What question did this study set out to answer?

To develop a flow channel switching system using silicon microvalves for improved separation in capillary gas chromatography.

April 17, 2026BUNSEKI KAGAKU0 citationsOpen Access

A Novel Flow Channel Switching System for Capillary Gas Chromatography Using Silicon Microvalves

SSShigeaki ShibamotoShimadzu (Japan)ASAyaka SatoJapanese Red Cross Society, Japan WLWenjian LUShimadzu (Japan)

Key Points

To develop a flow channel switching system using silicon microvalves for improved separation in capillary gas chromatography.
Designed silicon microvalves using semiconductor manufacturing techniques.
Integrated microvalves into a diffusion-bonded metallic flow plate for a switching module.
Tested module for performance with capillary columns.
Demonstrated low dead volume suitable for capillary column analysis.
Achieved over 2 million open/close cycles with high durability.
Showed effective control over retention times of target compounds.

Abstract

単独のカラムで分離できない目的成分を複数のカラムへ流路切換えにより導入し，分離を行うマルチカラムgcはgcの歴史の中で比較的初期から使用されてきた．その多くはステンレス管のパックドカラムと2ポジションマルチポート切換えバルブをステンレス配管で接続することで流路を構成している．マルチポート切換えバルブはシール部の耐久性が低く，接続部のデッドボリュームが大きいためキャピラリカラムの使用には適さない．今回半導体製造用の微細加工技術を用いて単結晶シリコン製マイクロバルブを作成し，拡散接合で作成した金属製の流路板に実装して流路切換えモジュールを作成した．シリコンマイクロバルブを用いた流路切換えモジュールは低デッドボリュームでキャピラリカラム分析に適し，200万回以上開閉動作可能な高い耐久性を持ち，移動相ごと目的化合物をカラムに封止して保持時間を制御可能であった．マイクロバルブは非常に高いシール性を持ち，gc/Msの真空系にも適用可能であった．

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Shibamoto et al. (2026) studied this question.

synapsesocial.com/papers/69e1cdc45cdc762e9d857130 https://doi.org/10.2116/bunsekikagaku.75.109

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April 17, 2026BUNSEKI KAGAKU0 citationsOpen Access

A Novel Flow Channel Switching System for Capillary Gas Chromatography Using Silicon Microvalves

SSShigeaki ShibamotoShimadzu (Japan)ASAyaka SatoJapanese Red Cross Society, Japan WLWenjian LUShimadzu (Japan)

Key Points

To develop a flow channel switching system using silicon microvalves for improved separation in capillary gas chromatography.
Designed silicon microvalves using semiconductor manufacturing techniques.
Integrated microvalves into a diffusion-bonded metallic flow plate for a switching module.
Tested module for performance with capillary columns.
Demonstrated low dead volume suitable for capillary column analysis.
Achieved over 2 million open/close cycles with high durability.
Showed effective control over retention times of target compounds.

Abstract

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Cite This Study

Shibamoto et al. (2026) studied this question.

synapsesocial.com/papers/69e1cdc45cdc762e9d857130 https://doi.org/10.2116/bunsekikagaku.75.109

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