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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
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Volume & Issues
Volume 14, Issue 6 - 00 2001
Volume 14, Issue 5 - 00 2001
Volume 14, Issue 4 - 00 2001
Volume 14, Issue 3 - 00 2001
Volume 14, Issue 2 - 00 2001
Volume 14, Issue 1 - 00 2001
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Review : Analytical Methods and Characteristics of Brominated Flame Retardants in Environments
Jang, Seong-Gi ; Sin, Seon-Gyeong ;
Analytical Science and Technology, volume 14, issue 5, 2001, Pages 83~83
Analysis of the Change of Polyamine during the ABA Treatment in Radish Young Cotyledons and Hypocoryls
Analytical Science and Technology, volume 14, issue 5, 2001, Pages 258~258
Quantitative Analysis of Total Phenolic Content in Apple
Whang, Hea-Jeung ; Han, Wan-Soo ; Yoon, Kwang-Ro ;
Analytical Science and Technology, volume 14, issue 5, 2001, Pages 377~383
Total amounts of phenolic compounds of Korean apples were determined by UV-visible spectrphotometry of Folin-Dennis, Prussian-blue and vanillin-HCI, respectively. The analytical data from the method of Folin-Dennis were estimated to be the most reasonable to determine the total amounts of phenolic compounds in Korean apples. It was also confirmed that the amounts of total phenolics could be calculated as chlorogenic acid equivalence, more effectively than that of other phenolic compound equivalence.
Quantitative Analysis of Acylcarnitines and Amino Acids Using ESI-MS/MS
Kim, Hohyun ; Han, Sang-Beom ; Yoon, Hye-Ran ;
Analytical Science and Technology, volume 14, issue 5, 2001, Pages 384~391
In this study, a new quantitative analytical method has been developed for the rapid determination of acylcarnitines and amino acids in human blood using electrospray ionization / tandem mass spectrometry (ESI-MS/MS). Acylarmitines and amino acids were analyzed by tandem mass spectrometry after conversion to their butylesters through treatment with 3N butanolic hydrogen chloride. Acylcrnitines were analyzed using precursor 85 ion scan and alanine, valine, leucine/isoleucine, methionine, phenylalanine, tyrosine, aspartic acid and glutamic acid were analyzed using neutral loss 102 scan, ornitine and citrulline were analyzed neutral loss 119 scan, glycine was analyzed using neutral loss 56 scan, arginine was analyzed using neutral loss 161 scan and argininosuccinic acid was analyzed product ion 459 scan. This method reduced sample preparation time compared to that with conventional amino acid analyzer and liquid chromatography, with high sensitivity and good reproducibility.
Comparison Solid Phase Microextraction with Purge & Trap on the GC/MS Analysis of Volatile Organic Compounds in Biota Samples
Ahn, Yun-Gyong ; Seo, Jong-Bok ; Hong, Jongki ;
Analytical Science and Technology, volume 14, issue 5, 2001, Pages 392~399
The analysis of n-butylbenzene and 1,2-dibromo-3-chloropropane (DBCP) as volatile organic compounds in biota samples was performed by gas chromatography/mass spectrometry-selected ion monitoring mode. The target compounds, n-butylbenzene and DBCP, in biota samples were extracted by headspace solid phase microextraction (SPME) with
polydimethyl siloxane (PDMS) fiber and purge & trap method. The extraction recoveries of these compounds obtained by SPME was 85.8% for n-butylbenzene and 92.4% for DBCP, respectively. Each value of method detection limit were
, respectively. While in the case of purge & trap method, the extraction recovery was 115.2% for n-butylbenzene, 80.9% for DBCP and method detection limit were
, respectively. The extraction yields and detection limits of these compounds obtained by purge & trap were equivalent to those by SPME.
Determination of Phthalates in Biota Samples Using Gas Chromatography/Mass Spectrometry
Seo, Jung-Ju ; Na, Yuncheol ; Hong, Jongki ;
Analytical Science and Technology, volume 14, issue 5, 2001, Pages 400~409
A method for the analysis of most common phthalate acid esters (9 secies) in biota samples by gas chromatography-mass spectrometry-selected ion monitoring mode is described. Phthalates in biota samples are extracted by organic solvent and purified by Florisil column. Phthalates are easily contaminated during extraction prodedure. Since the extraction and cleanup steps for biota samples generally are more complicate than those for water or sediment samples, we compared with contamination state of each sample work-up step. By applying this developed method, the overall recoveries ranged between 79 - 117% in biota sample which was spiked with standards. For phthalates used in this study, the quantitaive accuracy, elution pattern on Florisil column, and detection limits were also investigated.
Determination of Lead in Steels by Hydride generation-Inductively Coupled Plama/Mass Spectrometry
Park, Chang Joon ; Song, Sun Jin ; Lee, Dong Soo ;
Analytical Science and Technology, volume 14, issue 5, 2001, Pages 410~415
An analytical method has been developed which determines lead in steel samples by inductively coupled plasma mass spectrometry (ICP-MS) with sample introduction by the hydride generation. The lead hydride is not stable and requires and oxidant for the oxidation into metastable Pb(IV) before reduction to
. A study was carried out to find and optimum lead hydride generation condition for a sample solution with more than
was found to work as an efficient oxidant when more than
Fe matrix was present. Lactic acid was used with the oxidant as a complexing agent of the metastable Pb(IV) to enhance sensitivity. Optimum concentrations of the sample acidity, oxidant and lactic acid were different depending on the matrix concentration. The isotope dilution method was employed for the quantitation of lead. The determined Pb concentrations of the NIST steel SRM 361 and 362 were in good agreement with the certified values within the uncertainty range.
Effect of Fluoride Ion in the Analysis of Tin by HG-ICP-AES
Lim, Heon-Sung ; Cho, Sung-Il ; Lee, Sueg-Geun ;
Analytical Science and Technology, volume 14, issue 5, 2001, Pages 416~421
The optimization of the reductant and acid concentration for stannane(
) generation was investigated by using a continuous flow hydride generator combined with an inductively coupled plasma-atomic emission spectrometer. Several different prereductants were studied to remove the interfering effect of fluoride ion on the hydride generating of tin. The optimum acid concentration was 0.5-1.0 M for the 1-2%
and 1.0 M NaOH and the interfering effect of fluoride ion was minimized using boric acid and L-cysteine mixed solution as a prereductant. The reconveries of tin at 20 ng/mL level in the solution containing fluoride ion were 100~108 %.
Emission Patterns and Formation Mechanism of PCDDs/PCDFs in Bleaching Wastewater(I) - Alkali Wastewater -
Shin, S.K. ; Jang, S.K. ;
Analytical Science and Technology, volume 14, issue 5, 2001, Pages 422~431
One pulp manufacture facility was selected as surveying facility to examine the discharged amount and generation mechanism of dioxins excepts for bleaching stage wastewater. In recovery and finishing process, 2,3,7,8-TCDF, OCDD and OCDF were mainly detected, and the ratio of PCDDs and 1,2,3,4,7,8-HxCDD as the concentration of 2,3,7,8-substitute isomer were discharged which is known as the typical emission pattern of pulp and paper manufacture facility, and the 1,2,3,7,8-PeCDD and 1,2,3,4,7,8-HxCDD were discharged more than 90% in toxic equivalent concentration. Also, the OCDD and 2,3,7,8-TCDF for 2,3,7,8-isomer concentration, and 1,2,3,7,8-PeCDD and 2,3,7,8-TCDF as toxic equivalent concentration were discharged in effluent. The detected PCDDs/PCDFs concentration were surveyed 0.2266 ng-TEQ/L for influent and 0.0377 ng-TEQ/L for effluent.
Development of Portable Preconcentration-Gas Chromatography System for Fast Analysis of Trace Benzene, Toluene and Xylene in Air
Jung, Young-Rim ; Kim, Man-Goo ;
Analytical Science and Technology, volume 14, issue 5, 2001, Pages 432~441
An automated on-line portable preconcentration-short column gas chromatograph was developed, which used preconcentrator using adsorption tube with Tenax-GR and Curie-point heating. The developed system operated with 3 steps of processing, preconcentration, thermal desorption, and analysis and cleaning, and could continued operating within 1~2 min cycle. The recoveries of preconcentrator for toluene was ranged between
with less than 7% of RSD. For benzene, toluene and xylene(BTX) standard gas test, IDL was 41, 49,
benzene, toluene and o-xylene, respectively. The BTX mixture was analyzed within 30 sec with baseline separation by the system equipped with 4 m long capillary column. The deficiency of separation power caused by short column was solved by the control of sample injection volume and inlet/outlet pressure ratio. The automated portable preconcentration-short column gas chromatograph system was found to be useful for the continuous air monitoring of BTX at ppb levels in ambient air.
Distribution Characteristics of Heavy Metals in the Ambient Air of Ulsan Area
Moon, Ji-Yong ; Kim, Young-Bok ; Lee, Ji-Young ; Jeong, Gi Ho ;
Analytical Science and Technology, volume 14, issue 5, 2001, Pages 442~450
In this study, we collected PM10(particulate matter less than
) by using a high volume air sampler from March 2000 to September 2000 to investigate the contamination level and the distribution characteristics of heavy metals in the ambient air in Ulsan area. Samples were pretreated by the microwave extraction methods, and heaby metals (Cr, Cu, Zn, Cd, Ni, As, and Pb) were quantified by using and ICP-MS system. The highest PM10 concentrations in the ambient air were
and the aberage value was
. The maximum levels of each heavy metal were as follows:
for Cr(Yaeum-dong), and
for As(Onsan). Among concentration of heavy metals, Ni and Zn compounds were highly correlated with a correlation coefficient of 0.87 at Nammok-2-dong.
Loss of Metalworking Fluids Collected on PVC Filter Due to Contact with Clean Air and Desiccation
Park, Dong-Uk ; Ha, Kwon-Chul ;
Analytical Science and Technology, volume 14, issue 5, 2001, Pages 451~457
Because liquids with high molecular weight such as mineral oil have low vapor pressure at room temperature, it is generally thought to be difficult to lose them to evaporation. However, when they are dispersed into air in small droplets during application in machining processes, their surface area becomes considerably higher. To determine the potential for metalworking fluids (MWF) filter losses, MWF mist was generated and collected on polyvinyl chloride (PVC) filters in test chamber. After collected MWF was exposed to clean air during designated period (range 10~240 minutes) and the filters were desiccated, losses were evaluated. As duration of clean air passing through PVC filter increased, loss of MWF gradually increased. MWF lost after 10 minutes ranged form 12.4 % to 21.8 % of the original loading mass, on average 53.3 % of the total loss. These results indicate that significant mass of MWF collected on PVC filters can be lost at the beginning of air sampling. Loss of MWF collected on PVC filter also occurred during desiccation without active airflow. In multiple regression to identify which factors influence the loss of MWF collected on PVC filter, both duration of air passing through PVC filter and MWF age (fresh vs. used) were significant predictor (p=0.0001). Therefore, workers' exposure to MWF measured method 0500, may underestimate true concentration. Further study is needed to develop a new method to quantify the workers' exposure to airborne MWF mist accurately.