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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 18, Issue 6 - Dec 2005
Volume 18, Issue 5 - Oct 2005
Volume 18, Issue 4 - Aug 2005
Volume 18, Issue 3 - Jun 2005
Volume 18, Issue 2 - Apr 2005
Volume 18, Issue 1 - Feb 2005
Selecting the target year
Elemental analysis by neutron induced nuclear reaction - Nuclear track method for the analysis of fissile materials
Ha, Yeong-Keong ; Pyo, Hyung Yeol ; Park, Yong Joon ; Jee, Kwang Yong ; Kim, Won Ho ;
Analytical Science and Technology, volume 18, issue 4, 2005, Pages 263~270
Nuclear track is an useful tool for elemental analysis of radionuclides, such as uranium, plutonium and thorium, etc., and for elements undergoing nuclear reactions with thermal neutrons such as lithium and boron. This method has various application fields such as detecting fissionable radionuelides, measuring the fission rate in nuclear technology, analyzing cosmic radiation from meteorite, calculating the age of minerals as well as their history, etc. Track registration method has been applied to the microscopic analysis of boron and fissionable element such as uranium in KAERI. This report reviews the theoretical background of the nuclear track formation, practical procedures to obtain etched tracks and a perspective of the future.
Quantification of urea in serum by isotope dilution HPLC/MS
Lee, Hwashim ; Park, Sangryoul ;
Analytical Science and Technology, volume 18, issue 4, 2005, Pages 271~277
Urea in blood has been measured as an effective marker for diagnosis of renal function. Urea which is e end-product of nitrogen containing metabolites such as proteins is filtered through glomeruli of kidneys and then excreted as urine. If the renal function is deteriorated, the urea concentration in blood will be increased, from which the healthiness of renal function is judged. In order to improve the confidence of diagnosis results, the results must keep traceability chain to certified reference materials, which was certified by primary reference method. In this study, we proposed isotope dilution-liquid chromatography/mass spectrometry (ID-LC/MS) as a candidate primary method, in which
-urea is used as an internal reference material. The developed method is highly accurate in principle and is convenient as it does not require cumbersome derivatization. 0.1 mmol/L ammonium chloride was selected as a mobile phase for HPLC because it provided low interference in MS analysis of relatively low molecular weighted urea. HPLC and MS were connected with an electrospray ionization (ESI) interface of positive mode, which provided high sensitivity and reproducibility. The developed method was validated with internationally recognized reference materials, and we have obtained satisfactory results in an international ring trial. The expanded uncertainty calculated according to ISO guide was 1.8% at 95% confidence interval. The developed method is being used as a primary reference measurement method such as for certification of serum certified reference materials (CRMs).
Crystallographic analysis of dehydrated fully Tl
-exchanged zeolite Y
Lim, Woo Taik ; Kwon, Ji Hye ; Choi, Sik Young ; Kim, Young Hun ; Heo, Nam Ho ;
Analytical Science and Technology, volume 18, issue 4, 2005, Pages 278~286
The crystal structure of (
, dehydrated at 653 K and
torr, has been determined by single-crystal X-ray diffraction techniques in the cubic space group
at 294(1) K. The structure was refined using all intensities to the final error indices (using only the 302 reflection for which
(based on F) and
). The 71
ions per unit cell are found at four crystallographically distinct positions. Site I' position in the sodalite cavity opposite D6Rs are each occupied by eighteen
ions per unit cell; these
ions are recessed ca.
into the sodalite cavity from their O(3) plane (Tl-O=2.701(15),
). The 23
ions fill site II in the supercage; these
ions are recessed ca.
into the supercage from their O(2) plane (Tl-O = 2.850(16),
and O-T1-O =
). The 19
ions lie at site III' in the supercage near a triple 4-ring (Tl-O = 3.10(7),
and O-Tl-O = 47.8(9),
) and the remaining II ions occupy another site III' near a triple 4-ring in the supercage (Tl-O = 2.81(4),
and O-Tl-O =
Analysis of carbon monooxide in blood for teenagers at Cheongju
Kim, Chang Suk ; Park, Myong Rae ; Ryu, Hae-Ill ;
Analytical Science and Technology, volume 18, issue 4, 2005, Pages 287~291
The quantitative contents of carbon monooxide in fresh blood for smokers and nonsmokers were measured by uv-visible spectrophotometric methods on the teenagers and adults. As a result, all blood contained some level of carbon monooxide. Typical teenager nonsmokers had a carbon monooxide level between 2.45 and 2.73%, smokers had a between 7.64 and 8.81%. On the other hand, adult nonsmokers contained carbon monooxide to 3.55% in fresh blood and adult smokers had 10.64%. This means that smokers have more carbon monooxide in blood than nonsmokers at the all ages.
Change of chemical properties by neutron irradiation in boric acid solution
Choi, Ke-Chon ; Yeon, Jei-Won ; Kim, Won-Ho ;
Analytical Science and Technology, volume 18, issue 4, 2005, Pages 292~297
The effect of neutron irradiation on the chemical properties was measured in boric acid solution. The pH of the solution decreased in proportion to the irradiation time and the concentration of boric acid. The concentration of hydrogen peroxide, which is one of the radiolysis products of water, is in proportion to the concentration of boric acid, while in inverse proportion to the irradiation time. The oxygen and hydrogen gases had same chemically equivalent ratio in water radiolysis. The lithiun, which comes from
, had poor relationship with neutron irradiation time at low concentration,
, of boric acid, but the relationship was improved at higher concentration.
Determination of carbon-14 and tritium in a PWR spent nuclear fuel
Kim, Jung Suk ; Park, Soon Dal ; Lee, Chang Hun ; Song, Byong Chul ; Jee, Kwang Yong ;
Analytical Science and Technology, volume 18, issue 4, 2005, Pages 298~308
The methods for determining C-14 and tritium contents in the spent nuclear fuel sample were developed. The carbon-14(
) released during the dissolution of the spent fuel sample and
carrier) with 8 M
was collected in trap containing 1.5 M NaOH. The volatile radioactive iodine evolved when the spent fuel was dissolved, was trapped on to Ag-silicagel (Ag-impregnated silicagel) adsorbent in column which is connected to two NaOH traps. The solutions which contain tritium as HTO after fuel dissolution were decontaminated by deionization with a mixture of cation and anion exchange resins and inorganic ionexchangers. The amount of C-14 in the trap solutions and the HTO concentration in the resulting deionization water were then determined by liquid scintillation counting.
A theoretical study of the adsorption characteristics of gaseous molecules on the carbonaceous adsorbent
Shin, Chang-Ho ; Lee, Young-Taeg ; Kim, Chung-Ryul ; Kim, Seung-Joon ;
Analytical Science and Technology, volume 18, issue 4, 2005, Pages 309~319
The adsorption characteristics of gaseous molecules on the carbonaceous adsorbent have been investigated at various temperature and pressure with different pore sizes using Grand Canonical Monte Carlo (GCMC) simulation method. The geometrical parameters and spectroscopic properties of adsorbates have been computed using density functional theory (DFT). At higher temperatures is the adsorption amount of adsorbates is decreased due to their vaporization. Considering the pore size effect, the adsorption characteristic depends on the adsorbate size, polarity and interaction between adsorbates, etc. At all cases employed in this study, the adsorption amount of adsorbates on the carbonaceous adsorbent is increased in the order
, and this result is qualitatively in good agreement with the experimental observation.
Determination of chlorophenols from the industrial wastewater by GC/MS
Myung, Seung-Woon ;
Analytical Science and Technology, volume 18, issue 4, 2005, Pages 320~328
The most common five chlorophenols (4-chloro-3-methylphenol, 2,4,5-trichlorophenol, 2,4,6-trichlorophenol, 2,3,4,6-tetrachlorophenol, pentachlorophenol) were determined from the industrial wastewater by GC/MS. The samples were collected from the petrochemical company, textile company and leather making company. The developed analytical method was modified by USEPA Method 3510. The samples were extracted with dichloromethane under pH 2 and pH 5-6, and determined by the GC/MS with SIM mode. There were good linearities (above
) on e ranges of the 0.1 ng/mL~10 ng/mL and 0.5 ng/mL~10 ng/mL, and the limit of detection were between 0.1 ng/mL and 0.5 ng/mL. The absolute recoveries were measured at the concentration of 1, 5, and 10 ng/mL, and the recovery was 71.6~98.9% except for PCP. The relative standard deviation (RSD) was 1.2~14.3% and it gave a good reproducibility for the assay. The bias, which shows the accuracy, was a good although it was a little high values (11.3~22.1%) at the low concentration (1 ng/mL).
The age dating for an archaeological sample using pre-dose effect
Kim, Myung-Jin ; Hong, Duk-Geun ;
Analytical Science and Technology, volume 18, issue 4, 2005, Pages 329~337
TL dating using pre-dose effect is concerned with the sensitivity increase of
TL peak in quartz following the pre-exposure of irradiation (pre-dose) in antiquity and heating to thermal activation temperature. Using the multiple activation (MA) method for determining an equivalent dose, the activation temperature was selected to
and the region of interest was selected from
on quartz sample from archaeological remains, roof-tile kiln. which was excavated at Chudong-Ri cultural site. It was concluded that the resultant date was determined to the age of
SD), which had more improved precision considering with e radiocarbon dates and was in good agreement with the age derived by archaeological assessment. Also it was concluded that the pre-dose dating should contribute significantly to future archaeological dating work in the range of the last 2000 years.
Reduced sulfur gas loss in the bag sampling procedure - Comparison by calibration slope values
Kim, K.H. ; Choi, Y.J. ; Ahn, J.W. ;
Analytical Science and Technology, volume 18, issue 4, 2005, Pages 338~343
In this work, sample loss of reduced sulfur compounds (RSC) was investigated with respect to bag sampling techniques. For comparison purpose, calibration slopes were obtained by analyzing standards prepared by 'within syringe dilution' (WSD) method against those made either by 'Tedlar bag dilution' (TBD) or by 'polyester aluminum bag dilution' (PBD) method. The results indicated that the recovery rate of TBD showed the mean values of about 87%, while those of PBD about 77%. Despite the fact that sample loss is inevitable, precise sampling of reduced sulfur compounds may still be possible, if one acknowledges and be prepared for such loss rates of bag sampling methods.
Evaluation of sampling and analytical method for emission experiment of pollutants in building materials using small chamber
Lee, Suk-Jo ; Jang, Seong-Ki ; Kim, Mi-Hyun ; Lee, Hong-Suk ; Lim, Jun-Ho ; Jang, Mee ; Seo, Soo-Yun ;
Analytical Science and Technology, volume 18, issue 4, 2005, Pages 344~354
This study was carried out to evaluate the performance of a small chamber sampling and analytical method for the measurement of total volatile organic compounds (TVOC) and formaldehyde (HCHO) emission from building materials. While VOC was determined by the adsorbent tube sampling and sequential thermal desorption coupled with GC/MSD analysis, formaldehyde sampled with DNPH-silica cartridge was analyzed by HPLC. Wide-range performance criteria such as repeatability, desorption efficiency, emission chamber recovery test, duplicate precision, breakthrough volume and method detection limits were investigated for the evaluation of small chamber method. The overall precision of the small chamber sampling and analytical methods was estimated within 20~30% for target compounds. In conclusion, this study demonstrated that the small chamber sampling and analytical method can be reliably applied for the measurement of building materials pollutants.
Potassium loading effects for activated carbon fiber pre-treated with phosphoric acid
Oh, Won-Chun ; Bae, Jang-Soon ;
Analytical Science and Technology, volume 18, issue 4, 2005, Pages 355~361
The objective of this paper is to compare the surface features of two kinds of activated caron fiber (ACF) treated with potassium and the variation of their properties by phosphoric acid pre-treatment. X-ray diffraction (XRD) patterns indicate that activated carbon fiber containing potassium species show better performance for metal and metal salts by pre-treatment with phosphoric acid. In order to present the causes of the differences in surface properties and specific surface area after the samples were treated with phosphoric acid, pore structure and surface morphology were investigated by adsorption analysis and SEM. For the chemical composition microanalysis for potassium leading of the activated carbon fibers pre-treated with phosphoric acid, samples were analyzed by EDX. Finally, the type and quality of oxygen groups were determined from the method proposed by Boehm.
Sequence diversity of Mitochondrial DNA HV1 in Korean population
Lim, Si-Keun ; Kim, Eung-Su ; Kim, Soon-Hee ; Park, Ki-Won ; Han, Myun-Soo ;
Analytical Science and Technology, volume 18, issue 4, 2005, Pages 362~367
The human mitochondrial genome (mtDNA) has been an important tool in the field of forensic investigations. Within the entire mtDNA molecule, the non-coding control region which is approximately 1,100 bp including hypervariable region I and II (HV1 and HV2) is widely studied because it is highly polymorphic and useful for human identification purposes. In this study, 360 unrelated Koreans were analyzed in HV1. The number of polymorphic sites and genetic lineage were 124 and 210, respectively. The most prevalent substitution was C-T and 75.8% of DNA showed C-T substitution at 16223. There were 20 kinds of polymorphism between 16180 and 16193 including insertion and deletion. The most frequent haplotype was [16223T, 16362C] representing 5%. Approximately 25.9% of DNA showed the same haplotype in at least two samples. The gene diversity was calculated to 0.996 and the probability of two unrelated perosons having the same haplotype was determined to 0.7%.