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High sensitivity measurement in plasma spectrometry by gas flow modulation technique

Research Project

Project/Area Number 09640713
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 分離・精製・検出法
Research InstitutionTOHOKU UNIVERSITY

Principal Investigator

WAGATSUMA Kazuaki  Institute for Materials Research, Tohoku University, Associate Professor, 金属材料研究所, 助教授 (30158597)

Co-Investigator(Kenkyū-buntansha) MATSUTA Hideyuki  Institute for Materials Research, Tohoku University, Research Associate, 金属材料研究所, 助手 (00181735)
Project Period (FY) 1997 – 1999
Project Status Completed (Fiscal Year 1999)
Budget Amount *help
¥3,000,000 (Direct Cost: ¥3,000,000)
Fiscal Year 1999: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1998: ¥600,000 (Direct Cost: ¥600,000)
Fiscal Year 1997: ¥1,800,000 (Direct Cost: ¥1,800,000)
KeywordsInductively-coupled atomic emission spectrometry / Glow discharge optical emission spectrometry / Modulation spectroscopy / Detection limit / Plasma gas flow / Bias current / 放電電力変調法
Research Abstract

ICP-AES (inductively-coupled plasma atomic emission spectrometry) is extensively applied to quantitative analysis for materials research. To improve the determination limits further, increases in the signal-to-background ratio as well as the signal-to-noise ratio are necessary. In ICP-AES, both of them can be obtained from accurate estimation in the emission intensities. Modulation spectroscopy is suitable for this purpose, because only the modulated component can be detected to remove any noises. In this work, we suggest a new detection system for ICP-AES by using a plasma gas flow modulation technique in which cyclic introduction of air gas into the Ar-ICP produces the modulated component of the emission signals. The determination limits are improved by a factor of 10 or more compared to that in the conventional detection method.
GD-OES (glow discharge optical emission spectrometry) is employed for direct determination of solid samples. To better the determination limits, we develop the bias-current modulation technique in the radio-frequency glow discharge source. D.c. currents can be conducted into the plasma by connecting a low-pass filter circuit and a load resister and then the currents can be modulated by using a switching circuit, leading to the modulated component of the emission signals. The determination limits are improved by a factor of 20-50 compared to those in the conventional detection method.

Report

(4 results)
  • 1999 Annual Research Report   Final Research Report Summary
  • 1998 Annual Research Report
  • 1997 Annual Research Report
  • Research Products

    (45 results)

All Other

All Publications (45 results)

  • [Publications] K.Kubota: "Application of plasma gas flow modulation technique for accurate estimation of the emission intensities in ICP-AES"Analytical Sciences. 16 (in press). (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] H.Matsuta: "Characteristics of a 40.68-MHz ratio frequency boosted low power glow discharge lamp"Spectrochimica Acta Part B. 54B. 1783-1792 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] K.Wagatsuma: "Control of d. c. bias current in radio-frequency glow discharge source and its emission characteristics"Spectrochimica Acta Part B. 54B. 527-535 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] K.Wagatsuma: "Analytical performance of a radio-frequency-powered glow discharge excitation source associated with bias voltage modulation"Fresenius J. Analytical Chemistry. 363. 333-338 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] K.Wagatsuma: "Application of a bias current modulation technique to radio-frequency glow discharge optical emission spectrometry"Analytical Sciences. 15. 517-523 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] K.Wagatsuma: "Depth profiling of surface layers using the amplitude modulation method in radio-frequency-powered glow discharge optical emission spectrometry"Surface and Interface Analysis. 27. 63-67 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] 我妻和明: "自己バイアス電流導入法による高周波グロー放電発光分析法における検出限界の改善"鉄と鋼. 85. 34-38 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] H.Matsuta: "Advanced helium glow discharge emission source by conduction d.c. self-bias current in the 13.56-MHz radio frequency plasma"Analytical Sciences. 15. 319-320 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] 我妻和明: "バイアス電圧制御型高周波グロー放電励起源の分光特性と発光分析への応用"分析化学. 48. 95-101 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] K.Wagatsuma: "Analytical performance of high-voltage neon plasma in glow discharge optical emission spectrometry"Fresenius J. Analytical Chemistry. 364. 780-782 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] 我妻和明: "グロー放電発光分析法と誘導結合プラズマ発光分析法におけるランタノイド元素の分光特性の比較"分析化学. 48. 349-363 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] K.Wagatsuma: "Non-Boltzmann distribution among energy levels of singly-ionized vanadium in dc glow discharge and rf inductively coupled dicharge plasmas"J. Analytical Atomic Spectrometry. 14. 1727-1730 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] K.Wagatsuma: "Glow Discharge Optical Emission Spectrometry (分担執筆)"John Wiley & Sons,Ltd.. 21(854) (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] K. Kubota and K. Wagatsuma: "Application of plasma gas flow modulation technique for accurate estimation of the emission intensities in ICP-AES"Analytical Sciences. (to be submitted). (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] H. Matsuta, K. Kitagawa, and K. Wagatsuma: "Characteristics of a 40.68-MHz radio frequency boosted low power glow discharge lamp"Spectrochimica Acta Part B. 54B. 1783-1792 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] K. Wagatsuma and H. Matsuta: "Control of d.c. bias current in radio-frequency glow discharge source and its emission characteristics"Spectrochimica Acta Part B. 54B. 527-535 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] K. Wagatsuma and H. Matsuta: "Application of a bias-current modulation technique to radio-frequency glow discharge optical emission spectrometry"Analytical Sciences. 15. 517-523 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] K. Wagatsuma: "Analytical performance of a radio frequency-powered glow discharge excitation source associated with bias voltage modulation"Fresenius J. Analytical Chemistry. 363. 333-338 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] H. Matsuta and K. Wagatsuma: "Advanced helium glow discharge emission source by conducting d.c. self-bias current in the 13.56 MHz radio frequency plasma"Analytical Sciences. 15. 319-320 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] K. Wagatsuma: "Improvement of the detection limits in radio-frequency-powered glow discharge optical emission spectrometry associated with bias-current conduction method"Tetsu-to-Hagane (in Japanese). 85. 34-38 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] K. Wagatsuma: "Regulating of bias voltage of an r.f.-powered glow discharge excitation source and the emission characteristics"Bunseki Kagaku (in Japanese). 48. 95-101 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] K. Wagatsuma: "Depth profiling of thin surface layers using the amplitude modulation method in radiofrequency-powered glow discharge optical emission spectrometry"Surface and Interface Analysis. 27. 63-69 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] K. Wagatsuma, Y. Danzaki, and N. Yamashita: "Comparison of emission characteristics for lanthanide elements between in a glow discharge spectrometry and in an ICP spectrometry"Bunseki Kagaku (in Japanese). 48. 349-363 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] K. Wagatsuma: "Criterion for determining the analytical emission lines in glow discharge optical emission spectrometry"Bunseki Kagaku (in Japanese). 48. 457-461 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] K. Wagatsuma: "Analytical performance of high-voltage neon plasma in glow discharge optical emission spectrometry"Fresenius J. Analytical Chemistry. 364. 780-782 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] Y. Danzaki, K. Takada, K. Wagatsuma, and M. Oku: "Mutual interference coefficients obtained for 639 emission lines of 68 elements in routine analysis by ICP-AES"Fresenius J. Analytical Chemistry. 364. 549-550 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] K. Wagatsuma and Y. Danzaki: "Non-Boltzmann distribution among energy levels of singly-ionized vanadium in dc glow discharge and rf inductively coupled discharge plasmas"J. Analytical Atomic Spectrometry. 14. 1727-1730 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1999 Final Research Report Summary
  • [Publications] K.Kubota: "Application of plasma gas flow modulation technique for accurate estimation of the emission intensities in ICP-AES"Analytical Sciences. 16. in press (2000)

    • Related Report
      1999 Annual Research Report
  • [Publications] H.Matsuta: "Characteristics of a 40.68-MHz radio frequency boosted low power glow discharge lamp"Spectrochimica Acta Part B. 54B. 1783-1792 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] K.Wagatsuma: "Control of d.c. bias current in radio-frequency glow discharge source and its emission characteristics"Spectrochimica Acta Part B. 54B. 527-535 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] K.Wagatsuma: "Analytical performance of a radio-frequency-powered glow discharge excitation source associated with bias voltage modulation"Fresenius J. Analytical Chemistry. 363. 333-338 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] K.Wagatsuma: "Application of a bias current modulation technique to radio-frequency glow discharge optical emission spectrometry"Analytical Sciences. 15. 517-523 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] K.Wagatsuma: "Depth profiling of thin surface layers using the amplitude modulation method in radiofrequency-powered glow discharge optical emission spectrometry"Surface and Interface Analysis. 27. 63-67 (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] K.Wagatsuma: "Glow Discharge Optical Emission Spectrometry"John Wiley & Sons, Ltd.(分担執筆). 21(854) (1999)

    • Related Report
      1999 Annual Research Report
  • [Publications] K.Wagatsuma: "Comparative study on emission characteristics of dc and rf-powered Grimm glow discharge plasmas Use of argon spectral lines" Fresenius J.Analytical Chemistry. 358. 581-584 (1997)

    • Related Report
      1998 Annual Research Report
  • [Publications] 我妻和明: "グロー放電発光分光法におけるアルカリ金属元素の分光特性とその定量下限" 分析化学. 46. 725-731 (1997)

    • Related Report
      1998 Annual Research Report
  • [Publications] K.Wagatsuma: "Selection of self-absorption free analytical lines of aluminium in glow diseharge optical emission spectrometery" Analytica Chimica Acta. 343. 267-272 (1997)

    • Related Report
      1998 Annual Research Report
  • [Publications] K.Wagatsuma: "Control of d.c.bias current in radio^frequency glow discharge source and its emission charcteristics" Spectrochimica Acta Part B. in press (1999)

    • Related Report
      1998 Annual Research Report
  • [Publications] K.Wagatsuma: "Depth profiling of thin surface layers using the amplitude modulation method in radiofrequency-powered glow discharge optical emission spectrometry" Surface and Interface Analysis. 27. 63-69 (1999)

    • Related Report
      1998 Annual Research Report
  • [Publications] 我妻和明: "自己バイアス電流導入法による高周波グロー放電発光分析における検出限界の改善" 鉄と銅. 85. 34-38 (1999)

    • Related Report
      1998 Annual Research Report
  • [Publications] K.Wagatsuma: "Glow Discharge Optical Emission Spectrometry(分担執筆)" John Wiley&Sons,Ltd., 16 (1997)

    • Related Report
      1998 Annual Research Report
  • [Publications] K.Wagatsuma: "Comparative study on emission characteristics of dc and rf-powered Grimm glow discharge plasmas. Use of argon spectral lines" Fresenius Jounal Analytical Chemistry. 358. 581-584 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] 我妻 和明: "グロー放電発光分光法におけるアルカリ金属元素の分光特性とその定量下限" 分析化学. 46No.9. 725-731 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] K.Wagatsuma: "Selection of self-absorption free analytical lines of aluminum in glow discharge optical emission spectrometry" Analytica Chimica Acta. 343. 267-273 (1997)

    • Related Report
      1997 Annual Research Report
  • [Publications] K.Wagatsuma: "Glow Discharge Optical Emission Spectrometry(分担執筆)" John Wiley & Sons,Ltd., 854 (1997)

    • Related Report
      1997 Annual Research Report

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Published: 1997-04-01   Modified: 2016-04-21  

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