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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
Proficiency testing of cadmium and lead in polypropylene resin
Cho, K.H. ; Lim, M.C. ; Min, H.S. ; Han, M.S. ; Song, H.J. ; Park, C.J. ;
Analytical Science and Technology, volume 20, issue 3, 2007, Pages 183~192
The various environmental regulation directives such as RoHS (restriction of hazardous substances in electrical and electronic products) and WEEE (waste from electrical and electronic equipments) are practically used as the technical barrier in international trade (TBT) of vehicles and electrical and electronic products recently. Regarding such an environmental regulation, Korea Research Institute of Standards Science (KRISS) organized a proficiency testing scheme to establish the reliability of measurement results produced by the relevant research institutes and test laboratories in Korea. Participants were 31 laboratories related to production of the electrical and electronic equipments and mobile vehicles. Two polypropylene samples of pellet type were employed as the proficiency testing materials (PTMs). Cadmium and lead were the analytes chosen among six components regulated in European Union (EU) RoHS directive. The PTMs were sent to the participants by post on September
2006, and deadline for results submission were October
2006. The results of each laboratory were evaluated in comparison with KRISS reference values using Robustic Z-score and Youden plot methods. The results of the various sample digestion methods were also compared. Most of participants reported good agreement within 10 % range of reference values. However, results from several laboratories showed significant biases from reference values. These laboratories should establish the quality assurance system for improvement of the measurement reliability.
Adsorption of phenol on metal treated by granular activated carbon
Kang, Kwang Cheol ; Kim, Jin Won ; Kwon, Soo Han ; Kim, Seung Soo ; Baik, Min Hoon ; Choi, Jong Won ;
Analytical Science and Technology, volume 20, issue 3, 2007, Pages 193~197
In this study, the effect of metal treatment on granular activated carbon (GAC) was investigated in the context of phenol adsorption. Cobalt(II) nitrate, and zinc(II) nitrate solution were used for metal treated. The specific surface area and the pore structure were evaluated from nitrogen adsorption data at 77 K. The phenol adsorption rates onto GAC were measured by UV-Vis spectrophotometer. Iodine adsorption capacity of Co-GAC is much better then that of the GAC. The Co-GAC with mesopore is more efficient than other adsorbents for the adsorption of polymer such as methyleneblue. The adsorption capacity of reference-GAC and metal-GAC were increased in order of Co-GAC>Zn-GAC>Reference-GAC, in spite of a decrease in specific surface area which was resulted from pore blocking by metal.
Quantitative analysis of 3-MCPD in water using LC-MS
Park, Gyo-Beom ; Kim, Yong-Hwa ; Kim, Jin-Sung ; Jeong, Ja-Young ; Kim, Choong-Yong ; Lee, Sueg-Geun ;
Analytical Science and Technology, volume 20, issue 3, 2007, Pages 198~203
The analysis method of 3-Monochloropropane-1,2-diol (3-MCPD) compound in water was developed using liquid chromatography with mass spectrometric detection. Aqueous solution was controlled in strong basic condition with sodium hydroxide, and then
of benzoyl chloride was added to the solution for the derivatization of 3-MCPD. The derivative was extracted using pentane and analyzed by the selected ion monitoring (SIM) method of LC-MS. The results of analyses showed that the calibration curves was in the range of 1.0 to
with a good linearity (correlation coefficient of
) and limit of detection was below
. The recoveries of this analysis method by LC-MS were 92.3-98.0 %.
Study on the confirmation of drinking at the bloods & urines used 5-hydroxyindole-3-acetic acid and 5-hydroxytryptophol
Kim, Myung-Duck ; Kim, Young-Woon ; Kwon, O-Sung ; Park, Se-Youn ; Kim, Eun-Ho ;
Analytical Science and Technology, volume 20, issue 3, 2007, Pages 204~212
The study was carried out to investigate the ratio of ethanol to n-propanol in blood and urine specimens, and developed a method for distinguishing ingested ethanol from artifactual ethanol in urine samples. In case of no urinary ethanol was detected, the ratio of ethanol to n-propanol concentration was about 12~20 times higher than those of blood. Therefore, it might be a good method to determine whether the detected ethanol is from drinking or from microbial fermentation. During the metabolism of ethanol, the levels of the metabolite of serotonin (5-hydroxytryptamine, 5-HT) and 5-hydroxyindole-3-acetic acid (5-HIAA) were decreased, while 5-hydroxytryptophol (5-HTOL) was increased. The levels of 5-HTOL/5-HIAA in urine samples of drinking suspects were greater than 1, in that of no drinking suspects were less than 1.
Determination of Copper(II) ion with a nafion-ethylenediamine modified glassy carbon electrode
Ko, Young Chun ; Kim, Hee Cheol ;
Analytical Science and Technology, volume 20, issue 3, 2007, Pages 213~218
Copper(II) ion was measured with the use of a perfluorinated sulfonated polymer-ethylenediamine (nafion-en) modified glassy carbon electrode. The electrode mechanism was based on the chemical reactivity of an immobilized layer (nafion-en) to yield complex
. The reduction potential peak by differential pulse voltammetry(DPV) was observed at -0.4402V(
) (vs. Ag/AgCl). The linear calibration curve was obtained from
copper(II) ion concentration, and the detection limit(3s) was
Natural isotopes and trace element analyses in glass samples
Min, Ji-Sook ; Heo, Sangcheol ; Kim, Jae-Guin ; Kim, Eun-Ho ; Kim, Dong-Wook ; Chung, Hee-Sun ;
Analytical Science and Technology, volume 20, issue 3, 2007, Pages 219~226
Glass is frequently encountered as types of materials that are submitted to forensic science laboratories as a result of trace evidence transfers. The repeatability and the reproducibility of trace element analysis were presented. An analysis of variance (ANOVA) was performed on laser ablation inductively coupled plasma spectrometric analyses of the fragments to identify the source. Pairwise comparisons were completed for all samples. In a pairwise comparison, each sample was compared to each other for a possible [n(n-1)/2] (n : numbers of the samples) total comparison to associate/discriminate samples using Tukey's HSD method. The aim of this study was to determine the utility of LA-ICP-MS for multi-element analysis of forensic samples. The 12 glass fragments from two manufacturers were collected and analyzed to identify the source. An analysis of variance (ANOVA) was performed on 31 elements in NIST 612 Trace elements in Glass. Elements were classified into four categories defined by the combination of precision and variation of inter-samples. We selected 11 elements, 209Bi, 90Zr, 121Sb, 178Hf, 59Co, 238U, 208Pb, 140Ce, 118Sn, 49Ti and 137Ba. 6 pairs out of 66 possible pairs were not distinguished when compared by 137Ba (p<0.05). However, all samples were distinguished using both 49Ti and 137Ba (p<0.05). In conclusion, multi-elemental analysis with LA-ICP-MS is a potential tecnique for the discrimination of forensic samples.
Contents of lead, mercury, and cadmium in seaweeds collected in coastal area of Korea
Hwang, Young Ok ; Kim, Mu Sang ; Park, Seog Gee ; Kim, Su Jeong ;
Analytical Science and Technology, volume 20, issue 3, 2007, Pages 227~236
This study was carried out to estimate the contents of heavy metals (Hg, Pb, and Cd) in seaweeds (n=169) which are closely related to food resources. The contents of heavy metals in the laver were found as follows; Hg was highly detected in the east coastal area (
), Pb in the south coastal area (
), Cd in the south coastal area (
). In the sea mustard, Hg was highly detected in the south coastal area (
), Pb in the east coastal area (
), Cd in the south coastal area (
). In the sea tangle, Hg was highly detected in the south coastal area (
), Pb in the east coastal area (
), Cd in the south coastal area (
). In the sea lettuce, Hg, Pb, and Cd were highly detected from the west coastal area. In the fusiforme, Hg and Cd were highly in the west coastal area, Pb in the south coastal area. In general brown algae showed the highest level of Hg, Pb, and green algae showed the highest level of Cd Additionally, the significant correlation was observed between Hg and Cd (r=0.513, p<0.01), between Cd and Pb (r=0.420, p<0.05). The weekly average intakes of Hg, Pb and Cd from seaweeds takes about 0.17~10.30 % of PTWI (Provisional Tolerable Weekly Intakes) that FAO/WHO Joint Food Additive and Contaminants Committee has set to evaluate their safeties.
Determination of the presence of benzene in vitamin drinks using headspace - solid phase microextraction and gas chromatography - mass spectrometry
Kim, Jong-Hun ; Lee, Kyung-Min ;
Analytical Science and Technology, volume 20, issue 3, 2007, Pages 237~245
The presence of benzene in 31 products of vitamin drinks purchased from 20 retail outlets was determined using headspace solid phase microextraction (HS-SPME) and gas chromatography-mass spectrometry (GC-MS). The sample (25 ml) was stirred at 1200 rpm for 4 min using a magnetic bar with a
SPME fiber as an adsorbent for benzene which was then desorbed from the fiber for 1 min in the GC injector. Quantitation was achieved using the standard addition method. The limit of detection was determined as 0.56 ng/ml and over a concentration range 0-40 ng/ml the coefficient of correlation was greater than 0.999. The concentration of benzene in the drinks examined was in the range not detectable to 47.35 ng/ml. Benzene was detected in 15 of the drinks with concentration in 5 of them greater than 10 ng/ml which is the limit set for the presence of benzene in the Drinking Water Regulations. The concentrations of benzene in the 5 drinks which exceeded the limit of 10 ng/ml were 16.99, 35.14, 16.03, 47.35 and 14.28 ng/ml respectively.
Separation and analysis of Cr(III) and Cr(VI) using 8-hydroxyquinoline complexation of Cr(III)
Lim, Heon-Sung ; Lee, Sueg-Geun ;
Analytical Science and Technology, volume 20, issue 3, 2007, Pages 246~250
The quantitative determination of chromium(VI) by separation from chromium(III) complex of 8-hydroxyquinoline using solvent extraction has been studied. The reaction conditions for chromium(III) complex of 8-hydroxyquinoline and the solvent extraction of complex were investigated in detail. The chromium(III) complex was extracted with organic solvent (n-hexane) and residual chromium(VI) was determined by ICP-AES in aqueous layer. This technique is quantitative in the pH range of 8-9 and the limitations such as interfering ions were discussed.
Determination of osmium using sulfurous acid as reductant by ICP-AES
Park, Han-Seok ; Kim, Kang-Jin ;
Analytical Science and Technology, volume 20, issue 3, 2007, Pages 251~254
In this study, a convenient, fast and accurate inductively coupled plasma atomic emission spectrometry (ICP-AES) method has been optimized for the determination of osmium in aqueous solutions. The method makes use of the reaction of sulfurous acid with osmium to quantitative conversion of volatile Os(VIII) to non-volatile Os(IV) in the pH range 2-10. The response was found to be stabilized immediately after sulfurous acid reacted with osmium. The precision was calculated to be 0.5-4.5 % (RSD) under various ICP-AES conditions. The detection limit was 2.5-57.7 ng/g based on
of the blank response (n=3) using a concentric flow nebulization.
Simultaneous determination of low molecular weight amines and quaternary ammonium ions by IC/ESI-MS
Jung, Joo-Young ; Park, Han-Seok ; Kim, Kang-Jin ;
Analytical Science and Technology, volume 20, issue 3, 2007, Pages 255~260
A new method for the simultaneous determination of low molecular weight amines and quaternary ammonium ions based on the separation by IC with a suppressor and the detection by MS with ESI has been developed. The method has been applied to the analysis of a mixture containing tetramethylammonium ion, tetraethylammonium ion, tetrapropylammonium ion, triethanolamine, trimethylamine and triethylamine. The constituents were separated by isocratic elution using an IonPac CS17 column, a cation-exchange column, and detected by conductivity and mass spectrometry. The newly developed method for the six components demonstrated that the repeatability in terms of relative standard deviation for three measurements was in the range of 0.1-0.5 %. The detection limits were between 0.2 and
by the IC/ESI-MS.