A closer study of methanol adsorption and its impact on solute retentions in supercritical fluid chromatography
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- 作者：Emelie Glennea ; Kristina Ö ; hlé ; nb ; Hanna Leekb ; Magnus Klarqvistb ; Jö ; rgen Samuelssona ; Torgny Fornstedta ; Torgny.Fornstedt@kau.se" class="auth_mail" title="E-mail the corresponding author
- 关键词：Supercritical fluid chromatography ; SFC ; Excess adsorption ; Solvent adsorption ; Tracer-pulse method ; Solute retention
- 刊名：Journal of Chromatography A
- 出版年：2016
- 出版时间：15 April 2016
- 年：2016
- 卷：1442
- 期：Complete
- 页码：129-139
- 全文大小：1174 K
文摘
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Surface excess isotherms of methanol were measured on a diol silica adsorbent in SFC.
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The tracer peak method was used with deuterium labeled methanol and mass spectrometry.
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A 4 Å monolayer of methanol was established at a certain modifier fraction.
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Solute retentions are strongly depending on methanol variations prior monolayer formed.
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Crucial use real values of flow and modifier content for mechanistic investigations.