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REFERENCE LINKING PLATFORM OF KOREA S&T JOURNALS
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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
The distribution characteristics of persistent organic pollutants in incineration residues at solid waste incinerators
Kim, Jong-Hyang ; Lee, Bang-Hee ; Baek, Sung-Bok ; Lee, In-A ; Lee, Sang-Hee ; Park, Kyung-Ho ; Kim, Hyun ;
Analytical Science and Technology, volume 22, issue 2, 2009, Pages 119~127
This study was carried out to investigate the distribution characteristics of persistent organic pollutants in incineration residues at industrial waste incinerators and municipal solid waste incinerators, which were analyzed by the official analytical method for the endocrine disrupting chemicals and the waste. Seven of 12 persistent organic pollutants were quantitatively analyzed by GC-MSD (SIM-mode). Hexachlorobenzene was detected in 21 samples among 44 incineration residues. The level of hexachlorobenzene was 0.132-8.138 ng/g in incineration residues, 0.195-5.765 ng/g in fly ash at industrial waste incinerators, 0.270-1.828 ng/g in bottom ash and 0.154-50.643 ng/g in fly ash at municipal solid waste incinerators, respectively.
The Monitoring of some heavy metals in oriental herbal medicines and their intake rates
Yim, Okkyoung ; Han, Eunjung ; Chung, Jaeyeon ; Park, Kyungsu ; Kang, Inho ; Kang, Sinjung ; Kim, Yunje ;
Analytical Science and Technology, volume 22, issue 2, 2009, Pages 128~135
This paper is the monitoring results of some heavy metals (lead, cadmium, arsenic, mercury) in herbal medicines and their intake rates. The monitoring of lead, cadmium, arsenic and mercury was carried out on 600 samples with 60 kinds of herbal medicines. And the transfer ratio of heavy metals in the water-boiled drinks w as calculated. The results show that lead was detected over the Maximum Residue Limits (MRL) in 10 samples (7 species). Cadmium was detected over the MRM in 69 samples (19 species). Arsenic was detected over the MRM in 3 samples (3 species). Mercury was detected over the MRM in 13 samples (10 species). We need continuously monitoring to ensure confidence and safety for these herbal medicines. In case of the water-boiled drink, average intake rates of lead, cadmium, arsenic and mercury are 9.77%, 6.72%, 26.1% and 6.79%, respectively.
Development of humic acid extraction method in soil and sediment using ultrasonic for
Park, Jiyoun ; Hong, Wan ; Park, Junghun ;
Analytical Science and Technology, volume 22, issue 2, 2009, Pages 136~140
To improve the carbon recovery yield of chemical pretreatment in soil and sediment for
age dating using AMS (Accelerator Mass Spectrometry), we have developed ultrasonic method in chemical pretreatment to replace with stirring method which has been generally used in each step of humic acid extraction for soil and sediment samples. Extraction conditions such as ultrasonic power, temperature and reaction time have been optimized. Six times higher carbon recovery yield could be obtained from low carbon content samples using ultrasonic method. We also compared the dating results by AMS obtained using ultrasonic method with the ages of samples treated by the stirring method. It was found that this new method could be applied to the pretreatment process of low carbon content samples for AMS age dating without effects on the dated ages, and with highly improved carbon recovery yields.
Investigation of the optimum condition for the quantitative analysis of Cu sample by Laser induced breakdown spectroscopy
Kim, Seunghyun ; Shin, Heesung ; Ju, Junesik ; Kim, Hodong ;
Analytical Science and Technology, volume 22, issue 2, 2009, Pages 141~147
A laser induced breakdown spectroscopy (LIBS) measurement was carried out to derive an optimized measurement condition with a high reproducibility and to grow a plasma sphere to 20 mm high under a 600 mtorr vacuum in order to improve an accuracy of measurement. The measurement of the plasma was taken at a 6.0 mm distance, in the direction of a plasma sphere, from a sample. This location belongs to the outer sphere region in the plasma. The calibration curve of 'Ni' and 'Cu' was acquired by the signal intensity ratio and the atomic ratio for the samples, and linear regression of 'Cu' was
=0.9886, and the linear regression of 'Ni' was
=0.9988. The accuracy of LIBS was improved pre-existence as the measurement error of 'Ni' was 0.78%.
Enantiomer separation using a covalently immobilized chiral column derived from polysaccharide derivative by reversed phase liquid chromatography
Huang, Hu ; Jin, Jing Yu ; Baek, Chae-Sun ; Lee, Wonjae ;
Analytical Science and Technology, volume 22, issue 2, 2009, Pages 148~151
Enantiomer separation of N-fluorenylmethoxycarbonyl (FMOC)
-amino acid was performed on covalently immobilized chiral column (Chiralpak IB) based on polysaccharide derivative as a chiral selector by reversed phase liquid chromatography. The effect of the reversed mobile phase on the chromatographic parameters of the enantioselectivities, resolution factors and retention times using covalently immobilized Chiralpak IB was shown. Also the enantiomer separation of N-FMOC
-amino acid in the reversed and normal phase was compared and the results obtained in the former mobile phase were generally lower than those in the latter mobile phase.
Development and characteristics investigation of new soft plasma ionization(SPI) source
Lee, Hiwwon ; Park, Hyunkook ; Lee, Sang Chun ;
Analytical Science and Technology, volume 22, issue 2, 2009, Pages 152~158
In this study, we made a new discharge source improving previous SPI source to ionize softly organic compounds. The new SPI source consists of two electrodes as a hollow mesh cathode of half cylindrical shape and a hollow anode. We optimized the geometrical parameter of the SPI source by investigating the I-V curves at the various distance between the cathode and the anode. As the results, we found stable conditions of the soft plasma on broad range of the current and the voltage. The new SPI source attached to quadrupole mass spectrometer (QMS), and we obtained the mass spectra of dichloromethane (DCM). The fragment patterns of DCM appeared similarly with the pattern of electron ionization (EI).
A thermodynamic analysis on thermochromism of fluoran dyes
Kim, Jae-Uk ; Ji, Myoung-Jin ; Kim, Jong-Gyu ;
Analytical Science and Technology, volume 22, issue 2, 2009, Pages 159~165
The thermochromism of fluoran has been examined. The DCF exists as a colorless lactone in aprotic solvents. However, the DCF exists in the form of an equilibrium mixture of a colored zwitter-ion and a colorless lactone in protic solvents. When an acid is added to the solution, the DCF exists an equilibrium mixture as a colorless lactone and a colored cation even in aprotic solvents. In order to understand the interaction between the DCF and the solvent, absorption spectra of the DCF in various solvents were measured. The thermodynamic parameters of the DCF have also been investigated. From the variation of absorbance with temperature, the standard enthalpy changes
of the equilibrium between the lactone and the zwitter-ion in various solvents have been determined. The standard enthalpy change
is approximately -2.0 kJ/mol in protic solvents. In acidic solution, the standard enthalpy change is measured to be to zero in protic solvents within the experimental error. When the carboxylic group is protonated in acidic solution, a poor interaction between the dye and the solvent is expected.
Evaluation of developing efficiency on latent fingerprint
Kim, Man-Ki ; Park, Sung-Woo ; Ohgami, Yusuke ;
Analytical Science and Technology, volume 22, issue 2, 2009, Pages 166~171
Powder method is simple and very effective method for developing latent finger and palm print in crime scene. This technique has been actively studied to enhance effectiveness. In general, the evaluation for developing powder is mainly performed by the subjective opinion of researcher from comparison of the results obtained with existing and new one to develope finger and palm deposition. The purpose of this work is to present objective method of powder-treated latent fingerprint for evaluating method by developing efficiency. We indicated three evaluating methods of objective developing efficiency, which are measuring the number of minutiae in same sections on print, scattering level of developing reagent and contrast between developing reagent and background materials.
Analysis and management of new hazard chemicals in foods
Choi, Dongmi ; Hu, Soojung ; Suh, Junghyuck ; Yoon, Taehyung ; Kim, Eunju ; Choi, Jangduck ; Park, Sung-Kug ; Lee, Kwangho ;
Analytical Science and Technology, volume 22, issue 2, 2009, Pages 172~185
To help understanding about hazard chemicals occurring newly in food, it has been reviewed characteristics, mechanism, food standards and analytical trend of the hazard chemicals occurring avoidably in food manufacturing process. The new hazard chemicals in food are classified by 4 regarding mechanism such as heat, fermentation, additives and unknowns. The new hazard chemicals by heat process are acrylamide, furan, HCAs and PAHs. By the fermentation, ethylcarbamate and biogenic amines are occurred. According to food additives, 3-MCPD, benzene and nitrosamines can be produced. And the last group is the illegal compounds including anti-impotence drug analogues and anti-obesity drug analogues. To analyze the new hazard chemicals in food, GC or LC with UVD, FLD or MSD are used mainly after sample pretreatment by LLE, SPE or headspace method.
Quantification of sulfur from organic and inorganic materials for determination of
Lee, H.N. ; Kang, S.H. ; Song, B.C. ; Sohn, S.C. ; Jee, K.Y. ;
Analytical Science and Technology, volume 22, issue 2, 2009, Pages 186~190
The oxidation studies of a sulfur to a sulfate ion by various oxyhalide oxidants in organic (thiourea, methionine) and inorganic (sulfate, thiophosphate) compounds were carried out in an acidic solution. The optimized result of the oxidation reaction was obtained when a bromate compound (
) as an oxidant and a 3 M
solvent were used. The chemical yield for the oxidation of the organic and inorganic sulfur compounds to a sulfate ion was monitored as 80% for thiophosphate, 87% for methionine, and 100% for thiourea and sulfate within 5% RSD. The oxidations of thiourea required at least 1.6 equivalents of the bromate in an acidic solution. In the case of the oxidation of methionine and thiophosphate, the oxidation yields were above 80% if the bromate was used at 20 times higher than that of the substrates. The sulfate ion was quantitatively measured by using a GPC counting of
followed by precipitates of
. A quenching correction curve for the
counting was obtained to use the difference via the precipitate weight result.