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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 22, Issue 6 - Dec 2009
Volume 22, Issue 5 - Oct 2009
Volume 22, Issue 4 - Aug 2009
Volume 22, Issue 3 - Jun 2009
Volume 22, Issue 2 - Apr 2009
Volume 22, Issue 1 - Feb 2009
Selecting the target year
Effect of the far infrared irradiated water on the growth of the cotyledons, hypocotyls and roots of the spring radishes
Cho, Bong-Heuy ;
Analytical Science and Technology, volume 22, issue 4, 2009, Pages 277~284
The germination rate of radishes grown with the far infrared irradiated water and drinking water was 100% and 78% respectively. The far infrared irradiated water stimulated the cell division of the cotyledons and enlarged the cell sizes both in the dark and in the light. In the dark and light conditions, the size of the cotyledons of transversal axis and longitudinal axis grown with the far infrared irradiated water was bigger than that grown with the drinking water. The content of chlorophyll and the consumption of
of the cotyledons grown with the far infrared irradiated water were higher, respectively. Osmotic pressure of the cotyledons grown with the far infrared irradiated water was 1.25 factors higher than that grown with the drinking water. The water potential of the cotyledons grown with the far infrared irradiated water was more negative value. The length of hypocotyls grown with the far infrared irradiated water was 2.18 factors longer in the dark, 1.99 factors longer in the light than that grown with the drinking water and the radish roots grown with the far infrared irradiated water were larger, respectively.
A Study on change in thermal properties and chemical structure of Zr-Ni delay system by aging
Park, Byung Chan ; Chang, Il Ho ; Kim, Sun Tae ; Hwang, Taek Sung ; Lee, Seungho ;
Analytical Science and Technology, volume 22, issue 4, 2009, Pages 285~292
It has been observed that, after long term storage, some ammunitions are misfired by tamping (combustionstopping) due to aging of the chemicals loaded in the ammunitions. Used in ammunitions are percussion powder which provides the initial energy, igniter which ignites the percussion powder, and a delay system that delays the combustion for a period of time. The percussion powder is loaded first, followed by the igniter and then the delay system, and the ammunitions explode by the energy being transferred in the same order. Tamping occurs by combustion-stopping of the igniter or insufficient energy transfer from the igniter to the delay system or the combustion-stopping of the delay system, which are suspected to be caused by low purity of the components, inappropriate mixing ratio, size distribution of particulate components, type of the binder, blending method, hydrolysis by the humidity penetrated during the long term storage, and chemical changes of the components by high temperature. Goal of this study is to find the causes of the combustion-stopping of the igniter and the delay system of the ammunitions after long term storage. In this study, a method was developed for testing of the combustion-stopping, and the size distributions of the particulate components were analyzed with field-flow fractionation (FFF), and then the mechanism of chemical change during long term storage was investigated by thermal analysis (differential scanning calorimetry), XRD (X-ray diffractometry), and XPS (X-ray photoelectron spectroscopy). For the ignition system, M (metal)-O (oxygen) and M-OH peaks were observed at the oxygen's 1s position in the XPS spectrum. It was also found by XRD that
was produced. Thus it can be concluded that the combustion-stopping is caused by reduction in energy due to oxidation of the igniter.
Comparison of the Heavy Metal Analysis in Soil Samples by Bench-Top ED-XRF and Field-Portable XRF
Choi, Soo-Jung ; Kim, Chong-Hyeak ; Lee, Sueg-Geun ;
Analytical Science and Technology, volume 22, issue 4, 2009, Pages 293~301
As a basic research for development of the domestic field-portable XRF spectrometer, we discussed the analytical results of bench-top ED-XRF and field-portable XRF method for polluted heavy metals such as Cr, As, Se, Hg, Pb, Cd in soil samples. To obtain the best performance of the XRF spectrometer, the instrumental parameters of X-ray tube-voltage and measurement time were optimized for 6 heavy-metal elements in soil using certified reference material. The quantitative analysis of Cr, As, Se, Hg, Pb, Cd concentration in certified reference materials and soil samples were compared by empirical method and fundamental parameter method.
Determination of trace boron in steels by prompt gamma-ray activation analysis
Kim, I.J. ; Cho, K.H. ; Paul, R.L. ;
Analytical Science and Technology, volume 22, issue 4, 2009, Pages 302~306
A trace amount of boron in steel significantly influences its mechanical and physical properties. A prompt gamma ray activation analysis (PGAA) method is used to measure boron in low alloy steel samples of KRISS 101-01-C21~C26. NIST SRMs of 362, 364, 1761 and 1767 serve as the control standards to validate the measurement method. The measured values of the NIST SRMs are consistent with their certified values within the expected uncertainties, except for that of NIST SRM 362. Experimental uncertainties are evaluated according to the guidelines given by the International Organization for Standardization (ISO). The expanded uncertainties are calculated with a coverage factor of 2, at approximately 95% confidence level. The calculated relative expanded uncertainties of boron mass fractions are between 3% and 7% at the mg/kg level. The results are compared with the results measured by the solvent extraction-inductively coupled optical emission spectrometry (ICP/OES) method.
Determination of carbaryl in aqueous solution by fluorescence spectrometry
Kim, Wook Hyun ; Lee, Sang Hak ;
Analytical Science and Technology, volume 22, issue 4, 2009, Pages 307~312
A spectrofluorimetric methods has been developed for the determination of carbaryl in an aqueous solution. The effects of excitation wavelength, concentration of surfactant, concentration of ethanol as cosurfactant and emission wavelength on the fluorescence intensity were investigated to find the optimum experimental conditions to determine carbaryl. The emission intensity of the carbayl was increased with addition of sodium dodecyl sulfate (SDS) as a surfactant. The emission intensity of the carbaryl was further increased with addition of ethanol as a co-surfactant. The optimum conditions were 281 nm for excitation wavelength,
SDS, 20% (v/v) ethanol and 349 nm for emission wavelength. Under the optimum conditions, the emission intensity increased with the carbaryl concentration in the range of
with a detection limit (
. The resulting correlation coefficient of the working curve was 0.9996.
Effect of acid or base additive in the mobile phase on enantiomer separation of amino alcohols using polysaccharide derived chiral columns
Huang, Hu ; Jin, Jing Yu ; Lee, Wonjae ;
Analytical Science and Technology, volume 22, issue 4, 2009, Pages 313~318
Liquid chromatographic enantiomer separation of amino alcohols was performed on several chiral columns based on polysaccharide derivatives under the mobile phase conditions containing acid or base additive. The chromatographic parameters were greatly influenced by the nature of the mobile phase containing acid or base additive as well as the used chiral columns. Compared to chromatographic results obtained in the mobile phase containing base additive (0.1% triethylamine), especially, Chiralcel OD showed dramatically enhanced separation factors and resolution factors with reduced capacity factors under the mobile phase condition containing acidic additive (0.1% trifluoroacetic acid). When the mobile phase containing 0.05% trifluoroacetic acid and 0.05% triethylamine was used on Chiralcel OD, the greatest separation factors and resolution factors among all other mobile phase conditions in this study were observed.
Analysis of residual neomycin in honey by LC-MS/MS
Shim, Young-Eun ; Jeong, Ji-Yoon ; Myung, Seung-Woon ;
Analytical Science and Technology, volume 22, issue 4, 2009, Pages 319~325
An effective and specific procedure for confirmation of neomycin, aminoglycoside antibiotic in honey was developed and validated. Honey was adjusted to pH 2 with 0.1M HCl and applied to weak cation-exchange SPE cartridge. Neomycin was eluted with basified methanol. Following separation by ion-pairing liquid chromatography, neomycin was analysed with positive electrospray ionization and MRM mode. Quantification was linear over the range of
>0.9951). The precision (R.S.D.) and accuracy (as a bias) of quality control samples in honey ranged 11.5~18.7% and 10.9~20.9%, respectively. Established method can be applied to analysis of neomycin in honey.
Simultaneous analysis of residual glucocorticoids in egg by LC/MS/MS
Jang, Mi-Ae ; Myung, Seung-Woon ;
Analytical Science and Technology, volume 22, issue 4, 2009, Pages 326~335
A specific analytical method able to identify and quantify traces of six glucocorticoids residues in eggs were developed. The extraction and clean-up parameters for simultaneous analysis were evaluated and HPLC and spectrometric conditions were also established. For determination of glucocorticoids, 5 g of egg was transferred into a test tube, adjusted pH 5.2 with acetate buffer and was
-glucuronidase/arylsulfatase from Helix pomatia added. The mixture was centrifuged and supernatant was extracted twice with 20 mL n-hexane. The extraction was performed with HLB cartridge using methanol, followed by clean-up with silica cartridge using methanol/ethyl acetate (4/6, v/v). The analytes were determined by HPLC/ESI-MS/MS operating in the negative ion mode. Validation studies with fortified egg samples for established method were performed. The result of method validation gave good efficiency, linearity, accuracy and precision. The correlation coefficients (
) of the calibration curves appeared to be higher than 0.99 in egg, indicating excellent linearity. LOD was ranged 0.09 to
, and recoveries for most compounds were in the range of 55.7-69.8%. This method can be used to determine
levels of glucocorticoids in eggs.
Contents of mercury, lead, cadmium, and arsenic in dried marine products
Ok, Hwang Young ; Kim, Su Un ; Ryu, Seung Hee ; Ham, Hee Jin ; Park, Gun Yong ; Park, Seog Gee ;
Analytical Science and Technology, volume 22, issue 4, 2009, Pages 336~344
This survey was carried out to estimate the contents of heavy metals (Hg, Pb, Cd, and As) in 10 kinds of dried marine products (n=189) which are closely related to food resources. The contents of heavy metals were estimated by inductively coupled plasma spectrometer (ICP) and mercury analyzer. The values of heavy metals in dried marine products were as follows (Mean
SD (range), mg/kg). The average contents of heavy metals in the dried marine products were Hg
(0.002~0.502) mg/kg, Pb
(ND~5.130) mg/kg, Cd
(ND~6.802) mg/kg, As
(ND~71.760) mg/kg. The range of heavy metal contents in dried marine products are low level, except of lead contents (n=2). In the comparison of heavy metal content by anchovy size, it was shown that cadmium, mercury and arsenic were meaningfully different. The contents of heavy metals by the shape of shrimp and Alaska Pollack were shown that the result of each group was meaningless. In the comparison imported production with domestic production, in the case of common squid, cadmium and arsenic were meaningfully different. The weekly average intakes of Hg, Pb and Cd from dried marine products takes about 1.17~11.52% of PTWI (Provisional Tolerable Weekly Intakes) that FAO/WHO Joint Food Additive and Contaminants Committee has set to evaluate their safeties.
Elucidation of new anti-impotency analogue in food
Suh, Junghyuck ; Choi, Jangduck ; Park, Kunsang ; Hu, Soojung ; Yoon, Taehyung ; Kim, Eunju ; Han, Seungwoo ; Kim, Sohee ; Lee, Kwangho ; Kwan, Sungwon ; Kim, Deukjoon ;
Analytical Science and Technology, volume 22, issue 4, 2009, Pages 345~353
The new anti-impotency analogue was identified in food source. Detection of this analogue was accomplished through screening of food samples by liquid chromatography/photodiode array detector. The spectrum pattern of analogue compound was similar to that observed for hongdenafil which was analogue of sildenafil. This new compound was isolated and purified using the liquid-liquid extraction, thin layer chromatography, column chromatography and preparative HPLC. And then those structure were identified using analytical instruments such as HPLC/PDA, LC/MS/MS and NMR. The compound was given a name to oxohongdenafil which was replaced with acetyl oxoethylpiperazinyl residue instead of sulfonyl piperazine group of sildenafil. The regulation for the abovementioned analogue, oxohongdenafil, was established by Standard of Korean food code.