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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 12, Issue 6 - 00 1999
Volume 12, Issue 5 - 00 1999
Volume 12, Issue 4 - 00 1999
Volume 12, Issue 3 - 00 1999
Volume 12, Issue 2 - 00 1999
Volume 12, Issue 1 - 00 1999
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Determination of Free Acid in U(VI)-Al(III) Solutions by Gran Plot Titration
Suh, Moo-Yul ; Lee, Chang-Heon ; Sohn, Se-Chul ; Kim, Jung-Suk ; Kim, Won-Ho ; Eom, Tae-Yoon ;
Analytical Science and Technology, volume 12, issue 3, 1999, Pages 177~183
The determination method of free acid in spent U-Al nuclear fuel solutions by Gran plot titration was described. Effect of U(VI) and Al(III) on the alkalimetric titration of nitric acid was investigated in oxalate complexing media as well as in noncomplexing media. Positive biases were observed in both titration media when the end-point was estimated by the Gran plot method. It was found that the cause of the bias was U(VI) in the oxalate complexing media, but Al(III) in the noncomplexing media. The relative error was less than 1% in the titration of 0.1 M
at a U(VI) : Al(III) :
mole ratio of up to 2:12:1 as long as the pH of the oxalate titration media was sustained to be below 5.0 at the beginning of titration. The method was successfully applied to the determination of nitric acid in a solution of HANARO reactor fuel with U:Al mole ratio of 1:6.
NMR and Cyclic Voltammetry Studies on the Interaction of Vanadate and N-Benzyliminodiacetate in Aqueous Solution
Park, Chul-Jin ; Park, Sam-Su ; Lee, Man-Ho ;
Analytical Science and Technology, volume 12, issue 3, 1999, Pages 184~189
NMR and cyclic voltammetry studies on the interaction of vanadate and N-benzyliminodiacetate (Bz-IDA) in aqueous solution have been studied. From the NMR spectra two
NMR peaks resulting at -515.5 and -500.1 ppm, due to the complexations between vanadate(V) and Bz-IDA at pH 5. has been observed. From the cyclic voltammograms the reduction-oxidation of the vanadate(V) complex has been found to be one-electron reaction.
Evaluation of Testosterone Metabolites/Dehydroepiandrosterone As the Indicators of Testosterone Administration in Horse Doping
Kim, Jin Young ; Choi, Man Ho ; Kim, Sung Jean ; Kyong, Jin Burm ; Chung, Bong Chul ;
Analytical Science and Technology, volume 12, issue 3, 1999, Pages 190~195
The metabolism of testosterone (
-hydroxy-androst-4-en-3-one) was confirmed in horse after a single intramuscular administration of testosterone cypionate (750 mg). Solvent extracts of urine obtained with enzymatic hydrolysis and methanolysis were analyzed by GC/MS after oxime t-butyldimethylsilyl (oxime-TBDMS) derivatization. The structures of four urinary metabolite after testosterone administration in horse were determined based on EI mass spectra and
-ol-17-one as major was confirmed with authentic standard. Also the concentrations of
-diol, dehydroepiandrosterone (DHEA),
-ol-17-one and testosterone were determined in the urine of normal subjects and the urine after administration. The recovery and detection limit in the most drugs were 86.3~94.7% and 1~3 ppb, respectively. Correlation coefficients for calibration were in the range of 0.984~0.999. Excretion profile of testosterone presents the rapid and large increasement up to maximum values at days 5 after administration and the slow regression. The relative ratios of testosterone, its metabolites over DHEA were determined for indication of testosterone administration in horse doping.
Removal of Heavy Metals, Cd(II) and Pb(II) Ions in water by Sargassum Herneri
Park, Kwang-Ha ; Park, Mi-A ; Jang, Hoon ; Kim, Eun-Kyung ; Kim, Young-Ha ;
Analytical Science and Technology, volume 12, issue 3, 1999, Pages 196~202
Brown algae, Sargassum horneri, was used as an adsorbent to remove heavy metal Cd(II) and Pb(II) ions. Sargassum horneri picked in East Coast was formulated into the grain with the size of 40-60 mesh after wind dry. Batch method was used in order to investigate the adsorption rate by measuring the adsorption amounts with shaking time. In the column method, the adsorption amounts were measured by flowing metal solutions into the algae-packed column at the rate of 1 ml/min. Adsorption amounts in both batch method and column method were in the following order : pH 10.5>7.0>3.5. It was found that Pb(II) was more adsorbed on the algae grain than Cd(II). It was also revealed that the adsorption amounts reached the maximum within 5 minutes irrespective of pH condition in the batch method. It was concluded that the batch method was more effective than the column method in terms of recovery rate.
Ion-Pair High Performance Liquid Chromatographic Retention Behavior of Salicylic Acid and Its Derivatives
Lee, Kangwoo ; Chung, Yongsoon ; Oh, Sangkeun ;
Analytical Science and Technology, volume 12, issue 3, 1999, Pages 203~208
The ion-pair high performance liquid chromatographic elution behavior of salicylic acid and its derivatives was studied with measuring capacity factor, k', changing the concentration of ion-pairing reagent (tetrabutylammonium chloride, TBACl) in mobile phase. As a result, it was found that k' of the samples increase at pH 7.2 as the TBACl concentration increases. The derivatives of salicylic acid were separated each other at an optimum mobile phase condition which was found from the observation of the retention behavior. The optimum mobile phase condition was methanol solution(
30:70) containing 20 mM TBACl for the determination of salicylic acid and methanol solution(
20:80) containing 40 mM TBACl for p-aminosalicylic acid at pH 7.2. The method has been applied for the analysis of the contents of salicylic acid derivatives in an aspirin tablet and a tuberculosis curing agent.
A Study on the Photocatalytic Dimerization of Rose Bengal and Thiourea
Yoon, Kil-Joong ;
Analytical Science and Technology, volume 12, issue 3, 1999, Pages 209~217
To elucidate the decay of the rose bengal (RB) sensitized and thiourea (TU) supersensitized photocurrent, spectroscopic analyses of the dye solution were performed. Absorption and fluorescence spectroscopic analyses of sensitizing solution before and after irradiation enabled to conform the new mechanism of the photocatalytic dimerization between RB and TU. And it was also found that the geometrical arrangement of the transition dipole moment is oblique and the angle between the dipoles is
in the dimer of dye molecules.
Disposable Type Electrochemical Ethanol Sensor
Kim, Moon Hwan ; Yoo, Jae Hyun ; Oh, Hyun Joon ; Cha, Geun Sig ; Nam, Hakhyun ; Park, Sung Woo ; Kim, Young Man ;
Analytical Science and Technology, volume 12, issue 3, 1999, Pages 218~223
A single use, screen-printed sensor for the measurement of liquid phase ethanol was developed and its electrochemical performance was investigated. Disposable type edthanol sensor was fabricated by serially screen printing the carbon paste, silverd pasted and insulator inlon a polyester substrate to pattern working and reference electrode sites and electrical contact. Alcohol dehydrogenase(ADH) or alcohol oxidase(AOD) together with appropriate electron transfer mediators was immobilized on the working electrode. To improve the sensitivity and reproducibility of carbon paste electrode, some pretreatment procedures were applied and their resultant electrochemical performance was examined. The disposable type electrochemical ethanol sensor developed in this study conveniently determines the ethanol in liquid samples such as blood and in fermentation process.
Study of Characteristic of Up-hill Transport in Alkali Metal-ions Through a Carrier Membrane
Park, Keunduck ; Yang, Wongkang ;
Analytical Science and Technology, volume 12, issue 3, 1999, Pages 224~229
Recently, many studies for the supported liquid membrane (SLM) using a carrier have been actively reported. Polymeric cation exchange membrane was synthsized by dissolving monensin carrier of antibiotic material in organic solvent. Then the SLM was applied to the Nernst-Planck and Fick equations and membrane potential and membrane permeability were measured respectively. The results showed the high selectivity towards alkali metal ions and the SLM showed linear relationship with low concentration. However, linear relationship did not appear at high concentration. This is explained by means of the new theory of the stagnant layer and the slop of logarithm value was linear for the up-hill transport phenomena of membrane transport.
Chemical Factors on the Homogeneous Precipitation of Barium Titanyl Oxalate by Dimethyl Oxalate and Their Effects on the Charateristics of Barium Titanate
Ryu, Kyoungyoul ; Huh, Wooyoung ; Lee, Chul ;
Analytical Science and Technology, volume 12, issue 3, 1999, Pages 230~234
Barium titanyl oxalates (BTO) has been homogeneously prepared by thermal decomposition of dimethyl oxalate (DMO) in hydrochloric solution containing
. Particles of BTO settled on the bottom of the beaker were collected at the aging time of 120 min using hydroxy propyl cellulose (HPC) as a dispersant. The reaction temperature, the concentration ratio of
and the existence of HPC were found to influence on morphologies of BTO, chemical yields and characteristics of barium titanates formed from their precursors.
Measurement of the Phase Fraction of Minor Precipitates in Ni Base Superalloys using Quantitative X-ray Diffraction Technique
Kim, S.E. ; Cho, C.C. ; Hur, B.Y. ; Na, Y.S. ; Park, N.K. ;
Analytical Science and Technology, volume 12, issue 3, 1999, Pages 235~242
It is impossible to measure the fraction of the precipitates which are neither plenty nor distiguishable on micrographs, using point counting method or image analyzer. In this study, phase fraction of sigma, carbide and boride which are important to mechanical properties of Ni base superalloy Udimet 720 has been measured using a quantitative X-ray diffraction technique combined with electrochemical extraction. The alloys had been exposed at
for various times up to 3000 hours to have a variation of the amount of the minor precipitates. The amount of sigma had increased exponentially with increasing exposure time up to 3000 hours before saturation. It can be argued that the finishing point of precipitation is around 5000 hours and maximum amount of sigma to be produced is about 5% in weight. The amounts of
were maintained constant at the level of 0.1~0.5% in weight, regardless of exposure time.
Identification of Buza by Detecting Aconitine-type Alkaloids
Eom, Dong-Ok ; Ban, Tae-Hwan ;
Analytical Science and Technology, volume 12, issue 3, 1999, Pages 243~247
After aconitine-type alkaloids have been isolated from the crude drug "Buza" as the precipitate, they could be identified with colour test, UV/Vis. absorption wavelength, TLC. The presence of aconitine-type alkaloids are confirmed by the reaction with the Reineke ion,
, and TCR ion,
, to produce the white precipitate or one of the containing from blue to yellowish blue. It is based on the formation of complex compounds by aconitine-type alkaloids with Reineke and TCR reagent. The method has been found to be simple, convenient and suitable for routine identification of aconitine-type alkaloids, related basic compounds, the crude drug "Buza" processed from the roots of certain Aconitum spp. plants(Ranunculaceae).
Analysis of Octylphenol, Nonylphenol, Di-octylphthalate in Sewage Sludge by GC/MS-SIM
Kim, Jong-Hun ;
Analytical Science and Technology, volume 12, issue 3, 1999, Pages 248~255
Sewage sludge samples were extracted with dichlomethane by Soxhlet extraction. The extracts were analysed for the endocrine disrupting compounds (EDC), octylphenol(OP), nonylphenol (NP) and bis (2-ethylhexyl)phthalate (DOP) using GC/MS-SIM. In industrial sewage sludge (sample Z-1) the concentration of NP and DOP were respectively
whereas in domestic sludge (sample Z-2) the concentration were respectively
. OP was not detected in Z-2, but detected a small amount in Z-2 of the samples. Environmental EDC have been shown to affect the fertility of range of living organisms, including humans, and the high levels of NP and DOP in industrial sewage sludge could have serious implications for the reproductive health of humans particularly if the compounds entered the human food chain through water or the ingestion of vegetables or animal products.
Analysis on Enzymatic Browning in Pine Needles
Kong, Kwang-Hoon ; Park, Hee-Joong ; Choi, Sang-Sook ; Cho, Sung-Hye ; Kim, Yong-Tae ;
Analytical Science and Technology, volume 12, issue 3, 1999, Pages 256~259
Tyrosinases are related to the enzymatic browning of plants and attract the major scientific interest for the prevention of it. Three tyrosinase isozymes (
) from pine needles were purified to homogeneity and characterized the factors that affect their activities. The L-ascorbic acid and
-mercaptoethanol notably inhibited the enzymatic activities of the three isozymes. The sodium diethyldithiocarbamate was a competitive inhibitor of isozymes with the
(0.015 mM) and
(0.019 mM), respectively. Their enzyme activities were however, increased by the addition of most metal ions. The optimum pH for the three isozymes was 9.0~9.5 and the optimum temperatures ranged from 55 to
using L-DOPA as substrate.
Quadruplex Genotype Analysis at HumTH01, HumTPOX, HumCSF1PO and Amelogenin Loci by FoLT-PCR
Lee, Yang-Han ; Lim, Si-Keun ; Kang, Pil-Won ; Choi, Dong-Ho ; Yoon, Song-Ro ; Han, Myun-Soo ;
Analytical Science and Technology, volume 12, issue 3, 1999, Pages 260~264
A simple and rapid procedure, called FoLT-PCR(Formamide Low Temperature-Polymerase Chain Reaction) was applied to amplifying DNA directly from various forensic biological evidences including human blood, saliva, hair root, or semen without any DNA preparative steps. We added washing step with non-ionic detergent, 1% Triton X-100, and used Taq DNA polymerase instead of Tth DNA polymerase to amplify 3 STR loci and gender allele simultaneouly. Optimal concentration of formamide and annealing temperature were determined empirically to 8%(v/v), and
respectively. We also compared this method with standard PCR.
Review : Measurement and Analysis of Dioxins
Sin, Seon-Gyeong ;
Analytical Science and Technology, volume 12, issue 3, 1999, Pages 265~265