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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 23, Issue 6 - Dec 2010
Volume 23, Issue 5 - Oct 2010
Volume 23, Issue 4 - Aug 2010
Volume 23, Issue 3 - Jun 2010
Volume 23, Issue 2 - Apr 2010
Volume 23, Issue 1 - Feb 2010
Selecting the target year
Study on the screening method for determination of heavy metals in cellular phone for the restrictions on the use of certain hazardous substances (RoHS)
Kim, Y.H. ; Lee, J.S. ; Lim, H.B. ;
Analytical Science and Technology, volume 23, issue 1, 2010, Pages 1~14
DOI : 10.5806/AST.2010.23.1.001
It is of importance that all countries in worldwide, including EU and China, have adopted the Restrictions on the use of certain Hazardous Substances (RoHS) for all electronics. IEC62321 document, which was published by the International Electronics Committee (IEC) can have conflicts with the standards in the market. On the contrary Publicly Accessible Specification (PAS) for sampling published by IEC TC111 can be adopted for complementary application. In this work, we tried to find a route to disassemble and disjoint cellular phone sample, based on PAS and compare the screening methods available in the market. For this work, the cellular phone produced in 2001, before the regulation was born, was chosen for better detection. Although X-ray Fluorescence (XRF) showed excellent performance for screening, fast and easy handling, it can give information on the surface, not the bulk, and have some limitations due to significant matrix interference and lack of variety of standards for quantification. It means that screening with XRF sometimes requires supplementary tool. There are several techniques available in the market of analytical instruments. Laser ablation (LA) ICP-MS, energy dispersive (ED) XRF and scanning electron microscope (SEM)-energy dispersive X-ray (EDX) were demonstrated for screening a cellular phone. For quantitative determination, graphite furnace atomic absorption spectrometry (GF-AAS) was employed. Experimental results for Pb in a battery showed large difference in analytical results in between XRF and GF-AAS, i.e., 0.92% and 5.67%, respectively. In addition, the standard deviation of XRF was extremely large in the range of 23-168%, compared with that in the range of 1.9-92.3% for LA-ICP-MS. In conclusion, GF-AAS was required for quantitative analysis although EDX was used for screening. In this work, it was proved that LA-ICP-MS can be used as a screening method for fast analysis to determine hazardous elements in electrical products.
Investigation of pollution level for PFOA and PFOS in ambient air using LC/MS/MS
Kim, Kyoung-Soo ; Shin, Park-Min ; Yeon, Jin-Mo ; Ka, Jae-Jong ; Kim, Yong-Jun ; Cho, Chon-Rae ;
Analytical Science and Technology, volume 23, issue 1, 2010, Pages 15~23
DOI : 10.5806/AST.2010.23.1.015
To investigate pollution level of PFOA and PFOS in ambient air, Cheongju city, gaseous and particulate samples were collected at industrial, residential/commercial, and rural region, respectively. Samples were collected in winter, spring, and summer season in order to examine seasonal variation of PFOA and PFOS. The concentration range of PFOA and PFOS was presented as N.D.~8.02 pg/
with an average of 2.33 pg/
, 1.68~6.94 pg/
with an average of 3.12 pg/
. These levels were lower than or similar to those of other countries.
Examination of GC-TD sensitivity for reduced sulfur compounds in relation to temporal stability and reproducibility
Hong, One-Feel ; Kim, Ki-Hyun ;
Analytical Science and Technology, volume 23, issue 1, 2010, Pages 24~35
DOI : 10.5806/AST.2010.23.1.024
To learn more about the calibration properties of reduced sulfur compounds (RSCs) by the combination of gas chromatography(GC)-pulsed flame photometric detector (PFPD) and thermal desorption method, a series of calibration experiments were conducted on the basis of both internal and external calibration approaches. For these experiments, gaseous standards of 4 RSCs (
, DMS, and DMDS) were prepared at two different concentration levels of both low (10, 20, 50,and 100 ppb) and high ranges (100, 200, 500, and 1000 ppb) along with
as an internal standard. First, the external calibration results were compared between fixed standard volume (FSV) and fixed standard concentration (FSC) method. Secondly, FSV-based calibration results were compared between external and internal calibration results. As FSV method suffers from sensitivity variations less significantly than FSC, the former is recommended to maintain the consistency in GC-TD sensitivity for RSC analysis. In addition, when the calibration data were examined in terms of RSE between external and internal calibration data, the results were not consistent enough to show improvements in internal method. Hence, diverse efforts are desirable to optimize the reproducibility in terms of GC-TD sensitivity for RSC analysis.
Characteristics of distribution and decomposition of organic matters in stream water and sewage effluent
Seo, Hee-Jeong ; Kang, Yeoung-Ju ; Min, Kyoung-Woo ; Lee, Kyoung-Seog ; Seo, Gwang-Yeob ; Kim, Seung-Ho ; Paik, Kye-Jin ; Kim, Seong-Jun ;
Analytical Science and Technology, volume 23, issue 1, 2010, Pages 36~44
DOI : 10.5806/AST.2010.23.1.036
This study was performed to investigate the distribution and decomposition characteristics of organic matter in stream water and sewage effluent located in Gwangju. Average of dissolved organic carbon (DOC) to total organic carbon (TOC) ratio was approximately 73.9% in the Youngsan river system. The concentration of refractory dossolved carbon (RDOC) was 3.7 mg/L corresponding to 80.9% of the DOC. The ratio of recalcitrant organic carbon was relatively higher than that of biodegradable organic carbon in stream. Oxidation efficiencies in the stream were 45.0% for BOD, 63.0% for
and 106.5% for CODcr. In case of sewage effluent was 33.6%, 65.7% and 136.1% respectively. Mean decomposition rate (
) of Youngsan river mainstream, its tributary sites and sewage effluent were about
, respectively and the difference was not significant between the mainstream and its tributary sites (t-test, p>0.05).
of the sewage effluent was lower than that of stream water.
Separation of chlorine in a uranium compound by pyrohydrolysis and steam distillation, and its determination by ion chromatography
Kim, Jung-Suk ; Lee, Chang-Hun ; Park, Soon-Dal ; Han, Sun-Ho ; Song, Kyu-Seok ;
Analytical Science and Technology, volume 23, issue 1, 2010, Pages 45~53
DOI : 10.5806/AST.2010.23.1.045
For the determination of chlorine in uranium compound, analytical methods by using a steam distillation and a pyrohydrolysis have been developed. The steam distillation apparatus was composed of steam generator, distilling flask and condenser etc. The samples were prepared with an aliquot of LiCl standard solution and a simulated spent nuclear fuel. A sample aliquot was mixed with a solution containing 0.2 M ferrous ammonium sulfate-0.5 M sulfamic acid 3 mL, phosphoric acid 6 mL and sulfuric acid 15 mL. The chloride was then distilled by steam at the temperature of
until a volume of
is collected. The pyrohydrolysis equipment was composed of air introduction system, water supply, quartz reaction tube, combustion tube furnace, combustion boat and absorption vessel. The chloride was separated from powdered sample which is added with
accelerator, by pyrohydrolysis at the temperature of
for 1 hour in a quartz tube with a stream of air of 1 mL/min supplied from the water reservoir at
. The chlorides collected in each absorption solution by two methods was diluted to 100 mL and measured with ion chromatography to determine the recovery yield. For the ion chromatographic determination of chlorine in molten salt retained in a metal ingot, the chlorine was separated by means of pyrohydrolysis after air and dry oxidation, and grinding for the sample.
Simultaneous determination of parabens in cosmetics by LC/MS
Park, Gyo-Beom ; Lee, Sueg-Geun ;
Analytical Science and Technology, volume 23, issue 1, 2010, Pages 54~59
DOI : 10.5806/AST.2010.23.1.054
The simultaneous analysis of parabens in cosmetic samples was carried out by LC/MS. The cosmetic samples are directly dissolved in methanol and filterated using
filter. The methanol-water was used for the mobile phase of gradient conditions. An Extend
reverse-phase column and the selected ion monitoring (SIM) mode were applied. The analysis results of LC/MS showed good linearity with correlation coefficient of
=0.9993 in the range of 0.05 to
/mL and detection limit of
Bioluminescence immunoassay for neurotransmitter, serotonin using aequorin as a Label
Ryu, Ji-Eun ; Choi, Hee-Seon ; Park, Ho-Young ; Rhee Paeng, In-Sook ;
Analytical Science and Technology, volume 23, issue 1, 2010, Pages 60~67
DOI : 10.5806/AST.2010.23.1.060
A sensitive competitive heterogeneous bioluminescence immunoassay for serotonin was developed using photoprotein, aequorin as a label for the first time with the optimal assay conditions; especially, serotoninavidin conjugate was prepared by Mannich reaction and the synthetic process of serotonin-avidin conjugate was optimized by controlling the initial molar ratios of serotonin, formaldehyde and avidin (1:12,000:25). The developed bioluminescence immunoassay for serotonin showed good sensitivity (LOD of 0.68 ng/mL) with wide area of dynamic range (
). (cf. the range for serotonin in human blood serum is
/mL). In addition, cross-reactivity studies demonstrated that 5-methoxytryptamine showed some cross-reactivity (28.0%), whereas 3-methylindole, melatonin and 5-hydroxylindole-3-acetic acid showed no crossreactivity, and good recoveries were obtained in serum. Thus, this developed method provides a good tool to monitor serotonin in serum.
Determination of cimetidine injection by square wave voltammetry
Lee, Soo-Jung ; Hahn, Young-Hee ;
Analytical Science and Technology, volume 23, issue 1, 2010, Pages 68~73
DOI : 10.5806/AST.2010.23.1.068
In order to develop the square wave voltammetric method determining cimetidine in an ampoule for injection,
cimetidine HCl solutions prepared with phosphate buffers of various pH values (3.01~8.97) were investigated by SWV. The well defined single peak due to the electrochemical reduction of -C=N-C
N- in the structure of cimetidine moved towards the cathodic direction by -0.051V/pH as the pH values were increased indicating the involvement of hydrogen in its reduction. The calibration curves of cimetidine HCl in the concentration range between
prepared using three phosphate buffers yielded the slopes of 127,407nA/M (pH 3.01), 115,125nA/M (pH 5.00) and 111,287nA/M(pH 7.00) with excellent linearities of
. When one ampoule of Tagma Inj.
was analyzed by standard addition method by SWV, the within-day precision study (n=4) on the day of sample preparation resulted in the contents of cimetidine as
(102% of the specified contents, RSD of 1.9%) and the inter-day precision (n=4) through 5 days was reasonable as 1.3% of RSD.
Analysis of the hazardous RoHS materials in polyethylene and polypropylene samples by bench-top and portable XRF methods
Choi, Soo-Jung ; Kim, Chong-Hyeak ; Lee, Sueg-Geun ; Kang, In-Sung ;
Analytical Science and Technology, volume 23, issue 1, 2010, Pages 74~82
DOI : 10.5806/AST.2010.23.1.074
As a basic research for development of the domestic portable XRF spectrometer, we discussed the analytical results of bench-top and portable XRF methods for RoHS materials of the Cd, Pb, Hg, Cr(IV), polybrominated biphenyls(PBB) and polybrominated diphenyl ehters(PBDE). The instrumental parameters such as measurement time of bench-top and portable XRF were optimized using certified reference materials of polyethylene and polypropylene with 5 hazardous materials of 0~1,200 mg/kg. The quantitative analysis of total-Cr, total-Br, Cd, Hg and Pb in certified reference materials and plastic samples were compared by empirical method, fundamental parameter method of bench-top XRF and portable XRF.
Analysis of 11-nor-9-carboxy-Δ
-tetrahydrocannabinol in urine with certified reference material
Ko, Beom-Jun ; Kim, Jin-Young ; Kim, Jong-Sang ; Lee, Jeong-Jik ; Cheong, Jae-Chul ; Suh, Sung-Ill ; In, Moon-Kyo ;
Analytical Science and Technology, volume 23, issue 1, 2010, Pages 83~88
DOI : 10.5806/AST.2010.23.1.083
For the evaluation of our laboratory's 11-nor-
-tetrahydrocannabinol-9-carboxylic acid (THCCOOH) urinalysis test, THCCOOH urinalysis test was carried out with Certified Reference Material (CRM). The used CRM was THCCOOH in freeze-dried urine produced by NIST as Standard Reference Material 1507b. Comparing the estimated value of our laboratory with CRM, the results was coincided in the confidence level of approximately 95%.
A study on oil-contaminated fingerprints developing
Choi, Mi-Jung ; Park, Won-Seok ; Kim, Man-Ki ; Jeon, Chung-Hyun ; Park, Sung-Woo ;
Analytical Science and Technology, volume 23, issue 1, 2010, Pages 89~96
DOI : 10.5806/AST.2010.23.1.089
In general, three types of fingerprints could be found at the crime scene: visible, plastic, and latent fingerprints. Examples of visible fingerprint include those made by blood, paint or ink. Plastic fingerprint are made from an impression of the finger on soft material as soap, wax, etc. Latent fingerprint are those of the invisible one to the human eye. Oil-contaminated fingerprints remained in the evidence, that are contaminated with the soybean oil, engine oil, lubricating oil or grease. Oil-contaminated fingerprints are special types of fingerprint evidence but the research for developing method regarding oil-contaminated fingerprints is a few. In this study, ultraviolet light source was employed for untreated oil-contaminated prints and the freeze-dry method with liquid nitrogen for freeze oil residue on the surfaces with sequence of developing oil-contaminated fingerprints with black and magnetic powders, cyanoacrylate (CA) fuming, Basic Yellow 40. The types of oil chosen for the experiment were soybean oil, LSA oil, engine oil and material surfaces selected for the experiment were glass, plastic aluminum plates. The aims of this study were to determine the appropriate developing methods for oil-contaminated fingerprints.
1Determination of optical purity of N-acetyl-1-naphthylethylamine by chiral chromatography and NMR spectroscopy
Jeong, Young-Han ; Ryoo, Jae-Jeong ;
Analytical Science and Technology, volume 23, issue 1, 2010, Pages 97~101
DOI : 10.5806/AST.2010.23.1.097
(R)-N-3,5-dinitrobenzoyl (DNB) phenylglycinol derived chiral selector was used as a HPLC chiral stationary phase (CSP) for the resolution of racemic N-acylnaphthylalkylamines. In this study, determination of optical purity was performed by both chiral chromatography and NMR spectroscopy by using the (R)-phenylglycinol derived chiral selector. The data of accuracy and precision of each optical purity value are calculated from the results of NMR and HPLC experiments by comparing with true value. Average error of the NMR method was +2.2% with average RSD of 4.54%, while that of HPLC method was -3.5% with average RSD of 3.23%.