• Title, Summary, Keyword: inductively coupled plasma-mass spectrometry

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Determination of Rare Earth Elements by Inductively Coupled Plasma Mass Spectrometry with Introduction of Organic Phase Using Ultrasonic Nebulizer (초음파 분무기를 이용한 유기상의 주입에 의한 희토류 원소의 유도결합 플라스마 질량분석법적 정량)

  • Lee, Sang Hak;Son, Bum Mok
    • Analytical Science and Technology
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    • v.15 no.2
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    • pp.127-134
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    • 2002
  • Analytical method to determine rare earth elements which were extracted to organic phase by inductively coupled plasma mass spectrometry(ICP-MS) was investigated. Organic phase which had extracted rare earth elements was directly aspirated into ICP-MS by ultrasonic nebulizer(USN) in order to reduce solvent load to the plasma. Then, the count rate increased when MIBK(methyl isobutyl ketone) was added to EtOH(ethanol) but decreased when 0.03 M HEH(2-ethylhexyl-2-ethylhexyl phosphonic acid, $P_{507}$, PC88A) was added to solvent which mixed MIBK with EtOH. The optimal temperatures of desolvation system were -10 $^{\circ}C$ for the condenser and 150 $^{\circ}C$ for the heating tube. The optimal nebulizer flow rate which gave maximum count rate and minimum reflect power was 0.7 L/min. The optimal pH and extraction time were 4.3 and 10 min for MIBK-0.03 M HEH system. Detection limits which were obtained through calibration curves at the range of 0.2 ${\sim}$ 20 ng/mL were 0.02 ${\sim}$ 0.05 ng/mL under the optimal experimental conditions.

Analytical Techniques Using ICP-MS for Clinical and Biological Analysis

  • Ko, Jungaa;Lim, H. B.
    • Mass Spectrometry Letters
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    • v.6 no.4
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    • pp.85-90
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    • 2015
  • This article reviews recent analytical techniques using inductively coupled plasma-mass spectrometry (ICP-MS) immunoassay for clinical and bio analysis. We classified the techniques into two categories, direct and indirect analysis, which depend upon a guideline of whether tagging materials are used or not. Direct analysis is well known, and generally used in conjunction with various other techniques, such as laser ablation, chromatographic separations, etc. Recently, indirect analysis using tagging elements has intensively been discussed because of its importance in future applications to bio and clinical analysis, including environmental and food industries. The method has shown advantages of multiplex detection, excellent sensitivity, and short analysis time owing to signal amplification and magnetic separation. Now, it expands the application field from small biomolecules to large cells.

Attenuation of Background Molecular Ions and Determination of Isotope Ratios by Inductively Coupled Plasma Mass Spectrometry at Cool Plasma Condition

  • 박창준
    • Bulletin of the Korean Chemical Society
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    • v.18 no.7
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    • pp.706-710
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    • 1997
  • Isotope ratios of K, Ca, Cr and Fe are measured at cool plasma condition generated using high carrier flow rate and relatively low RF power of 900 W. Background molecular ions are suppressed to below 100 counts which give isobaric interference to the analytes. The background ions show different attenuation characteristics at increased carrier flow rate and hence for each element different carrier flow rate should be used to measure isotope ratios without isobaric interference. Isotope ratios are measured at both scan and peak-hopping modes and compared with certified or accepted ratios. The measured isotope ratios show some mass discrimination against low mass due to low ion energy induced from a copper shield to eliminate capacitive coupling of plasma with load coil.

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$^{230}$ Th/$^{234}$ U disequilibrium dating of fracture-filling carbonate veins from the Ipsil and Janghangri fault zones, Gyeongju, Korea by multiple collector inductively coupled plasma mass spectrometry (다검출기 유도결합 플라즈마 질량분석기를 이용한 경주 입실, 장항리 단층 파쇄대 충진 탄산염암 맥의 $^{230}Th/^{234}U$ 비평형 연대측정)

  • 정창식;최만식;김현철;임상복
    • The Journal of the Petrological Society of Korea
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    • v.10 no.3
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    • pp.148-156
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    • 2001
  • We report $^{230}Th/^{234}U$ disequilibrium ages of fracture-filling carbonate veins from the Ipsil and Janghangri fault zones, Gyeongju, Korea by multiple collector inductively coupled plasma mass spectrometry. The U and Th fraction was extracted from totally dissolved samples by rapid and convenient coprecipitation and ion exchange chemistry. The recovery was around 80% for Th and 70% for U. The $^{234}U/^{238}U,\;^{230}Th/^{232}Th$ ratios were analysed for this preconcentrated fraction and the U/Th ratio was directly analysed for untreated sample solution. The $^{234}U-^{230}Th$ system is in secular equilibrium for the Ipsil carbonate samples, supporting previously reported ESR ages. The detrital-corrected $^{230}Th/^{234}U$ age of the Janghangri carbonate samples is $48\pm$41 ka, which constrains the minimum age of the fracture zone.

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Feasibility Study of Isotope Ratio Analysis of Individual Uranium-Plutonium Mixed Oxide Particles with SIMS and ICP-MS

  • Esaka, Fumitaka;Magara, Masaaki;Suzuki, Daisuke;Miyamoto, Yutaka;Lee, Chi-Gyu;Kimura, Takaumi
    • Mass Spectrometry Letters
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    • v.2 no.4
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    • pp.80-83
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    • 2011
  • Isotope ratio analysis of nuclear materials in individual particles is of great importance for nuclear safeguards. Although secondary ion mass spectrometry (SIMS) and thermal ionization mass spectrometry (TIMS) are utilized for the analysis of individual uranium particles, few studies were conducted for the analysis of individual uranium-plutonium mixed oxide particles. In this study, we applied SIMS and inductively coupled plasma mass spectrometry (ICP-MS) to the isotope ratio analysis of individual U-Pu mixed oxide particles. In the analysis of individual U-Pu particles prepared from mixed solution of uranium and plutonium standard reference materials, accurate $^{235}U/^{238}U$, $^{240}Pu/^{239}Pu$ and $^{242}Pu/^{239}Pu$ isotope ratios were obtained with both methods. However, accurate analysis of $^{241}Pu/^{239}Pu$ isotope ratio was impossible, due to the interference of the $^{241}Am$ peak to the $^{241}Pu$ peak. In addition, it was indicated that the interference of the $^{238}UH$ peak to the $^{239}Pu$ peak has a possibility to prevent accurate analysis of plutonium isotope ratios. These problems would be avoided by a combination of ICP-MS and chemical separation of uranium, plutonium and americium in individual U-Pu particles.

A study on the etch characteristics of BST thin films using inductively coupled plasma (유도결합 플라즈마를 이용한 BST 박막의 식각 특성 연구)

  • Kim, Gwan-Ha;Kim, Kyoung-Tae;Kim, Chang-Il;Kim, Tae-Hyung;Lee, Chul-In
    • Proceedings of the Korean Institute of Electrical and Electronic Material Engineers Conference
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    • pp.22-25
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    • 2004
  • In this study, BST thin films were etched with inductively coupled $CF_4/(Cl_2+Ar)$ plasmas. The etch characteristics of BST thin films as a function of $CF_4/(Cl_2+Ar)$ gas mixtures were analyzed using quadrupole mass spectrometry (QMS) and optical emission spectroscopy (OES). The maximum etch rate of the BST thin films was 53.6 nm/min because small addition of $CF_4$ to the $Cl_2/Ar$ mixture increased chemical effect. The optimum condition appears to be under a 10 % $CF_4/(Cl_2+Ar)$ gas mixture in the present work.

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Determination of Cd and Pb in Human Blood by Isotope Dilution Inductively Coupled Plasma Mass Spectrometry : International Comparison (동위원소희석 질량분석법에 의한 혈액 중 Cd, Pb 성분의 측정 : 국제공동분석)

  • Park, C.J.;Suh, J.K.;Lee, S.H.
    • Analytical Science and Technology
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    • v.9 no.2
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    • pp.145-160
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    • 1996
  • Inorganic analytical laboratory of Korea Research Institute of Standards and Science participated in an interlaboratory comparison program operated by Quebec Toxicology Centre of Canada in 1994 and again in 1995. The objective of this program is to enable participating laboratories to assess reproducibility and accuracy of their analytical results for trace toxic elements in human biological fluids. This laboratory determined Cd and Pb concentrations in 3 levels of human blood samples by isotope dilution inductively coupled plasma mass spectrometry. 0.5mL of blood sample is added to the digestion bomb together with 2mL of nitric acid and enriched spike isotopes and then decomposed in the microwave digestion system. The decomposed sample is diluted to 10mL and nebulized into ICP-MS. The Cd and Pb values reported by all participating laboratories are presented and compared. The values reported by this laboratory are within the acceptable range of target values.

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The simultaneous determination of germanium and selenium in plant by hydride vapour generator inductively coupled plasma mass spectrometry (HVG-ICPMS을 이용한 식물체 중 게르마늄과 셀레늄의 동시분석 연구)

  • Ham, Yong-Gyu;Kim, Bo-Kyong;Kwon, Young-Uk;Baek, Hyo-Hyu;Lee, Seok-Ki
    • Analytical Science and Technology
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    • v.24 no.3
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    • pp.159-167
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    • 2011
  • In this study, the hydride vapour generator inductively coupled plasma mass spectrometry (HVGICPMS) was applied as the new analytical method to show the high accurate and reproductive data analysing the amounts of selenium and germanium being existed inside a system of plant. In order to decrease the interference effects, such as ion and molecular interference. Mini torch was used into the ICPMS instead of the conventional torch. At conditions of the different kinds and concentrations of acid solution, the different reductive conditions for composing hydride, and the different methods for making ash, the contents of selenium and germanium in lettuce were analysed. The inspection of yields and data comparison from SRM-1574 and -1570a were used for increasing the accuracy of this analysis.

A Study of Analytical Method for Trace Metal Ions in Whole Blood and Urine by Inductively Coupled Plasma-Mass Spectrometry using Solid-Liquid Extraction Technique (유도결합 플라스마-질량분석법과 고체-액체 추출법을 이용한 혈액 및 소변중 미량금속의 분석에 관한 연구)

  • Lee, Won;Hur, Young-Hoe;Park, Kyung-Su
    • Analytical Science and Technology
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    • v.11 no.4
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    • pp.281-291
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    • 1998
  • An analytical method for the simultaneous measurement of trace Cu, Sn, and Bi in blood and urine has been investigated by Inductively Coupled Plasma-Mass Spectrometry (ICP-MS). Microwave oven was used for the pretreatment of blood samples using nitric acid and hydrogen peroxide in a closedvessel digestion system with 1 mL whole blood for 8 minutes. Amberlite IRC-718 resin was used as a solid phase in solid-liquid extraction technique for the removal of matrix interferences such as Na, S, P, and other polyatomic ion species. Detection limits for Cu, Sn, and Bi by this method were 0.000375 ng/mL, 0.000297 ng/mL, and 0.000174 ng/mL, respectively. Recoveries of 99.1% for Cu, 102.5% for Sn, and 98.4% for Bi were obtained for the standard spiked NIST SRM 955a blood sample. The developed method was applied for whole real blood and urine samples.

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