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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 17, Issue 6 - 00 2004
Volume 17, Issue 5 - 00 2004
Volume 17, Issue 4 - 00 2004
Volume 17, Issue 3 - 00 2004
Volume 17, Issue 2 - 00 2004
Volume 17, Issue 1 - 00 2004
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Adsorption of Uranium(VI) Ion Utilizing Cryptand Ion Exchange Resin
Park, Seong-Kyu ; Kim, Joon-Tae ;
Analytical Science and Technology, volume 17, issue 2, 2004, Pages 91~97
Cryptand ion exchange resins were synthesized with 1-aza-15-crown-5 macrocyclic ligand attached to styrene divinylbenzene (DVB) copolymer with crosslink of 1%, 2%, 5% and 10% by substitution reaction. The synthesis of these resins was confirmed by content of chlorine, element analysis, and IR-spectrum. The effects of pH, time, dielectric constant of solvent and crosslink on adsorption of uranium (
) ion were investigated. The uranium ion was showed fast adsorption on the resins above pH 3. The optimum equilibrium time for adsorption of metallic ions was about two hours. The adsorption selectivity determined in ethanol was in increasing order uranium (
), magnesium (
), neodymium (
) ion. The adsorption was in order of 1%, 2%, 5%, and 10% crosslink resin and adsorption of resin decreased in proportion to order of dielectric constant of solvents.
Analytical Study for an Acrylic Coating
Kim, Seog-Jun ;
Analytical Science and Technology, volume 17, issue 2, 2004, Pages 98~107
In this study,
NMR spectroscopy and HPLC were used to identify the type and quantity of each component in an acrylic coating materials applied for an automotive part. By the
NMR analysis, it was found that this acrylic coating contained about 88.40 wt% of poly methyl methacrylate (PMMA), 7.05 wt% of methyl methacrylate (MMA), and 2.36 wt% of allyl methacrylate. Polymer additives such as a benzotriazole light stabilizer (Hisorb 328), an oxanilide light stabilizer, butylated hydroxy toluene (BHT), and dimethyl phthalate (DMP) were also identified and measured quantitatively from the
NMR spectra. However, only two light stabilizers were identified by reverse phase (RP) HPLC analysis using Bondapak C18 column, methanol mobile phase, and a PDA (Photodiode array) detector. The contents of two light stabilizers in the acrylic coating were measured by a quantitative analysis through UV-Vis spectroscopy and compared with the NMR data. The analytical informations from
NMR spetra were better than those from HPLC-PDA plot.
A Study on the Adsorption of Rare Earth Elememts by Raw and Crosslinked Chitosan
Cho, Sung-Ill ; Choi, Jong-Moon ; Kim, Young-Sang ; Lee, Sueg-Geun ;
Analytical Science and Technology, volume 17, issue 2, 2004, Pages 108~116
The adsorption characteristics of raw and crosslinked chitosan for rare earth elements (REEs) have been studied. The range of optimum pH for the maximum adsorption was observed: pH 4.5~5.5 for
on raw and crosslinked chitosan; pH 4.0~5.5 for
on crosslinked chitosan and pH 2.0 for those on raw chitosan. The adsorption rate of REE at pH 4.0 has been found in the order of
in single metal system and that of
in multi metal system. In the competitive adsorption of multi metal system, the amount of metal adsorption generally increased with increasing atomic number and with decreasing ionic radius. On the adsorption studies of metal ions on chitosan, the time of equilibrium adsorption which was reached at the maximum adsorption was about 5 hours. 83~95 % for
ion and 90~106 % for
ion, were recovered from the crosslinked chitosan.
Quantitative Analysis and Qualification of Amitrole Using LC/ESI-MS
Park, Chan-Koo ; Eo, Soo-Mi ; Kim, Min-Young ; Sohn, Jong-Ryeul ; Mo, Sae-Young ;
Analytical Science and Technology, volume 17, issue 2, 2004, Pages 117~129
Amitrole in environment, difficult to be analyzed by GC or GC/MS due to high polarity and low volatility, was analyzed by LC/ESI/MS in the study. Maximum peak intensity of amitrole in LC/MS/ESI mass spectrum is m/z 85 of protonated molecular ion
with 30V of cone voltage at SIR mode. It was confirmed that ratios between main ion of amitrole, 85 of protonated molecular ion, and m/z 58 fragmented ion of amitrole, had increased corresponding with the increment of cone voltage from 20V to 70V. The isotope molecular weight of amitrole was
at LC/MS analysis and the mass spectrum ratio between 85 mass and 86 mass was not different by the change of concentration but similar to theoretical ratio(less than 10% standard deviation).The linearity of standard calibration curve under same condition with sample treatment method had
. Recovery rates in water and soil samples were 77.64~83.44% and 71.11~79.44%, respectively. Reliability of the analysis was performed with 5 repeated measurements at each level of standard concentration and the result showed that relative standard deviation was less than 10%; therefore, the extraction and analysis method in the study suggested that it would be reliable to measure amitrole in water and soil media.
The study on the measurement of volatile organic compounds in the air of A and B industrial area
Shin, Ho-Sang ; Ahn, Hye-Sil ;
Analytical Science and Technology, volume 17, issue 2, 2004, Pages 130~144
Recently, the air pollution in A and B industrial area has become one of the most important issues, then 60 VOCs in the area were measured using a highly sensitive method. The VOCs were adsorbed onto Carbotrap using air sampler and subsequently desorbed by a thermal desorber system into gas chromatograph-mass spectrometry (TDS-GC-MS). The peaks of all compounds had good chromatographic properties and offered very sensitive response for the EI-MS (SIM). Method detection limits (MDL) ranged from 0.01 to 0.1 ppt(v/v), and linearities of calibration curves were over 0.995. We analyzed total 90 atmosphere air samples of A and B industrial complex using the method. Benzene, toluene, ethylbenzene, xylene, n-hexane, fluorotrichloromethane, carbon tetrachloride, 1,2-dichloroethane, 1,1,1-trichloroethane, trichloroethylene, tetrachloroethylene, styrene, 1,3,5-trimethylbenzene, 1,2,4-trimethylbenzene, sec-butylbenzene and naphthalen were identified as the major compounds in the air, and their average concentrations were 0.81, 5.02 1.30, 3.0, 0.81, 37.9, 0.07, 0.15, 0.15, 0.79, 0.06, 0.33, 0.03, 0.12, 0.23, and 0.35 ppb(v/v), respectively. The concentrations of VOCs were low in summer and high in fall or winter. When the concentrations detected in air compare with WHO's norm, no case exceed it.
Studies of gas chromatographic analysis of malodorous S compounds in air
Kim, Ki-Hyun ; Oh, Sang In ; Choi, Y.J. ;
Analytical Science and Technology, volume 17, issue 2, 2004, Pages 145~152
In this study, analytical characteristics of S gas detection technique were investigated against four major reduced S compounds (including hydrogen sulfide; methyl mercaptan; dimethyl sulfide (DMS); and dimethyl disulfide (DMDS)). To analyze such properties, an analytical system was constructed by combining the GC/PFPD system with the loop injection method. The results of our analysis indicated that response behavior of S gases differs greatly between compounds; H2S exhibited the weakest sensitivity of all compounds, while DMDS with two S-atom compounds the strongest sensitivity. To learn more about their response behavior on GC/PFPD method, their calibration patterns were compared using the three arbitrarily set concentration ranges of low, intermediate, and high. The results showed that calibration patterns of each compound are distinguished because of different factors. There was a line of evidence that calibration of
was affected noticeably by adsorptive loss within the system, whereas those of DMS and DMDS were influenced most sensitively by such factor as the linearity response at a given PMT voltage setting. The overall results of our study suggest that quantification of malordorous S compounds require a better knowledge of compound-specific response behavior against GC detection.
Preparation of a CRM for QA/QC in dioxin analysis and inter-laboratory study
Yu, Byeong-Woon ; Moon, Young-Hoon ; Kim, Min-Kwan ; Kyoung, Jong-Dai ; Chang, Yoon-Seok ;
Analytical Science and Technology, volume 17, issue 2, 2004, Pages 153~162
Dioxin CRM for QA/QC was prepared with fly ash collected from municipal waste incinerator. With that CRM inter-laboratory test was carried out. The collected fly ash was conducted several homogeneity steps including sievings and mixing. Homogeneity test and estimation of uncertainty was performed by one-way ANOVA based on ISO guide 35. Compared concentrations of fly ash of participants to CRM values, PCDDs value was lower than that of CRM in almost participants, and showed higher PCDFs concentration than that of CRM. Although there is a small difference in PCDD/Fs concentrations with congeners of extract, the result was close to mean value.
Molecular Size Fractionation of Soil Fulvic Acid by Gel Filtration Chromatography and Analysis of Their Fluorescence Characteristics
Chung, Kun-Ho ; Shin, Hyun-Sang ; Lee, Wanno ; Cho, Yeong-Hyun ; Choi, Geun-Sik ; Lee, Chang-Woo ;
Analytical Science and Technology, volume 17, issue 2, 2004, Pages 163~172
The molecular size distribution and fluorescence properties of soil fulvic acids (FA) were characterized by using gel filtration chromatography (GFC) and luminescence spectroscopy. The objectives of this work were to fractionate the FA extracted from a forest soil into different nominal molecular size using GFC system and to characterize the fluorescence properties (excitation, emission and synchronous) of these fractions using luminescence spectrometer. The GFC column was calibrated with polyethylene glycols, acetone and dextrane Blue. The total permeation volume of the GFC system was 404 mL and the void volume 130 mL. The GFC molecular weight of the soil FA was in the range of 190~8,900 Dalton and the molecular weight at the peak on the chromatogram was 930 Dalton. The fluorescence intensity ratio (
) was found to be increased with an increasing molecular weight. This results may suggest that the fulvic acid fractions with high molecular weight have large amount of the condensed aromatic compound.
Preparation and Characterization of BaTiO
Powders and Thin films
Jung, Miewon ; Son, Hyunjin ; Lee, Jiyun ; Kim, Hyunjung ;
Analytical Science and Technology, volume 17, issue 2, 2004, Pages 173~179
powders and thin films were prepared by an alkoxide modified sol-gel process (polymerization-complex route) using ethylene glycol. The stable starting (Ba-Ti)-mixed metal organic sol was made by addition of acetylacetone. The
powders, which had a particle size of 40~77 nm, were crystallized from an amorphous to a tetragonal phase on annealing at 700 and
for 1 h. From FT-IR, solid-state
CP/MAS NMR spectroscopy and X-ray diffractometry, the trace of the Ba-Ti-oxycarbonate phase first appeared at
. Hydrolyzed sol was spin coated on a quartz wafer at 3500 rpm for 60 s and pyrolyzed at
for 1 h. After heat treatment, the coated layer became dense and smooth.
Determination of Histidine by Spectrofluorometry
Cha, Ki Won ; Huang, Huazi ;
Analytical Science and Technology, volume 17, issue 2, 2004, Pages 180~183
A simple and sensitive determination method of histidine has been investigated using the spectrofluorometry. An emission peak of
- TTA- histidine complex occurs at 470 nm in aquous solution with excitation at 235 nm and the fluorescence intensity increased linearly with addition of histidine in the range of
. The detection limits was
with 3.5% RSD. The present method was applied to determine histidine content in the synthetic sample.
Comparison of Dioxin Analytical Results Between SP-2331 and DB-5MS Capillary Columns in the HRGC/HRMS Analysis
Hong, Jongki ; Yang, Jeong-Soo ; Shin, Jung-Hwa ; Ahn, Yun-Gyong ; Lee, Dai-Woon ;
Analytical Science and Technology, volume 17, issue 2, 2004, Pages 184~191
In this study, the separation of toxic dioxin 2,3,7,8-congeners by DB-5MS and SP-2331 GC columns which are widely used in HRGC/HRMS analysis was examined. Through the dioxin analysis of column performance check standard solution and fly ash sample, the isomer specific separation of 2,3,7,8-substituted dioxins from tetra to hexa-isomers on DB-5MS and SP-2331 columns were studied. The effect of I-TEQ value by these columns was also studied. The total concentrations of toxic dioxins for the column performance check standard solution were 508.4 ng/mL analyzed by DB-5MS and 515.8 ng/mL analyzed by SP-2331, respectively. The I-TEQ value obtained by both columns was shown to be almost equivalent for the column performance check standard solution and fly ash sample.
Development of the Discrimination Methods for Geographical Origin of Bracken(Pteridium aquilinum) by Capillary Electrophoresis
Kim, Eun Young ; Kim, Jung Hyun ; Chung, Kyung Sook ; Rhyu, Mee Ra ;
Analytical Science and Technology, volume 17, issue 2, 2004, Pages 192~197
The discrimination of bracken (Korean vs. Chinese) has been attempted using capillary electrophoresis (CE). Bracken (Pteridium aquilinum) was extracted with 30% methanol and separated on a uncoated fused-silica (
) capillary. Conditions for optimal analysis include: temperature,
; voltage, 8 kV; and pressure injection time, 5 sec. The optimal separation buffer was 0.3 M borate buffer (pH 8.5) containing 40 mM CHAPS with 30% ethylene glycol. Under the optimal conditions established for CE, the ratio of specific peak area (peak PA-1) to other peak area (peak PA-2) was effective in discrimination of Korean and Chinese bracken. The mean accuracy for discrimination of Korean and Chinese brackens were 80% and 86%, respectively.