Development of Direct Injection Multi-gas ICP and Its Application of Elemental Analysis
| Project/Area Number |
17350034
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| Research Category |
Grant-in-Aid for Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Analytical chemistry
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| Research Institution | Tokyo Institute of Technology |
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Principal Investigator |
OKINO Akitoshi Tokyo Institute of Technology, Interdisciplinary Graduate School of Science and Engineering, Associate Professor (60262276)
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| Co-Investigator(Kenkyū-buntansha) |
HOTTA Eiki Tokyo Institute of Technology, Interdisciplinary Graduate School of Science and Engineering, Professor (70114890)
KAWAMURA Tohru Tokyo Institute of Technology, Interdisciplinary Graduate School of Science and Engineering, Associate Professor (10370214)
WATANABE Masato Tokyo Institute of Technology, Interdisciplinary Graduate School of Science and Engineering, Assistant Professor (20251663)
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| Project Period (FY) |
2005 – 2007
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| Project Status |
Completed (Fiscal Year 2007)
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| Budget Amount *help |
¥15,580,000 (Direct Cost: ¥14,800,000、Indirect Cost: ¥780,000)
Fiscal Year 2007: ¥3,380,000 (Direct Cost: ¥2,600,000、Indirect Cost: ¥780,000)
Fiscal Year 2006: ¥4,200,000 (Direct Cost: ¥4,200,000)
Fiscal Year 2005: ¥8,000,000 (Direct Cost: ¥8,000,000)
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| Keywords | Inductively Coupled Plasma / Atmospheric Plasma / Multi-Gas Plasma / Helium / Argon / Atomic Emission Spectrometry / Mass Spectrometry / ICP / 空気 / 元素分析 |
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| Research Abstract |
Inductively coupled plasma mass spectrometry(ICP-MS) and ICP atomic emission spectrometry (ICP-AES) using argon ICP as an ionization or an excitation source have been widely utilized for trace elemental analysis. Unfortunately, it was difficult to excite high ionization potential elements because the ionization ability of argon plasma is not enough high. To overcome this problem, development of other powerful plasma sources, for example helium ICP, are expected.
In our research group, a new direct injection multi-gas ICP source for MS and AES has been developed. With the new ICP source, not only Ar but He, O_2, N_2, CO_2, N_2O, air and their mixture plasmas can be stably generated in atmospheric pressure. The torch consists of coaxial three quartz glass tube structure and the cooling gas, the plasma gas and the carrier gas flow between the tubes. To generate an adequate vortex flow at the plasma generating region even when helium gas is used, the torch has smaller gas inlet and short to
… More
rch configuration. Helium has about nine times higher kinematic viscosity than other gases so the vortex flow of helium easily turn into the laminar flow. It is apprehended that the cooling gas may immix into the plasma and it cause increasing of background emission for AES and background ion for MS. In this study, effect of the cooling gas kind and the flow rate on the emission properties in Ar and He ICP are investigated. The radial emission intensities of N_2, Ar and He are measured. As a result, it was found that when appropriate gas and flow rate are chosen, mixture of not only cooling gas but atmosphere into the plasma are reduced.
Furthermore, aqueous solutions can be directly introduced into the plasma like DIN (direct injection nebulize) or DIHEN (direct injection high-efficiency nebulizer) using conventional nebulizers. The new torch has a support gas flow around the nebulized solutions to reduce diffusion of the solutions into the plasma. As a result, the diffusion angle of the injected solutions effectively reduced. Then the emission intensities from the sample are increased and the experimental conditions for stable generation of plasmas with direct injection are expanded. The spectroscopic characteristics of the new direct injection multi-as ICP source are investigated. Less
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Report
(4 results)
Research Products
(54 results)
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[Presentation] Multi-gas high purity plasma source for reduce to atmospheric plasma processing2007
Author(s)
H., Miyahara, T., Kageyasu, K., Takimoto, E., Hotta, A., Okino
Organizer
The Sixth Asian-European International Conference on Plasma Surface Engineering
Place of Presentation
Nagasaki, Japan
Year and Date
2007-09-24
Description
「研究成果報告書概要(欧文)」より
Related Report
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[Presentation] Multi-gas microplasma source for trace elemental analysis2007
Author(s)
H., Miyahara, Y., Nagata, T., Meguro, E., Hotta, R., Shimada, A., Okino
Organizer
CSI XXXV
Place of Presentation
Xiamen, China
Year and Date
2007-09-23
Description
「研究成果報告書概要(欧文)」より
Related Report
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[Presentation] Fundamental Characteristics of Pulse Synchronized ICP System for Nano-, Pico Liter Analysis2007
Author(s)
A., Okino, H., Miyahara, Y., Nagata, T., Meguro, K., Kumagai, E., Hotta
Organizer
EURO Analysis XIV
Place of Presentation
Antwerp, Belgium
Year and Date
2007-09-10
Description
「研究成果報告書概要(欧文)」より
Related Report
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[Presentation] Spectroscopic Measurements of Pulse Operated Multi-Gas Inductively Coupled Plasma Source2007
Author(s)
A., Okino, H., Miyahara, T., Kageyasu, K., Takimoto, E., Hotta
Organizer
ESCAMPIG XVII
Place of Presentation
Lecce, Italy
Year and Date
2007-07-12
Description
「研究成果報告書概要(欧文)」より
Related Report
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[Presentation] Pulse Synchronized ICP System using Direct Droplet Injection Nebulizer for Nano-Liter Analysis2007
Author(s)
A., Okino, K., Takimoto, H., Miyahara, T., Kageyasu, E., Hotta
Organizer
European WC. on Plasma Spectrochemistry
Place of Presentation
Taormina, Italy
Year and Date
2007-02-18
Description
「研究成果報告書概要(欧文)」より
Related Report
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[Presentation] Droplet Direct Injection System for Inductively Coupled Plasma Source2006
Author(s)
K., Takimoto, T., Kageyasu, H., Miyahara, W., Kumagai, E., Hotta, A., Okino
Organizer
FACSS 2006
Place of Presentation
Orlando, USA
Year and Date
2006-09-24
Description
「研究成果報告書概要(欧文)」より
Related Report
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[Presentation] Low-Pressure Multi-Gas Inductively Coupled Plasma Source2006
Author(s)
T., Kageyasu, H., Miyahara, K., Takimoto, E., Hotta, A., Okino
Organizer
IEEJ Plasma and Pulsed-power Joint meeting, Aug.7, 2006
Place of Presentation
Kauai, Hawaii
Year and Date
2006-08-07
Description
「研究成果報告書概要(欧文)」より
Related Report
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[Presentation] Spectroscopic characteristics of pulse operated high power multi-gas ICP2006
Author(s)
H., Miyahara, T., Kageyasu, K., Takimoto, E., Hotta, R., Shimada, A., Okino
Organizer
Spring annual meeting of spectroscopy
Place of Presentation
Tokyo, Japan
Year and Date
2006-05-16
Description
「研究成果報告書概要(欧文)」より
Related Report
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