science and Technology, volume 13, issue 5, 2000, Pages 79~79
The Hydrolysis Measurement of Cyclodextrins Using FTIR-ATR Spectrometry
Chung, Chinkap ;
Analytical Science and Technology, volume 13, issue 5, 2000, Pages 549~557
FRIR-ATR spectrometry has been used to monitor the aqueous reactions of compounds without distinct chromophores in ultraviolet and visible regions. For example, hydrolysis reactions of
-cyclodextrin in acidic aqueous solution were studied. FTIR-ATR method has been used for the monitoring of cyclodextrin hydrolysis in 1.0 M. 0.5 M, and 0.1 M HCl solutions, respectively. We also found that the hydrolysis of
-cyclodextrin produced glucose, but the hydrolysis of
-cyclodextrin proceeded further to give more fragmented products than glucose.
Properties of Mononuclear and Binuclear Cu(II) Schiff Base Complexes and Oxidation of Ascorbic Acid
Kim, Sun Deuk ; Lee, Young Seuk ; Park, Jung Eun ;
Analytical Science and Technology, volume 13, issue 5, 2000, Pages 558~564
Mononuclear schiff base ligand N,N'-bissalicylidene-1,2-phenylenediamine(BSPD) and binuclear schiff base ligands N,N',N',N'''-tetrasalicylidene-3,3',4,4'-tetraaminodiphenyl-methane (TSTM), N,N',N'',N'''-tetrasalicylidene-3,3'-diaminobenzidine (TSDB) have been synthesized. Proton dissociation constants of the ligands were determined by potentiometric method. The synthesized ligands and complexes formed with Cu(II) ion. These complexes were investigated by cyclic voltammetry and differential pulse voltammetry. The results revealed two step diffusion controlled redox process. The mononuclear complex Cu(II)-BSPD and binuclear complexes
-TSTM were used in the oxidation reaction of ascorbic acid. The reaction rates were in the order of
-TSDB>Cu(II)-BSPD, indicating that the binuclear
-TSTM complex had the fastest values.
A Study on the Standards for Xe Analysis by Wavelength Dispersive X-ray Spectrometer (WDS) of Electron Probe Micro Analysis (EPMA)
Park, Soon Dal ; Ha, Young Kyeung ; Kim, Jong Goo ; Jee, Kwang Young ; Kim, Won Ho ;
Analytical Science and Technology, volume 13, issue 5, 2000, Pages 565~572
In this paper it was described on the standards for Xe analysis by Wavelength Dispersive X-ray Spectrometer (WDS) of Electron Probe Micro Analyser. According to the experimental results, CsI and
are appropriate compounds as standard specimen for Cs, I and Ba which has not suitable pure metal standards. In the beam current of 10-30 nA range, the Cs x-ray intensity measured from CsBr and CsI was proportional to the beam current. It was found that the linear regression factor R, showing the linearity between the atomic number and x-ray intensity between In and Nd elements, was higher than 0.99 at 25 kV and PET crystal. The caJlculated x-ray intensity of Xe standard from this linear regression equation was 1.095 times higher than that ofTe at 25 kV.
Liquid Phase Adsorption of Activated Carbon Fibers
Moon, Dong Cheul ; Kim, Chang Soo ; Park, Il Yeong ; Kim, Mi Ran ; Hong, Seung Soo ; Lee, Kwang Ho ; Lee, Chang Gi ;
Analytical Science and Technology, volume 13, issue 5, 2000, Pages 573~583
Activated carbon fibers (ACFs) were prepared from various precursors of plantic, synthetic, and mixed fabrics of viscous rayon and cotton. Their adsorption performances of phenol and methylene blue in aqueous phase were evaluated through their adsorption isotherms, adsorption rates and breakthrough curves. The two adsorbates showed type I adsorption isotherm on ACFs. Adsorption rates to ACFs were 100 fold faster than to GAC. The effective diffusion coefficients of the adsorbates in ACFs were twenty fold greater than in GAC. The ACFs removed completely ten organic pollutants from a prepared water specimens through the 2nd column of a natural filtration method where 50 L of the water samples were treated.
A Study on the Separation of Neodymium from the Simulated Solution of
Spent Nuclear Fuel
Choi, Kwang Soon ; Kim, Jung Suk ; Han, Sun Ho ; Park, Soon Dal ; Park, Yeong Jae ; Joe, Kih Soo ; Kim, Won Ho ;
Analytical Science and Technology, volume 13, issue 5, 2000, Pages 584~591
The separation of Nd from the simulated
spent fuel solution with sequential two-step anion exchange separation has been studied. To prepare the simulated
spent nuclear fuel, unirradiated
whose composition consists of small
particle dispersed in an Al matrix with Al cladding was dissolved with a mixture of 4 M HCl and 10 M
and 8 or 15 fission product elements were added to the dissolved solution. The trace amount of silica in the solutions was removed by evaporating to dryness with HF and the U was adsorbed on the first anion exchange resin. Neodymium can be purely isolated from the fission product elements with a methanol-nitric acid eluent using the second anion exchange resin. A large excess of Al didn't influence on the elution velocity of Nd, but reduced the eluted contents of Nd, Al, Eu, Gd, Sm and Sr, A large amount of Al was removed first from the column with 3 mL of loading solution (0.8 M
/99.8% MeOH) before Nd elution by the eluent [0.04 M
-99.8% MeOH(1:9)]. The recovery of Nd was more than 94%, regardless of Al contents. Taking the 9 to 13 mL fraction of eluate was effective to purely isolate Nd.
Simultaneous Determination of Biliary Free and Phospholipid Fatty Acids Using Gas Chromatography-Mass Spectrometry
Yang, Yoon Jung ; Lee, Seon Hwa ; Chung, Bong Chul ;
Analytical Science and Technology, volume 13, issue 5, 2000, Pages 592~600
The concentration of free fatty acids and fatty acid composition as well as cholesterol supersaturation in bile may be an important factor in the gallstone formation. Therefore, we simultaneously determinded 23 fatty acids in bile by selected ion monitoring (SIM) method of gas chromatography-mass spectrometry (GC-MS). Biliary fatty acids were extracted by aminopropyl column and the extracts with (phospholipid fraction) or without (free fatty acid fraction) alkaline hydrolysis of phospholipid were derivatized with MSTFA/TMCS (N-methyl-N-trimethylsilyl-trifluoroacetamide/trimethylsilylchloride) mixture in order to be detected on the GC-MS. The recovery range of this method was 61.1-99.0% and the RSD value of within-a-day and day-to-day test were 3.1-25.6% and 3.8-27.0%, respectively. Using this method, biliary profile was investigated in the bile of normal controls and patients with gallstones. The amounts and their distribution of free and phospholipid fatty acids showed different pattern between normal subjects and patients.
Determination of La in
Spent Nuclear Fuel by Ion Chromatography-Inductively Coupled Plasma-Mass Spectrometry
Han, Sun Ho ; Choi, Kwang Soon ; Kim, Jung Suk ; Jeon, Young Shin ; Park, Yang Soon ; Jee, Kwang Yong ; Kim, Won Ho ;
Analytical Science and Technology, volume 13, issue 5, 2000, Pages 601~607
Lanthanum has been used as one of the burnup monitor in spent nuclear fuel.
spent nuclear fuel contains small amount of La in high concentration of U and Al. Therefore, chemical separation of La is required to remove matrix elements. At first, ion chromatography (IC) and inductively coupled plasma systems were installed in radiation shielded glove box to handle the radioactive samples. Retention behavior of uranium, aluminum, lanthanum and some interesting fission products (Sr, Zr, Y, Mo, Ru, Pd, Rh, Cs, Ba, Ce, Pr, Nd, Sm, Eu and Cd) was investigated using the CG10 column and
-HiBA eluent. As all elements were eluted earlier than lanthanum in 0.2 M
-HiBA eluent, a portion of U and Al was directly passed to waste using a three way valve between the column and the nebulizer. Thus it was possible to determine the lanthanum in a high concentration of U and Al matrix. Retention time of La was about 12 minutes in this separation condition. Optimum range for the determination of La in
spent nuclear fuel was
(ppb) with this system and detection limit was
in case of
of sample volume.
Preconcentration and Determination of Trace Cobalt and Nickel by the Adsorption of Metal-PDC Complexes on the Anion-Exchange Resin Suspension
Han, Chul-Woo ; In, Gyo ; Choi, Jong-Moon ; Kim, Sun Tae ; Kim, Young-Sang ;
Analytical Science and Technology, volume 13, issue 5, 2000, Pages 608~615
A determination method of trace nickel and cobalt in water samples was studied and developed by adsorbing their complexes on ion exchange resin suspension. The analytical ions were formed as complexes with a ligand of APDC (ammonium pyrrolidinedithiocarbamate) and adsorbed on anion exchange resin of Dowex 2-X8. After the suspension was filtered out with membrane filter, the complexes were dissolved in HCl solution by an ultrasonic vibrator for ET-AAS determination. Several conditions were optimized as followings. pH of sample solution: 5.0, amount of ligand APDC: more than 430 times in mole ratio, the type and concentration of acid: 0.1 M HCl, and vibration time: 7 minutes. The addition of palladium in the HCl solution could improve the reproducibility and sensitivity by a matrix modification in the absorbance measurement. This procedure was applied for the analysis of three kinds of real water samples. The detection limits equivalent to 3 times standard deviation of blank were Co 0.36 ng/mL and Ni 0.27 ng/mL and recoveries in spiked samples were 99-102% for cobalt and 100-105% for nickel.
Determination of Phthalate Esters and Adipate in Water and Sediment Samples
Myung, Seung-Woon ; Chang, Yoon-Jung ; Min, Hye-Ki ; Kim, Myung-Soo ;
Analytical Science and Technology, volume 13, issue 5, 2000, Pages 616~623
The most common phthalate acid esters (8 compounds) and adipate were determined from water and sediment simultaneously. After liquid-liquid extraction with n-hexane for water and sonication extraction with dichloromethane for sediment, these were determined by the GC/MS with SIM mode. There were good linearities (above
) on the range of the 0.1-20 ng/ml (water) and 10-500 ng/g (sediment), and the detection limits of method were below 0.1 ng/ml and 10 ng/g for water samples and sediment samples, respectively. The method shows a good precision and accuracy for measurement of phthalates and adipate.
Homogeneous Enzyme-linked Binding Assay for Mistletoe Lectin I Based on the Mistletoe Lectin I/D-galactose Interaction
Rhee Paeng, Insook ; Lee, Eun Ah ; Chon, Chong Soon ;
Analytical Science and Technology, volume 13, issue 5, 2000, Pages 624~629
A simple and rapid homogeneous enzyme-linked binding assay for mistletoe lectin I(ML I) was developed using a coupled enzyme system of malate dehydrogenase (MDH) and D-galactose. A highly substituted MDH-galactose conjugate was prepared by employing an isothiocyanate method for formation of thiourea bond. In the presence of ML I, ML I inhibits the activity of the conjugate based on the ML I/D-galactose specific interaction. Thus, the concentration of ML I can be related to the homogeneous inhibition of the MDH-galactose conjugate. Using this method. ML I can be measured at the level of microgram per milliliter within 10 minutes.
Effects of Some Crude Drug Extracts on the Brain Neurotransmitters in the Ethanol-Treated Rats
Linh, Pham-Tuan ; Lee, Soon-Chul ; Kim, Young-Ho ; Hong, Seon-Pyo ; Song, Chang-Woo ; Kang, Jong-Seong ;
Analytical Science and Technology, volume 13, issue 5, 2000, Pages 630~635
The concentration of neurotransmitters in rat brain was determined by HPLC-ECD (electrochemical detection) method and the effects of methanol extracts of some crude drugs, such as Polygala Radix, Myristicae Semen, Zizyphi Semen, Acori graminei Rhizoma, Visci Herba, Liriopsis Tuber, Myrrha on the concentration of neurotransmitters in the ethanol-treated rat brain were investigated. By the administration of ethanol, dopamine (DA), 3, 4-dihydroxyphenyl acetic acid (DOPAC) and serotonin (5-HT) levels in frontal cortex and 5-HT level in hippocampus were significantly increased compared with the neurotransmitter levels in the brain of saline-treated rats. The
-aminobutyric acid (GABA) level in frontal cortex was decreased by the same treatment. There was a tendency that the DA level in frontal cortex and striatum of ethanol-treated rats were increased by the administration of crude drug extracts. Especially, Myrrha and Visci Herba significantly increased the DA level of frontal cortex in ethanol-treated rats, while they significantly decreased the 5-HT level in the same region of the brain. GABA level in striatum of ethanol-treated rats was significantly decreased by Myristicae Semen, Visci Herba and Myrrha. These results suggest that the tested crude drug extracts have selective interaction with neurotransmitters in specified region of central nervous system.
The Extraction and Derivatization of Organotins in Water Sample by Gas Chromatograph/Mass Spectrometer
Hong, Jee-Eun ; Lee, Kang-Jin ; Pyo, Hee Soo ; Park, Song-Ja ; Lee, Won ;
Analytical Science and Technology, volume 13, issue 5, 2000, Pages 636~645
A method is described for the determination of organotins in water samples by GC/MS. Optimized derivatization methods for ethylation and hydrogenation of organotins were surveyed according to various reaction conditions such as time, pH and concentration of reagents. The organotins were extracted with n-hexane in presence of 0.1% tropolone and hydrogenated with sodium borohydride. Extraction recoveries of organotins with hydrogenation were in the range of 61-112%. After ethylation, organotins in water samples were extracted by liquid-liquid extraction (LLE) and solid-phase extraction (SPE). Using LLE, extraction recoveries were in the range of 74-113%. The recoveries ranged from 61-97% in the case of SPE with styrene-divinylbenzene copolymers. Method detection limits of hydrogenated and ethylated organotins ranged from 0.05 to 0.5 ng/ml and from 0.02 to 0.05 ng/ml, respectively.
Photocatalytic Destruction of a Mordant Yellow-12 Using Rutile-
Kim, Chang Suk ; Choi, In Won ;
Analytical Science and Technology, volume 13, issue 5, 2000, Pages 646~651
The photocatalytic degradation of Mordant Yellow-12 (MY-12) was investigated using a UV-Visible Spectrophotometer and pH meter. The UV-Visible absorbance spectra of the MY-12 contaminated water before and after treatment were presented in figure. The decrease of absorbance occurs at the range of 250 and 450 nm, this result suggests that photocatalytic degradation involves destruction of the aromatic rings in this experiment. More than 32% of the MY-12 was decomposed after one hour in 26-W fluorescent lamp, whereas it was 17% and 24% respectively in 15-W and 21-W lamps. MY-12 was decomposed completely after three hours in 26-W fluorescent lamp. The destruction rate constants were calculated from the change of absorbance and pH.
Degradation of Humic Acids by Ozone/high pH, Ozone/Hydrogen Peroxide and Ozone/Hydrogen Carbonate System
Shin, Hyun Sang ; Kim, Kei Woul ; Rhee, Dong Seok ;
Analytical Science and Technology, volume 13, issue 5, 2000, Pages 652~658
Chemical degradation of aqueous humic acid by ozonation was studied with respect to the direct reactions of ozone and the indirect reactions due to its preliminary decomposition to secondary oxidant, OH radical. This was characterized by analyzing TOC,
and ozone consumption measured in different experimental conditions in which ozone reacted in the presence of various concentrations of
concentrations ranging from 20 to 100 mg/L. and different pH (5-9). The results suggest that the TOC removal is mainly dependent on indirect reactions of OH radical whereas
reduction is mainly dependent on direct reactions of ozone with humic acid molecules. It has been also found that ozone consumption was most likely to be affected by pH and alkalinity in the solution.
Formation of Hydrogen Peroxide by the Ozonation of Aqueous Humic Acid
Kim, Kei Woul ; Rhee, Dong Seok ;
Analytical Science and Technology, volume 13, issue 5, 2000, Pages 659~665
The changes in
and concentrations of
formed by ozonation of aqueous humic acid in ozone/high pH, peroxone process and in the presence of radical scavenger,
were investigated. This study confirmed that the formation of
by ozonation may undergo different reaction pathways compared to those of
reduction in the degradation of the humic acid. The concentration of
produced by ozonation was found to be increased with decreasing pH of the sample solution due to the higher stability of ozone molecules at acidic conditions. On the while,
reduction was found to be higher at alkaline conditions or larger amount of
additions as a radical promoter in which the producing of
radicals can be more favorable. From the results, it has been suggested that the formation of
by ozonation depends mainly on the direct reactions of ozone with humic acid molecules, while
reduction is affected by both the indirect reactions of the radicals and direct reactions of ozone with humic acid.
Determination of Polybrominated Biphenyls in Biota Samples Using Gas Chromatography/Mass Spectrometry
Hong, Jongki ; Baek, In-Girl ; Kim, Hyub ; Kim, Do-Gyun ; Seo, Jung-Joo ; Seo, Jong-Bok ; Park, Hyun-Mee ; Lee, Kang-Bong ;
Analytical Science and Technology, volume 13, issue 5, 2000, Pages 666~674
The present study describes an analytical method for the determination of polybrominated biphenyls (PBBs) in biota samples by gas chromatography-mass spectrometry (GC/MS). PBBs are extracted twice from 20 g samples with mixture solvent 40mL acetone and 80mL hexane using ultrasonic agitation for 20 min. Lipids in extracts are degraded by concentrated sulfuric acid and then PBBs are purified with Florisil column. The purified extracts are analyzed by GC/MS-selected ion monitoring mode for the quantitation of PBBs in biota sample. The overall recovery yields of PBBs range between 77 and 111% under these experimental conditions.
Certification and Quality Control of the Official Test Facilities of Dioxins in Korea
Jang, Seong-Ki ; Kim, Tae-Seung ; Lee, Won-Seok ; Chung, Young-Hee ; Choi, Doug-Il ;
Analytical Science and Technology, volume 13, issue 5, 2000, Pages 675~682
The concentration of dioxins from flue gases of municipal waste incineration facilities with capacities over 50 tons/day are regulated by the guideline:
for new facilities, and
for existing facilities and it will be strengthened to
until 2003 year. Dioxins from these incineration facilities have to be measured more than 2 times annually by the Official Test Facilities of Dioxins. Seven institutions have been certified so far as the Official Test Facilities of Dioxins. These facilities have to be evaluated by the quality control program provided by National Institute of Environmental Research every year. We reported the results of quality control test performed in 1999. Four institutions certified in 1998 sampled flue gases at stack of M incineration facilitiy and analyzed dioxins by Official Methods of Air Pollution. The isokinetic coefficients, the parameter for evaluation of sampling ability were excellent for all four institutions. They were 100.9%, 102.4%, 102.1% and 99.2%, respectively. The criteria required are as follows; resolution over 10,000, mass calibration within
, ion abundance ratio within 15%, and the recovery of 50-120%. As results, those institutions also met these parameters of Official Method of Air Pollution.
The Volatile Organic Compounds Released from PVC Food Wrapping Film at Normal Use Condition
Nam, Sung-Hyun ; Kim, Man-Goo ; Kwon, Young-Jin ;
Analytical Science and Technology, volume 13, issue 5, 2000, Pages 683~692
The volatile organic compounds emitted from food wrapping films when it was used at high temperatures. However, the testing method based on solvent extraction may not be suitable for determination of volatile organic compounds from food wrapping films. Therefore, thermal extraction device was investigated in the study for reflection of actual usage conditions at home and restaurant. In this study, PVC food wrapping films were exposed to normal use condition controlled from
and collected on sorbent trap. Then, emitted VOCs from the films were analyzed with On-column cryofocusing-GC/MS system. The major VOCs emitted from films were
paraffinic hydrocarbons, dimethylphthalate, alkylphenols, known as endocrine disrupting chemical, such as tetramethylbutylphenol, tert-butylphenol, and nonylphenol. The concentration of tetramethylbutylphenol emitted from PVC films was
, rapidly increased with temperature,