Development and Features of Hydro-membrane Gas Chromatography
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- TANIKAWA Isao
- Corporate Research & Development Toyo Seikan Group
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- HIRAKAWA Nobuo
- Corporate Research & Development Toyo Seikan Group
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- HOSONO Hiroko
- Corporate Research & Development Toyo Seikan Group
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- NAKAMURA Hiroshi
- Department of Analytical Chemistry, Faculty of Pharmaceutical Sciences, Tokyo University of Science
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Hydro-membrane gas chromatography (HMGC) is achieved by the annular condensation of water in a capillary column at less than 70°C. The annular membrane of water is formed as a result of the wettability of the stationary phase, which is induced at a water contact angle ranging from 75° to 79°, as derived from a solubility parameter (δ) range of 15.7 ± 0.3 MPa1/2 of the coated resin. The range of the liquid to gas volume ratio (β) required to support the annular membrane should be kept between 0.00005 and 0.0003. In the case of a 0.25-mm i.d. column, the ratio can be set by the combination of a 0.1 to 0.2 µl min-1 water supply rate and helium gas flow rate. Separation by HMGC develops not only a gas-solid partition but also a focusing effect on the water membrane. One feature of HMGC is that it gives a non-adsorption chromatogram based on the blocking effect of pre-adsorbed water; furthermore, despite the presence of a relatively large quantity of water, the electron impact ionization efficiency is kept the same as in the usual GC/MS condition. The detection limit with the injection of 1 µl of aquatic solution was estimated to be less than 0.1 ppb of low-molecular-weight fatty acids with s/n = 5 on a mass chromatogram at m/z 45. The HMGC/EI-MS system can be applied to the trace analysis of C1 to C3 volatile acids, volatile inorganic acids, and halogenated organic acids in water.
収録刊行物
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- Analytical Sciences
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Analytical Sciences 23 (11), 1267-1274, 2007
社団法人 日本分析化学会
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詳細情報 詳細情報について
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- CRID
- 1390001204256851584
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- NII論文ID
- 130004441397
- 10019793676
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- NII書誌ID
- AA10500785
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- ISSN
- 13482246
- 09106340
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- NDL書誌ID
- 8982270
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- 本文言語コード
- en
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- データソース種別
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- JaLC
- NDL
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