Go to the main menu
Skip to content
Go to bottom
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 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
Selecting the target year
Analysis of Cadmium in Urine using Flame and Flameless Atomic Absorption Spectrophotometry
Ham, Yong-Gyu ; Lee, Seok-Ki ; Jeon, Jae-Hong ; Joung, Chang-Ung ; Son, Bu-Soon ;
Analytical Science and Technology, volume 12, issue 5, 1999, Pages 355~359
Trace cadmium was determined in urine by flame and nameless AAS. Inflame method, cadmium was extracted into MIBK from Cd-DDTC complex. In flameless method, samples were pretreated with 1%, Triton X-100. 1%
and matrix modifier
. Analysis of cadmium was, performed at
ashing temperature by use of pyrocoated tubes. Results of analysis, flameless method superior in sample treatment and reproducibility to flame method and highest absorbance was obtained at
ashing temperature. 100 mg/L
concentration. Proposed method were applied to the determination of cadmium in standard urine Lononorm-Metalle 3.
A Study on the Adsorption Kinetics of the Heavy Metals, Cd(II) and Pb(II) Ions by the Uiva Pertusa and Hizakia Fusiformis
Park, Kwang-Ha ; Park, Mi-A ; Kim, Ki-Hong ; Kim, Young-Ha ;
Analytical Science and Technology, volume 12, issue 5, 1999, Pages 360~369
In this research, a study of adsorption kinetics of heavy metal ions on the Ulva pertusa and Hizakia fusiformis which is aiming at removing metal ions from water or every kind has been carried out. During the process of this research. Adsorption kinetics of Cd(II) and Pb(II) ions by the Ulva pertusa and Hizakia fusiformis, within five minutes reached at the maximum adsorption amount. The adsorption amoum by Ulva pertusa was more than the other. Adsorption ratio by Ulva pertusa were 15.0~100% of Cd(II) and 39.2~82.5% of Pb(II). Adsorption ratio by the Hizakia fusiformis were 18.3~100% of Cd(II) and 56.4~94.7% of Pb(II). Additionally, recovery ratio or Cd(II) from the Ulva pertusa presents 75.0~83.6% and that of Pb(II) ions presents 79.1~85.5%. Also, recovery ratio of Cd(II) from Hizakia fusiformis fusiformis were 66.7~85.0% of Cd(II) ions and 77.6~83.9% of Pb(II) ions respectively. As a result of this research. adsorption amount of Cd(II) and Pb(II) ions by Ulva pertusa was more than it by Hizakia fusiformis.
Separation of High Purity Terbium Using Extraction Chromatography
Lee, Kwang-Pill ; Park, Myoung-Jin ; Park, Keung-Shik ; Lee, Hueng-Lark ; Piao, Zhexiu ;
Analytical Science and Technology, volume 12, issue 5, 1999, Pages 370~374
Extraction chromatography was used to scarch optimum separation conditions of terbium. Stationary phase was 2-ethylhexyl-2-ethylhexyl phosphonic acid(HEH[EHP])levextrel (-100~+150 mesh), column size was
and kept constantly temperature at
, adsorption flow rate of
, elution flow rate of
, column diameter to packing height of 1:15. But to search optimum separation conditions of terbium, it changed the eluent acidity, the loading weight of sample. the composition of sample. In conclusion, acidity was 0.6 N HCl, loading weight of sample was about 5% and composition of sample was
. Moreover purity of separated terbium by ICP-AES analysis was 99.98% in yield of 99.99%.
Fundamental Investigation of Non-invasive Determination of Alcohol in Blood by Near Infrared Spectrophotometry
Chang, Soo-Hyun ; Cho, Chang-Hee ; Woo, Young-Ah ; Kim, Hyo-Jin ; Kim, Young-Man ; Lee, Kang-Boong ; Kim, Young-Woon ; Park, Sung-Woo ;
Analytical Science and Technology, volume 12, issue 5, 1999, Pages 375~381
Near infrared spectrophotometry(NIR) was developed as a non-invasive determination of blood alcohol. The first pure alcohol/water samples were prepared with ethanol concentration from 0.01 to 0.1%(w/w). Analysis of the second-derivative data was accomplished with multilinear regression(MLR). The standard error of calibration(SEC) of ethanol in ethanol/water solutions was approximately 0.0039%. The calibration models were established from the blood alcohol spectra by MLR and PLSR analysis. The best calibration was built with the second-derivative spectra of 2266 and 2326 nm by MLR. Second-derivative spectra in the spectral ranges of 1100~1340, 1500~1796 and 2064~2300 nm with four PLSR factors provided the standard error of prediction(SEP) of 0.030%(w/w). These results indicate that NIR may be applied for a fast non-invasive determination of alcohol in the blood.
Homogeneous Preparation of Barium Titanate by Dimethyl Oxalate in Ethanol Solution
Ryu, Kyoung-Youl ; Lim, Myoung-Hee ; Huh, Woo-Young ; Lee, Chul ;
Analytical Science and Technology, volume 12, issue 5, 1999, Pages 382~386
Spherical particles of barium titanyl oxalate(BTO) were homogeneously precipitated by thermal decomposition of dimethyl oxalate in hydrochloric mixture solutions of water and ethanol. The experimental parameters such as composition of the mixture solvents. the eoncentration of hydrochloric acid and reaction temperature had the paramount effect on the size of panicles collected from the bottom of the reaction vessel at the aging time of 120 min and the composition of BTO. Stoichiometric BTO powders were obtained under certain conditions as relatively low alcohol content in the mixtures, high chloride concentration and high temperature, Monosized, submicrometer, but titanium excess particles were obtained under certain reverse conditions.
A Study on the Retention Behavior of Co(II)-Dithiocarbamate Chelates in Reversed Phase-High Performance Liquid Chromatography
Lee, Won ; Kim, Eun-Kyung ; Ann, Hye-Sook ; Lee, Jung-Han ;
Analytical Science and Technology, volume 12, issue 5, 1999, Pages 387~396
The retention behavior of Cot(II)-dithiocarbamate(DTC) chelates in reversed phase high performance liquid chromatography was investigated. Enthalpy and entropy of chelates transfer from the mobile phase to the stationary phase were calculated from retention data using van't Hoff plots. The dependence of In k' on enthalpy was decreased with increasing organic solvent ratio on the mobile phase. The compensation temperatures(
) calculated from the slope of
vs In k' were in the range of 756.3-888.5 K. From these results. it was found that the retention mechanism of DTC chelates was invariant under the various temperatures and was largely affected by the solvophobie effect. Liniear relationship between S index and log k' in emprical retention equation,
showed that S index was influenced mainly by the interaction between DTC chelates and the mobile phase.
Stability Constants for Transition Metal ions of Hexadentate
Ligands Containing Two Pyridyl Groups
Kim, Sun-Deuk ; Kim, Jun-Kwang ; Park, Yoon-Yul ;
Analytical Science and Technology, volume 12, issue 5, 1999, Pages 397~402
The open-chain hexadentate
, ligand containing two pyridyl groups, 1,15-bis(2-pyridyl)-2,6,10,14-tetraazapentadecane (bpyped) has been synthesized as its tetrahydroehloride salt and characterized by EA, IR, NMR, and Mass. Its proton dissociation constants(
) and stability constants (
) for Co(II), Ni(II), Cu(II) and Zn(II) ions were determined at
and ionic strength 0.10 M(
) in aqueous solution by potentiometry and compared with those or analogous
ligands contain one or two propylenic spacers, which make six-membered chelate rings, between the aliphatic nitrogen atoms.
Analysis of the Contents in Stabilized Chlorine Dioxide
Shin, Ho-Sang ; Oh-Shin, Yun-Suk ;
Analytical Science and Technology, volume 12, issue 5, 1999, Pages 403~407
A method for detecting chlorine dioxide in drinking water was developed by the modified iodometric titration. This method requires prior removal of interfering chemicals such as chlorine and/or other oxidants: the interferents are removed by
purging. Chlorite and chlorate were successfully quantified by the ion chromatography-conductivity detection. Stabilized chlorine dioxide that is commercially available contained only traces of chlorine dioxide (0.01-0.09%). In reality, its main component is chlorite.
Determination of the Homocysteine, Cysteine and Methionine in Human Plasma by Gas Chromatography with Electron Capture Detector
Myung, Seung-Woon ; Chang, Yoon-Jung ; Yoo, Eun-Ah ; Park, Joon-Ho ; Min, Hye-Ki ; Kim, Myung-Soo ;
Analytical Science and Technology, volume 12, issue 5, 1999, Pages 408~414
A selective and sensitive method for the derivatization of total homocysteine (Hcy) and the related compounds in plasma by gas chromatograph (GC)-electron capture detector (ECD) has been developed. To determine total homocysteine, cysteine (Cys), and methionine (Met) in human plasma using GC-ECD, analytes were reduced and converted into their N(O,S)-ethylearbonyl pentafluoropropyl (PFP) ester by derivatization with ethyl chloroformate and pentafluoropropyl alcohol (PFP-OH) in plasma. The best derivatizing agent N(O,S)-ethyl carbonyl PFP ester, was chosen by comparing the sensitivity of derivatized analysis in GC-ECD. The derivatized analytes in plasma were extracted by chloroform, and subsequently back-extracted with hexane and analyzed by GC-ECD. The calibration carves (
> 0.990) were linear over the range
of Hcy and Met,
of Cys spiked in plasma. The detection limit observed by the established method was below
. This method is highly sensitive and specific in the analysis of Hcy, Cys, and Met. Therefore, we suggest that this method is appropriate in the analysis of trace concentration of Hcy, Cys, and Met in biological fluids.
Quantification of the Scum on the Black Matrix Surface of Color Filter for LCD
Koo, Young-Mo ; Lee, Jong-Seo ; Yi, Choong-Hoon ;
Analytical Science and Technology, volume 12, issue 5, 1999, Pages 415~420
We estimated the quantity of the scum remaining on the Black Matrix (BM) surface of color filter. To do this, histogram was analyzed which was obtained from AFM image of the BM surface. We divided the histogram to two Gaussian functions of the free BM surface (1) and the scum (2), and calculated the areas (
) of both the Gaussian functions. We quantified the residue as the ratio of the area (
). As a result of the Gaussian functions of the free BM surface, it was revealed that another kind of residue remained on the BM surface. It was difficult to quantify it. but it could relatively be estimated from the average height and the standard deviation.
Cobalt(II) Complex of 1,2-Bis(2,2'-bipyridyl-6-yl)ethane. Crystallization Process and Structural Analysis of Two Shapes of Crystals
Park, Sung-Ho ; Yoo, Kyung-Ho ; Jung, Ok-Sang ;
Analytical Science and Technology, volume 12, issue 5, 1999, Pages 421~427
Two shapes of crystals have been isolated by the interdiffusion of
dissolved in methanol with 1,2-bis(2,2'-bipyridyl-6-yl)ethane (bbpe) dissolved in chloroform. The two crystals have been elucidated as
, by X-ray crystallography, elemental analysis, IR, and thermal analysis. The two molecular structures are very similar except for the absence or presence of chloroform solvate molecules. The bbpe ligand coordinates to the cobalt(II) ion in an open-ended tetradentate mode, resulting in discrete mononuclear cobalt(II) complex. The cobalt atom adopts a typical octahedral arrangement with six nitrogen donating atoms with two NCS groups in trans positions. A significant solid-to-solid phase transition occurs presumably due to the change of conformationally flexible bbpe ligand. The formation of both crystals oeeurs in a successive two-step process, the formation of
and its transformation into
. The thermal stability and favorable formation of the solvate crystals may be ascribed to the interaction between S atom of NCS group and Cl of chloroform.
A Study of the Rn-222 and Ra-226 Analysis in Aqueous Samples with a Low-Level Liquid Scintillation Counter and Pulse-Shape Analysis
Shin, Hyun-Sang ; Lee, Chang-Woo ; Lee, Myung-Ho ; Cho, Yung-Hyun ; Hong, Kwang-Hee ; Choi, Geun-Sik ;
Analytical Science and Technology, volume 12, issue 5, 1999, Pages 428~435
A method for measuring Rn-222 and Ra-226 in aqueous sample using liquid scintillation counting technique has been studied. The Rn-222 was extracted easily from the water sample (10 mL) by 12 mL of xylene based organic scintillant. After radioactive equilibrium between Rn-222 and its alpha emitting decay products for three hours, the alpha activity from Rn-222 and its decay products were measured in a scintillation vial using the Wallae
Quantulus liquid scintillation counter. Ra-226 concentration in aqueous sample was determined, after isolation of Ra-226 from the sample matrix, by extraction the ingrowth of the Rn-222 and its alpha emitting decay products with xylene based organic scintillant. The optimum pulse-shape analysis (PSA) value was evaluated by the figure of merit (FM) criterion. Minimum detectable activity (MDA) is about 0.14 Bq/L (3.78 pCi) for the region of Rn-222 and its alpha emitting decay products and 0.06 Bq/L (1.63 pCi) for the region of Po-214 respectively, with 200 min, counting time at PSA level 100 in the low-diffusion polyethylene vial and xylene based cocktail solution. Experiment on the optimum sample-cocktail volume ratio, the influence of agitation and the diffusion of radon from vial were carried out.
Antistatic Property and Crystalization Behavior of Polyester Fiber
Kim, Moon-Chan ; Lee, Cheal-Gyu ;
Analytical Science and Technology, volume 12, issue 5, 1999, Pages 436~440
Antistatic property and crystallization behavior of antistatic poly(ethylene terephthalate) (PET) were studied by feeding antistatic agents into polycondensation reactor. Glass transition and melting temperature of antistatic PET were decreased by poly(ethylene glycol) (PEG) component of antistatic agent. The crystallization rate of antistatic PET was inhibited by decreasing crystallization temperature. Thermal properties and crystallization behavior was affected POAG content of antistatic agent rather than sodium alkylsulfonate of it. The main antistatic component of antistatic agent was POAG. The main role of sodium alkylsulfonate was increasing melt viscosity of antistatic poly(ethylene terephalate) polymer.
Analysis of the Change of Amino Acids by Abscisic acid and Polyamine Treatment in Radish Young Cotyledons
Cho, Bong-Heuy ;
Analytical Science and Technology, volume 12, issue 5, 1999, Pages 441~446
The changes of amino acids in the cotyledons of spring - and winter radishes were analysed during the abscisic acid (ABA). ABA plus cycloheximide (CH) and ABA plus polyamine (PA) treatment. The total contents of amino acids were increased in spring radishes, and decreased in winter radishes by ABA. The contents of hydrophilic amino acids, proline, glycine, serine and cysteine in spring radishes (expecially proline), and of cysteine, leucine and phenylalanine in winter radishes (expecially cysteine and leucine)were increased, CH treatment resulted in the accumulation of amino acids by the inhibition of new synthesized protein, which synthesized against ABA induced dehydration both of radishes. On the contrary, the contents of amino acids were decreased in spring radishes, and increased in winter radishes during PA treatment. These results indicated that the accumulated hydrophilic amino acids and new synthesized proteins induced the adaptation of dehydration against stress and the role of ABA in accelerating of stress adaptation was mediated by polyamines.
Sonication in the Analysis of Hexavalent Chromium in Welding Fume
Yoon, Chung-Sik ; Paik, Nam-Won ; Kim, Jeong-Han ; Park, Dong-Uk ; Choi, Sang-Jun ; Kim, Shin-Bum ; Chae, Hyun-Byung ;
Analytical Science and Technology, volume 12, issue 5, 1999, Pages 447~459
A study was conducted to compare three analytical methods for determination of hexavalent chromium in the welding fume. Precision and accuracy arc documented for colorimetric, ion chromatographic, and inductively coupled plasma-optical emission spectroscopic method. Evidence is presented that welding fume can affect the oxidation of trivalent chromium. A simple sonication extraction method, proposed in this study, instead of hot alkaline extraction has the advantage of minimizing the potential for chromium oxidation.
Kinetic Studies of Chromium-Oxygen Complex
Won, Tae-Jin ; Lee, Yong-Ill ; Kim, Dong-Won ;
Analytical Science and Technology, volume 12, issue 5, 1999, Pages 460~463
The kinetics for the reaction of superoxo chromium(III),
and glutathione(GSH) have been studied spectrophotometically in aqueous solution. Because the reaction is slow under our experimental conditions the initial rate method is used. Also the reaction fit in second order kinetics. Glutathione is oxidized by chromium complex containing oxygen. The rates of reactions depend on the presence of alcohol(MeOH or 2-PrOH) and oxygen. From these observations it is suggested the real oxidant for glutathione is not superoxo chromium,
Review : Resolution of Optical Isomers by Gas Chromatography and Chirality of Drug Metabolism
Sin, Ho-Sang ;
Analytical Science and Technology, volume 12, issue 5, 1999, Pages 464~464