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Retention Time Changes
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| By
Justin Chow
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John W. Dolan
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What happens when the same method gives different retention times on different instruments?
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New Gas Chromatography Products 2012
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| By
John V. Hinshaw
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In this instalment John V. Hinshaw reviews gas chromatography instruments and accessories that were newly presented at Pittcon 2012 or were introduced to the marketplace in the preceding year.
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Hollow-Fibre Liquid-Phase Microextraction in the Three-Phase Mode — Practical Considerations
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| By
Astrid Gjelstad
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Hamidreza Taherkhani
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Knut Einar Rasmussen
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Stig Pederson-Bjergaard
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Ronald E. Majors
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This month's "Sample Prepartion Perspectives" describes practical aspects of hollow-fibre liquid-phase microextraction in the three phase mode (HF3LPME) and also electromembrane extraction (EME), which uses an electrical potential as the driving force for the extraction.
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Introduction to SPME for In Vivo Analysis
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| By
Heather Lord
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Janusz Pawliszyn
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The use of in vivo SPME offers important advantages over conventional methods according to the authors, including simplified sample clean-up, fast stabilization of unstable analytes, elimination of enzymatic degradation after extraction and reduced ion suppression for mass spectrometry analyses.
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