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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 8, Issue 4 - 00 1995
Volume 8, Issue 3 - 00 1995
Volume 8, Issue 2 - 00 1995
Volume 8, Issue 1 - 00 1995
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Studies on the Determination of Heavy Metal Ions by Flow Injection, the Photochemical Characterization and Polymerization of Eight-Coordinated Complex(Part I): Spectrophotometric Determination of Uranium and Thorium Ions by Flow Injection Analysis using Chrome Azurol S in the Presence of Surfactant
Chang, Choo-Hwan ; Kang, Sam-Woo ; Son, Byung-Chan ; Cho, Kwang-Hee ;
Analytical Science and Technology, volume 8, issue 1, 1995, Pages 1~7
Spectrophotometric determination of U(VI) and Th(IV) by Flow injection method is described. Chrome Azurol S forms water soluble complexes with U(VI) and Th(IV) in the presence of cethyltrimethylammonium bromide. The maximum adsorption of U(VI) and Th(IV) complexes are at 600nm with molar absorptivity of
and 611nm with molar absorptivity of
in acetate buffer medium having pH 5.0 and 5.5. The calibration curves of U(VI) and Th(IV) are linear over the range of 0.1~0.8ppm and the correlation coefficients are ca. 0.9960 and 0.9930 respectively. The detection limits(S/N) are 20ppb for U(VI) and 15ppb for Th(IV). The relative standard deviation are
for U(VI) and
for Th(IV). The sample throughput was ca.
The role of matrix modifier and for the determination of cadmium in blood by graphite furnace atomic absorption spectrometry
Yoo, Kwang-Sik ; Kim, Chang-Bok ; Kwon, Jin-Kee ;
Analytical Science and Technology, volume 8, issue 1, 1995, Pages 9~16
The low concentration of cadmium in the whole-blood was determined by graphite furnace atomic absorption spectrometry(GFAAS) after the sample was diluted five-fold by 1% Triton X-100, 2%
as matrix modifier and pyrocoated graphite tube with L'vov platform was tried remove the interferences of blood matrix and reduce the loss of volatility of cadmium at higher ashing temperature(
). The criteria for evaluating the accuracy and precision of this analysis was confirmed by analysis of interlaboratory comparison(Japan) and NIST SRM No. 909(Cd in Serum). The limit of the determination for cadium was 0.1ng/ml and the relative standard deviation(RSD) at 1.0ng/ml level was about 10% for the GFAAS.
Determination of 2-Mercapto-1-methyl-imidazole in Antithyroid Drug by Differential Pulse Polarography
Kim, Il Kwang ; Chun, Hyun Ja ; Lim, Soon Hwa ;
Analytical Science and Technology, volume 8, issue 1, 1995, Pages 17~23
The determination method of 2-mercapto-1-methyl-imidazole(MMI) in
lithium perchlorate solution has been investigated by the differential pulse polarography. The optimum conditions for the determination of MMI were as fellows; -0.9 volt(vs. Ag/AgCl) initial potential, 80mV pulse height, 2mV/sec scan rate, and medium mercury drop size. The calibration curve showed a good linearlity in the range of
and the detection limit was
. This method was applicable to the determination of MMI in thyroid drugs without interference from the additives.
Determination of Thioglycolic acid in the presence of Copper(II) by Adsorptive Stripping Voltammetry
Hong, Mi-Jeong ; Kwon, Young-Sun ;
Analytical Science and Technology, volume 8, issue 1, 1995, Pages 25~32
Determination method of trace thioglycolate has been studied by adsorptive stripping voltammetry. Copper(II)-thioglycolate complex is adsorbed at the hanging mercury drop electrode and stripped during cathodic scan. Electrolyte was used pH 6.5 phosphate and pH 9.5 borate buffer solutions. Optimal conditions were a copper(II) concentration
, an adsorption accumulation potential -0.2V, an adsorption accumulation time 60 sec and a scan rate 20mV/sec. A detection limit of
thioglycolate was obtained. The method was applied to the determination of thioglycolate in cold wave fluids and depilating creams.
A Selectivity Character for the Phase Transfer Reactions of Alcohols by Tetra-n-Butyl Ammonium Chloride
Jee, Jong-Gi ; Cboi, Won-Bok ; Lee, Kwang-Pill ;
Analytical Science and Technology, volume 8, issue 1, 1995, Pages 33~40
Only trace amounts of hydroxide ion can be extracted from aqueous phase into organic phase by Tetra-n-Butyl Ammonium Chloride(TBAC). Addition of small amounts of primary alcohols, particularly certain dials, dramatically changes the behavior of Phase Transfer Catalysis systems, and surprising amounts of base can be found in the organic phase. Quantitative measurements were carried out for the extraction amounts of primary alkoxides, secondary alkoxides, and diol anions into organic phase. On the other hand, the selectivity constants for extraction of primary alcohols and benzylalcohol could be separated to the equilibrium constants of the ion pairs such as
in the aqueous and organic phases and this distribution coefficients between phases on anions respectively. In a word, the colligated property for the selectivity of
is quaternary cation and
alkoxide ion could be discussed in more detail by using of the corresponding free energies to the various constants mentioned.
Fluorescence Signal Analysis of Mixed Rare Earth Elements by Nonlinear Fitting Method
Kim, Dukhyeon ; Shin, Jangsoo ; Song, Kyuseok ; Cha, Hyungki ; Lee, Jongmin ;
Analytical Science and Technology, volume 8, issue 1, 1995, Pages 41~45
To analyze mixed rare earth elements quantitatively a nonlinear fitting method was applied to laser induced fluorescence signals. Mixed flourescence signal of two elements, Sm and Eu were resolved independently and determined the concentration of these two elements simultaneously. It was found that detection limit for each element in the mixture was sub-ppb level which was the same as that of the single element sample. Additionally it was found that lifetimes of Sm and Eu extracted from the nonlinear fitting method is the same as in the single element cases.
Spectroscopic Characterization on the Aggregation Behavior of Pyronin G with Tetraphenylborate anion
Lee, Beom-Gyu ; Kim, Kang-Jin ;
Analytical Science and Technology, volume 8, issue 1, 1995, Pages 47~53
The aggregation of Pyronin G(
) with tetraphenylborate(
) anion has been investigated in aqueous solution by absorption and fluorescence spectrophotometries. The addition of 1,4-dioxane in aqueous solution of
dissociates the aggregates of PG-TPB due to the increased hydrophobicity of the mixed solvent as compared to pure water, and yields higher
momomer concentration than aqueous
solution. The aggregation is not observed in any organic solvents except in water. The absorption maxima of
are correlated relatively well with
funtion. But better linear relationship was obtained with
scale for alcohols.
Studies on Electroanalytical Chemistry for the Oxygen Adducted Tetradentate Schiff base Cobalt(III) Complexes in Pyridine Solution
Rim, Chae-Pyeong ; Chae, Hee-Nam ; Chjo, Ki-Hyung ; Choi, Yong-Kook ;
Analytical Science and Technology, volume 8, issue 1, 1995, Pages 55~62
Tetradentate Schiff base cobalt(II) complexes such as
, N-bis(salicylidene)-m-phenylendiimine; [
, N-bis(salicylidene)-p-phenylendiimine: [
], and oxygen adducted cobalt (III) complexes such as [
] and [
] in pyridine solutions were synthesized. It was identified that the oxygen adducted cobalt(III) complexes have hexacoordinated octahedral configuration with pyridine and oxygen from the measurement of elemental analysis, AA, IR spectra, and TGA. The redox processes were investigated for the oxygen adducted complexes in 0.1M TEAP-pyridine solution, using cyclic voltammetry on the glassy carbon electrode. The redox processes of oxygen adducted Co(III) complexes result in
A polymer pH-Selectrode Based on Tribenzylamine as Neutral Carrier
Park, Myon-Young ; Chung, Koo-Chun ; Cho, Dong-Hoe ; Lee, Kyeong-Jae ; Jeong, Seong-Suk ; Park, Sun-Young ; Kim, Tae-Hun ;
Analytical Science and Technology, volume 8, issue 1, 1995, Pages 63~68
For the preparation of pH-selectrode, tribenzylamine, polyvinylchloride, dioctylphthalate, sodium tetraphenylborate and tetrahydrofuran were mixed with 0.02, 0.62, 1.34, 0.02g and 10ml respectively, and added 1g of acetylene black, graphite, silicon carbide or tungsten carbide respectively to improve electric conductivity. The selectrodes of seven kinds were shown linear to hydrogen ion in the range of pH 2 and 9. The best electric conductor for preparation of pH-selectrode based on tribenzylamine as neutral carrier was acetylene black and responded potential of the selectrode to hydrogen ion was shown the values near to theoretical Nernstian slope at
. The interfering effects of the selectrode on hydrogen ion in the presence of alkali and alkaline earth metal ions were shown the better results with less error than glass electrode. The reproducibility and stability were good for use as a selectrode, especially in the presence of fluoride ion.
Fundamental Studies of Gas-jet Assisted Radio Frequency Glow Discharge Atomic Absorption Spectrometry
Choi, Seong-Kyu ; Kim, Hyo-Jin ;
Analytical Science and Technology, volume 8, issue 1, 1995, Pages 69~77
The instrumentation and operating characteristics of a gas-jet assisted radio frequency glow discharge atomic absorption spectrometry(RF-GDAAS) are studied. The roles of discharge power, pressure as well as gas flow rate on the sample loss rate and absorbance are described in this paper. Results show that the optimum discharge conditions depend on pressure and discharge power as well as on the gas flow rate. The gas flow rate plays as an important parameter in RF-GDAAS. Absorbance increases as the gas flow rate increase up to 600ml/min., and the optimum absorbance is obtained at the pressure of 3 mbar. The absorbance increases when the discharge power increases as expected, however, the instability of the system due to the heat might be the trade off factor. The linear calibration curves of Ni and Cr in stainless steel(BAS 461-468) and brass (KSS 1121-1126) are obtained with RF-GDAAS.
Ion-Selective Electrodes for the Determination of Alverine
Lee, Eun-Yup ; Kim, Ki-Myo ; Kim, Sung-Jin ; Hur, Moon-Hye ; Ahn, Moon-Kyu ;
Analytical Science and Technology, volume 8, issue 1, 1995, Pages 79~84
Ion-selective poly(vinyl chloride) membrane electrodes for the determination of the anticholinergic drug alverine in pure substances is described. Ion-pair complex of alverine with anionic counter ion acid red 97 is investigated as electroactive compound for the electrode membrane. On the optimal composition of membrane, its slope was 55.35mV/decade, relative standard deviation was 0.61 and lower limit of linear range was
. The observed potentiometric selectivity coefficient was -2.625 toward methylephedrine and -2.216 toward histidine. We can got the stable potential at pH 7.0~4.0. Response time was 20~30 seconds for solutions
, about 10 seconds for solutions
of these compounds.
Electrochemical Corrosion Characteristics of the Iron-based Damping Alloy
Shim, Hyun Yee ; Jee, Choong Soo ; Lee, Jin Hyung ; Lee, Kyu Hwan ; Shin, Myung Chul ;
Analytical Science and Technology, volume 8, issue 1, 1995, Pages 85~90
Corrosion characteristics of 4 kinds of the Fe-Al damping alloys has been studied in the 3.5% NaCl solution and compared with a cold rolled mild steel and pure Ti, No passivation, besides Ti, was observed in the Fe-Al damping alloys and a cold rolled mild steel. Corrosion rate was decreased with lower carbon concentration. In the case of Mn addition for improving damping capacity, corrosion rate was decreased in scrap iron but was not decreased in electrolytic iron. It has been shown that corrosion rate of Fe-Al damping alloys lays between that of the pure Ti and that of a cold rolled mild steel.
A Study on the Lime Stabilization of Livestock Waste
Kim, Hyun-Chul ; Choi, Yong-Su ;
Analytical Science and Technology, volume 8, issue 1, 1995, Pages 91~99
One of alternative conventional technologies used for treatment of livestock wastes is composting process, and recently some mechanical composting processes are being practiced. It is, however, recognized the composting process also has its own limitations such as longer time requirement, and difficulties to estimate the degree of decomposition, etc. The incomplete compost contains potentially harmful materials to crops and public health due to instabilized organic contents and pathogenic organisms. The purpose of this investigation is to develop an innovative system whereby anxious livestock wastes are thoroughly stabilized and disinfected. Thus the overall management scheme should meet the following requirements. 1. A system should be in a cost-effective and environmentally sound manner. 2. Sludges must be chemically stabilized and bacteriologically safe. 3. Odor-free by product should be applied to crop land. 4. Sludges are sources of fertilizer nutrients and/or soil amendments to enhance crop production. 5. And they can be used as potential pH adjusting agent of the acidified soils. Overall effectiveness of the developed system is experimentally tested to satisfy the preset criteria and requirements. Major experiments are divided into four categories: they are 1. chemical stability test, 2. optimal condition test of stabilization process, 3. bacteriological examination and disinfection tests, and 4. deodorization tests The stabilization process is consisted of the stabilizing reaction process and the drying process. Stabilized wastes is dried by both sun dryer and rotary dryer. It is shown that an additive dosage of about g/kg solid in wastes with a minimum of 5-minutes reaction would be necessary for effective stabilization reaction. The stabilization process is consisted of the stabilizing reaction process and drying process. Stabilized wastes are dried by both sun dryer and rotary dryer. It is shown that an additive dosage of about 300g/kg solid in wastes with a minimum of 5-minutes reaction would be necessary for effective stabilization reaction. In the stabilization reaction process, the pH of wastes is lowered from initial values of 12.3 to 8.6. High pH prevents odor production and kills pathogenic organisms. Organic matter contents in the stabilized wastes are about 50% and the sum of contents of fertilizer elements such as total nitrogen,
are about 5.3%. The livestock wastes that are stabilized chemically and hygienically can be used as a good soil conditioner and/or organic fertilizer.
Determination of Zinc in the Scalp Hair of the Reumatoid Arthritis Patients
Kim, Jung Ae ; Park, Sang Min ; Lee, Won ; Choi, Beom Suk ;
Analytical Science and Technology, volume 8, issue 1, 1995, Pages 101~105
The concentration of zinc of the Reumatoid Arthritis patients has been determined by ICP-AES, and the analytical results are discussed. It is observed that the zinc concentration is largely affected by the length of scalp hair. The concentrations of zinc in the distal end are much higher than that of the proximal end.