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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 24, Issue 6 - Dec 2011
Volume 24, Issue 5 - Oct 2011
Volume 24, Issue 4 - Aug 2011
Volume 24, Issue 3 - Jun 2011
Volume 24, Issue 2 - Apr 2011
Volume 24, Issue 1 - Feb 2011
Selecting the target year
Profiling analysis of catecholamines and polyamines in biological samples
Kim, Min-Ji ; Kim, Bo-Kyung ; Kim, Seong-Min ; Park, Ji-Suk ; Hong, Jong-Ki ;
Analytical Science and Technology, volume 24, issue 5, 2011, Pages 319~335
DOI : 10.5806/AST.2011.24.5.319
A study on aging characteristics of epoxy resins for conservation treatment of cultural heritage by adding UV stabilizer
Jeong, Se-Ri ; Cho, Nam-Chul ;
Analytical Science and Technology, volume 24, issue 5, 2011, Pages 336~344
DOI : 10.5806/AST.2011.24.5.336
The study attempted to find out any effect to prevent photo aging of epoxy resin used for conservation by way of adding UV stabilizer, one of plastic additives. Specimens were made by adding HALS and UVA UV stabilizer as each concentration to 3 kinds of epoxy resin, which are most frequently used for artifacts joining and restoration process, and aging effects were investigated through Color change, SEM, contact angle, FTIR analysis during UV aging experiments. Last, usage suitability was checked when UV stabilizer was added through Universal Tensile strength tester. In result, it is impossible to prevent decomposition of chemical structure in spite of adding UV stabilizer but in the case of epoxy A and R, it is believed that photo aging such as yellowing or crack can be minimized without giving a big influence to adhesive strength of epoxy resin through adding less than 0.1% of UVA. It is expected that above will solve photo aging problem of epoxy resin used for joining and restoration of artifacts and will extend its life as joining and restoration materials.
Determination of finasteride in human serum by LC-MS/MS
Nam, Hye-Seon ; Nam, Kyong-Hee ; Jung, Su-Hee ; Lee, Jang-Woo ; Kang, Jin-Yeong ; Hong, Soon-Keun ; Kim, Tae-Sung ; Kang, Tae-Seok ; Yoon, Hae-Jung ; Lee, Kwang-Ho ; Rhee, Gyu-Seek ;
Analytical Science and Technology, volume 24, issue 5, 2011, Pages 345~351
DOI : 10.5806/AST.2011.24.5.345
A liquid chromatography-electrospray ionization tandem mass spectrometry (LC-ESI/MS/MS) method was developed and validated for the determination of finasteride in human serum. Beclomethasone was used as internal standard (IS) and liquid-liquid extraction (LLE) using methyl tert-butyl ether (MTBE) was carried out to isolate analyte. The mass transitions monitored in multiple reaction monitoring (MRM) in positive ion mode were m/z 373.2
305.2 for finasteride and m/z 409.3
391.2 for IS. Retention times of finasteride and IS were 5.81 and 5.46 min, respectively. The limit of quantitation (LOQ) was 0.1 ng/mL and the calibration curve showed good linearity in the range of 0.1~20.0 ng/mL (
=0.9997). The intra-day assay precision and accuracy were in the range 6.3~10.6% and 97.3~103.6%, respectively, and the inter-day assay precision and accuracy were in the range 0.8~5.2% and 99.8~102.5%, respectively. The sample extract recovery of the method was 80~83%.
Solvent-free determination of BTEX in water using repetitive membrane extraction followed by GC-MS
Kim, He-Kap ; Kim, Se-Young ; Lee, Soo-Hyung ;
Analytical Science and Technology, volume 24, issue 5, 2011, Pages 352~359
DOI : 10.5806/AST.2011.24.5.352
An analytical method for solvent-free determination of benzene, toluene, ethylbenzene, and xylenes (BTEX) in water using repetitive membrane extractions coupled to cryofocusing and GC-MS was derived. BTEX compounds that permeated through a nonporous silicone membrane from the aqueous phase and evaporated into the acceptor phase were purged into a cryofocusing trap (
) with helium gas. The BTEX compounds, thus enriched in the trap, were thermally desorbed into a capillary column GC and detected using an MS. The flow rate of the donor phase (30 mL water) was set at 10 mL/min, and membrane extractions, accomplished by returning the water drained from the extraction module to the sample container, were repeated three times at
. Although recoveries (%) were variable, from the highest for benzene (approximately 80%) to the lowest for ethylbenzene and xylenes (3.5-10%), the method showed satisfactory precision (RSD 2.2-10%) with good-linearity calibration curves (
0.9976-0.9997 in 1-100
/L range) for all of the compounds. The method detection limits (MDLs) ranged from 0.16 to 1.8
/L. The results showed the method's advantages such as short analysis time and overall simplicity without solvent compared to the conventional techniques.
Measurement of optical purity for commercial naproxen by chiral HPLC
Yu, Jeong-Jae ; Lee, Won-Doo ; Ryoo, Jae-Jeong ;
Analytical Science and Technology, volume 24, issue 5, 2011, Pages 360~367
DOI : 10.5806/AST.2011.24.5.360
Optical purities of 10 commercialized naproxens prepared from eight Korean drug companies were examined by an optimized chiral HPLC condition. The Chiralcel OD-H column and ChiralHyun-LE(S)-1 column were used as chiral stationary phases and the mixed eluent of hexane/isopropanol/acetic acid as 100:2.85:0.1 was used as a mobile phase for effective enantioseparation. Optical purity values of most samples were higher than 97 percents, only one of them was about 95 percents. The average relative standard deviation of them appeared very small (0.034%).
Relationship between noise and air pollution levels in Residential areas: comparison between roadside and non-roadside sites
Lee, Min-Hee ; Park, Chan-Goo ; Ryu, In-Cheol ; Kim, Ki-Hyun ;
Analytical Science and Technology, volume 24, issue 5, 2011, Pages 368~377
DOI : 10.5806/AST.2011.24.5.368
In this study, we analyzed the relationship between noise and air pollution from 6 residential sites from 6 districts in Seoul. The survey of all noise date obtained from 6 sites were also compared between road and nonroad area and between active (06:00-22:00) and inactive time bands (22:00-06:00). Comparison of the data between two time bands indicates that their differences are not large enough. On the other hand, if comparison of data is made by correlation analysis for road and non-road areas, strong correlations between noise levels and air pollution tend to be prevalent consistently in road area relative to the non-road area. In contrast, a correlation between noise levels and air pollution tends to decrease at the road area in inactive period relative to active period.
A study on relationship of concentration of phosphorus, turbidity and pH with temperature in water and soil
Min, Young-Hong ; Hyun, Dae-Yoeung ; Eum, Chul-Hun ; Chung, Nam-Hyun ; Kang, Sam-Woo ; Lee, Seung-Ho ;
Analytical Science and Technology, volume 24, issue 5, 2011, Pages 378~386
DOI : 10.5806/AST.2011.24.5.378
The goal of this study is to understand the influence of temperature on phosphorus release rate from soil into water. As the temperature increases,
-P reaches equilibrium more quickly and the equilibrium concentration increases, and thus the
-P concentration increases, and pH decreases. The
-P concentration affects pH.
-P released from turbidity is not adsorbed onto the turbidity.
-P was independent on the turbidity and yet
-P was steadily increasing. However,
-P was dependent upon the turbidity concentration as the turbidity releases
-P. The total phosphorous (T-P) and turbidity were directly linked because T-P changed with the turbidity. T-P includes the
-P content of water and the phosphorus content of the turbidity. As the temperature decreases, density of water increases, and the precipitation of turbidity decreases, resulting in an increases in T-P concentration. As the temperature increases, the T-P concentration decreases, but the PO4-P release rate from turbidity increases. At the same time, even at different temperatures, the T-P concentrations of the samples were about the same. When the lake gets deepened, the water temperature decreases, hence, the phosphorus release rate from soil into water was decreased. This mechanism is of great interest because phosphorus is released from soil sediment into the lake water.
Content and leaching characteristics of non-regulated hazardous substances in waste from the paint industry
Jeong, Seong-Kyeong ; Kim, Woo-Il ; Kang, Young-Yeul ; Kim, Dong-Un ; Cho, Yoon-A ; Shin, Sun-Kyoung ; Oh, Gil-Jong ;
Analytical Science and Technology, volume 24, issue 5, 2011, Pages 387~394
DOI : 10.5806/AST.2011.24.5.387
This study was performed to investigate the contents and leaching characteristics of hazardous wastes from the paint industry. In order to establish a hazardous waste list, samples from industrial discharge have been analyzed for 8 non-regulated inorganic hazardous substances (i.e., Sb, Ni, F, V, Ba, Zn, Be, Se). In more detail, hazardous waste samples from a total of 64 workplaces, e.g. manufacture, formulation, supply and use (MFSU) of coatings, adhesives, sealants and printing inks processing, have been chosen and analyzed. Contents and leaching tests for inorganic metal species in samples show that the non-regulated hazardous substances satisfy all the criteria, while quantitative analyses reveal that some samples of the discharged wastes exceeded the criteria proposed by NIER (National Instituted of Environmental Research). In conclusion, we expect the outcome of this study to align the classification system of hazardous waste management in South Korea with international legislations, and consequently contribute to reduce environmental pollution as well as health risks by toxic wastes.
Content characteristics of persistent organic pollutants waste from paint, iron making and steel making process
Kim, Dong-Un ; Kim, Woo-Il ; Kang, Young-Yeul ; Lee, Dong-Jin ; Jeong, Seong-Kyeong ; Cho, Yoon-A ; Yeon, Jin-Mo ; Shin, Sun-Kyoung ; Oh, Gil-Jong ;
Analytical Science and Technology, volume 24, issue 5, 2011, Pages 395~400
DOI : 10.5806/AST.2011.24.5.395
This study has been carried out in order to effectively manage three groups of unregulated hazardous organic substances (PCDD/DFs, PAHs, PCBs) in South Korea. The investigated substances have been analyzed according to the test methods for hazardous substances in specified wastes provided by the National Institute of Environmental Research, Korea. Total contents of the organic compounds have been determined for hazardous wastes from three major industrial categories (paint, iron removal, steelmaking), such as waste organic solvent, waste paint or dust. By investigating the waste samples for 7 PAHs using GC/MSD, Naphthalene has been detected (N.D~1631.33 mg/kg). The highest Naphthalene concentration, which exceeded the korean marine dumping waste standard, was found in waste organic solvents and waste paints. Although a content analysis of 7 PCB isomers has been conducted, none of these compounds was detected. The analysis of PCDD/DFs has revealed that all samples meet the criterion for low POP content defined in the technical guidelines developed under the Basel Convention. The PCDD/DFs content in dust samples deriving from 10 manufacturing processes (billet, bloom) was determined to be in the range of N.D~5.66 ng I-TEQ/g waste.
Removal of BrO
from aqueous solution
Lim, Heon-Sung ; Kim, Chong-Hyeak ; Lee, Sueg-Geun ;
Analytical Science and Technology, volume 24, issue 5, 2011, Pages 401~405
DOI : 10.5806/AST.2011.24.5.401
The efficient removal of bromate (
) from aqueous solutions was investigated using activated alumina. Bromate is a disinfection by-product, generally formed by the reaction of ozone and bromide in drinking water during ozonation process. The removal efficiency was about 90% for bromate (500 ng/mL) ion with acidic activated alumina but over 95% with silver or aluminum treated acidic activated alumina without any treatments of neutral water within 1~2 min.