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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 20, Issue 6 - Dec 2007
Volume 20, Issue 5 - Oct 2007
Volume 20, Issue 4 - Aug 2007
Volume 20, Issue 3 - Jun 2007
Volume 20, Issue 2 - Apr 2007
Volume 20, Issue 1 - Feb 2007
Selecting the target year
Tendency of the indoor pollutants along with increased dwelling period at new apartments
Jang, Seong Ki ; Ryu, Jung Min ; Seo, Soo Yun ; Lim, Jung Yeon ; Lee, Woo Seok ;
Analytical Science and Technology, volume 20, issue 6, 2007, Pages 453~459
This study is for investigation of indoor conditions with air contamination after occupation 120 households in brand-new apartments by measuring the concentration of VOCs and carbonyl compounds. It has been found that TVOC (total volatile organic compounds; TVOCs) were
after moving in. And formaldehyde, toluene, m, p-xylene, acetone and ethylbenzene were
, respectively. The mean concentrations of indoor air pollutants tend to decrease along an increase dwelling period. But, the mean concentration of d-limonene increased from 2 months to 10 months. Also, toluene, ethylbenzene, m, p, o-xylene amounted to 38.8 % among VOCs studied, this ratio tend to decrease along with and increased dwelling period.
Dose rate conversion factor for soil by the beta-rays and gamma-rays from
Kim, Gi-Dong ; Eum, Chul-Hun ; Bang, Jun-Hwan ;
Analytical Science and Technology, volume 20, issue 6, 2007, Pages 460~467
Dose rate conversion factor was calculated to estimate the absorbed effective annual doses for soils for the beta-rays and gamma-rays, which were emitted from
isotopes. The most recent data of the emitted energies per decay, half-lifes, and branching ratios, which were obtained from National Nuclear Data Center, were used. When this factor and the effective annual doses for the beta-rays and the gamma-rays of natural radioisotopes were compared with those of Aitken, these of
are estimated to have good agreements but a large difference is shown in this for
. Through the calculations of effective annual doses by using these factor and the measurements of gamma-ray spectra for soils, which were extracted from prehistoric remains (Mansuri) on Osong, Chungchengbuk-do, The annual effective doses were obtained to be 3.8~5.9 mGy/yr. Also, when these doses including decay elements upper Rn were compared with those on all isotopes, the differences within 9~30 % were obtained. The analysis method of the annual effective doses for the beta-rays and the gamma-rays of the natural isotopes of soils was established by this dose rate conversion factor.
Element distribution of the surface sediments from the loess plateau in China
Yoon, Yoon Yeol ; Kwon, Young Ihn ; Cho, Soo Young ; Lee, Kil Yong ;
Analytical Science and Technology, volume 20, issue 6, 2007, Pages 468~473
The chemical composition distribution of the surface samples collected from the loess plateau in China were estimated. Major elements concentration distribution difference between 10 different sampling site were not found except sample 3. This sample had higher contents of Ca, Mg, LOI and lower contents of Si, Fe, P, Na, Ti. And also, minor element contents such as Ba, Cr, Nb, Pb, Rb, Zr, V were lower than other samples. UCC-normalized abundances of the most elements were within
and Cr showed enrichment aspect. Rare-earth element (REE) analysis results showed light REE enriched pattern compared to heavy REE with negative Eu anomaly in condrite-normalized REE pattern.
Seasonal variations of volatile organic compounds (VOCs) in indoor air of daycare centers
Jang, Seong-Ki ; Chun, Jae-Young ; Kim, Sung-Youn ; Park, Suk-Young ; Ryu, Jung-Min ; Lim, Jung-Yeon ; Lee, Woo-Suk ;
Analytical Science and Technology, volume 20, issue 6, 2007, Pages 474~482
Daycare centers are an important indoor environment for pre-school children and exposure area with potential harmful health effects for infants and children who spend most of their daily life. Sampling was undertaken at 29 daycare centers located Seoul in Korea from January, 2006 to December 2006. The target compounds were 7 individual volatile organic compounds (benzene, toluene, ethylbenzene, m,p-xylene, styrene, o-xylene, TVOC). The mean concentrations of TVOC, toluene, m ,p-xylene, ethylbenzene, benzene and styrene in daycare centers were
, respectively. Toluene occupied 17.6 % of the concentration of individual VOCs. The ratio of indoor and outdoor (I/O) of TVOC and toluene were 2.0 and 1.6, respectively. The results of characteristics according to a season of a year, the concentration of TVOC were measured
, and these concentrations during third quarter of the year in summer were higher than the other season. In the other four seasons, TVOC were measured 280.5 in winter, 298.3 in spring and
in fall, respectively.
Electrochemistry of bis(1,10-phenanthroline)copper(II)-sodium dodecyl sulfate solution in the presence of MgCl
Ko, Young Chun ;
Analytical Science and Technology, volume 20, issue 6, 2007, Pages 483~487
Electrochemistry of 1.0 mM bis(1,10-phenanthroline)copper(II)
in 100 mM NaCl solution including 27 mM
with and without sodium dodecyl sulfate (SDS) is studied. In the presence of SDS,
shifts to a positive direction compared to the SDS free. The intersection of two lines on
vs -log[SDS] plot is determined as a critical micelle concentration (CMC). When
is added, it seems that the double layer became more compact. And the formation of micelles is retarded.
Evaluation of TVOC contribution from Raw materials of PVC wallpaper using the Headspace-SPME-GC/MS
Jang, Mi-Ok ; Jeong, Tak-Kyo ; Jeong, Yung-Rim ; Kim, Man-Goo ;
Analytical Science and Technology, volume 20, issue 6, 2007, Pages 488~495
A wallpaper having many surfaces in indoor is composed of various raw materials. In this study, TVOC contribution from raw materials of PVC wallpaper was evaluated by using headspace-solid phase microextraction (HS-SPME)-GC/MS. Samples were diluent, resin stabilizer, plasticizer, filler, blowing agent and PVC resin. 9 mL of each sample was put into 22 mL glass vial and they were equilibrated for 1 hour at
. Headspace in vial was absorbed to
Carboxen-PDMS fiber and analyzed by GC/MS. Aromatic compounds like a toluene, ethylbenzene and xylene, ketones compounds like a acetone, methoxyacetone and 2-butanone and alkane compounds like a nonane decane and undecane were identified from raw materials. And alcohol compounds like a ethanol and butanol and aldehydes were detected. TVOC emission of diluent, resin stabilizer, plasticizer, PVC resin, blowing agent and filler were
, respectively. Contribution of TVOC emission of diluent, resin stabilizer and PVC resin that were concerned about add ratio were 0.708, 0.129, 0.115, respectively. In conclusion, it's necessary to reduce TVOC emission through improvement of diluent, resin stabilizer and PVC resin. Also, HS-SPME-GC/MS method which was developed in this study will be used for raw materials analysis effectively.
Determination of gold concentration in ore by ICP-AES with MIBK
Lim, Heon-Sung ; Lee, Sueg-Geun ;
Analytical Science and Technology, volume 20, issue 6, 2007, Pages 496~501
The 242.795 nm on ICP-AES for the gold analysis was the most sensitive wavelength which was also interfered severely by the spectra of other metal ions such as manganese, chromium, cobalt, and iron. In order to analyze the gold in ore, the gold must be separated from the interfering ions. The best solvent for separation of gold in ore solution was 10 % n-hexane contained MIBK mixed solvent. The gold recovery was 97.5 % from mixed metal solution contained about 2 M
and 0.5 M HCl.
Determination of mixing ratios in a mixture via non-negative independent component analysis using XRD spectrum
You, Hanmin ; Jun, Chi-Hyuck ; Lee, Hyeseon ; Hong, Jae-Hwa ;
Analytical Science and Technology, volume 20, issue 6, 2007, Pages 502~507
X-ray diffraction method has been widely used for qualitative and quantitative analysis of a mixture of materials since every crystalline material gives a unique X-ray diffraction pattern independently of others, with the intensity of each pattern proportional to that material's concentration in a mixture. For determination of mixing ratios, extracting source spectra correctly is important and crucial. Based on the source spectra extracted, a regression model with non-negativity constraint is applied for determining mixing ratios. In some mixtures, however, X-ray diffraction spectrum has sharp and narrow peaks, which may result in partial negative source spectrum from independent component analysis. We propose several procedures of extracting non-negative source spectra and determining mixing ratios. The proposed method is validated with experimental data on powder mixtures.
Age determination of bricks related to Muryong Royal Tomb of the Baekje Kingdom using subtraction method
Kim, Myung-Jin ; Song, Ki-Woung ; Lee, Chan-Hee ; Jang, Sung-Yoon ; Takashima, Isao ; Hong, Duk-Geun ;
Analytical Science and Technology, volume 20, issue 6, 2007, Pages 508~515
Age determination was carried out with the bricks relating to Muryong Royal Tomb of the Baekje Kingdom, for which there is no information on the external gamma dose rate, by using the subtraction method of luminescence dating. In the subtraction method, each paleodose for fine grain and for quartz inclusion is required for the sample to be dated. In this study, the paleodose for the fine grain was estimated by thermoluminescence measurement and the paleodose for the quartz inclusion was determined using optically stimulated luminescence. The resultant ages among the bricks showed good agreement with standard deviation of 6 % error. Finally the bricks relating to Muryong Royal Tomb were evaluated as AD
Impurity analysis and acid leaching purification of silica minerals
Lee, Kil Yong ; Yoon, Yoon Yeol ; Cho, Soo Young ; Chae, Young-Bae ;
Analytical Science and Technology, volume 20, issue 6, 2007, Pages 516~523
Purification of silica mineral has been investigated by acid leaching of pulverized silica. A series of studies has been carried out on the effect of leaching silica powder as a function of the leaching time at the constant temperature of
in oxalic acid, aqua regia, and two mixed acids of HF/HCl,
. The impurities of silica and leachantes were measured by neutron activation analysis (NAA), inductively coupled plasma atomic emission spectrometry (ICP-AES), atomic absorption spectrometry, x-ray fluorescence (XRF) method and wet analysis (WA). Certain metals, such as sodium, calcium, iron, aluminium and titanium, have been found in concentrations of hundreds or even thousands of mg/kg. Comparison of purification processes of silica and analytical methods of impurities in the silica was conducted in this study.
Analysis of multi-elemental concentration in hair according to effect of permanent wave and bleaching agents
Kim, Jun-Kwang ; Ha, Byung-Jo ;
Analytical Science and Technology, volume 20, issue 6, 2007, Pages 524~528
Variations of the twenty one metal components (Mg, Al, V, Cr, Co, Sr, Ba, Na, K Mn, Fe, Cu, Zn, As, Hg, Pb, Ca, P, Mo, Cd, Sb) were analyzed in human hair sample by inductively coupled plasma mass spectrometry (ICP-MS). The effect of bleach and permanent wave manipulation on the elemental composition of hair were investigated. It was found that the composition of hair varied with hair bleach and permanent wave. Hair sample was collected from male in the age of thirties. Hair sample (0.05 g) was added to the Teflon digestion bomb together with 1.5 mL of nitric acid and an appropriate amount of In as an internal standard. The sample was then decomposed in the microwave digestion system. In normal hair, the contents of V, Cr, Mn, Fe, Co, Cu, Zn, As, Mo, Cd, Sb and P were increased in permanent wave hair, and Mg, Al, V, Co, Sr, Ba, Na and K were increased in bleached hair. But Mg, Al, Sr, Ba, Hg, Pb, Na, K, and Ca contents were decreased with permanent wave hair, Mn, Fe, Cu, Zn, As, Hg, Pb and Ca contents were decreased with bleached hair.