January 2023 | LCGC Europe

Does High Polarity Mean High Retention on Stationary Phases in Gas Chromatography (GC)?

January 01, 2023

GC Connections

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This instalment examines the idea of stationary phase polarity in detail. The assumptions inherent in the most popular stationary phase polarity-evaluating systems—McReynolds constants and the polarity scale—are discussed.

Online Solid-Phase Extraction–Gas Chromatography–Flame Ionization Detection System for Monitoring Contaminants at Parts-Per-Trillion Concentrations in Process Waters

January 01, 2023

Peer Reviewed

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Online monitoring of odour and taste components that occur at parts-per-trillion (ppt) levels in industrial process waters requires specialized analytical hardware that is generally not compatible with the harsh environmental conditions in these typical industrial settings. An alternative instrumental method is proposed that uses dynamic extraction in combination with gas chromatography (GC) equipped with a simple flame ionization detector (FID) to achieve these extremely low detection limits. The extraction process was fully automated by means of online solid-phase extraction (SPE). The combination of online SPE and GC–FID was used to monitor the quality of process water contaminated with 2-methylisoborneol and geosmin, which are two notorious odour and taste components, in volumes up to 1 L.

Essentials of LC Troubleshooting, Part 5: What Happened to My Sensitivity?

January 01, 2023

LC Troubleshooting

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Some liquid chromatography (LC) troubleshooting topics never get old because there are some problems that persist in the practice of LC, even as instrument technology improves over time. There are many ways for things to go wrong in an LC system that ultimately manifests as detection sensitivity that is lower than expected. Developing a short list of the likely causes of these results can help streamline our troubleshooting experience when sensitivity-related problems occur.

HPLC 2023

January 01, 2023

Events

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The 51st International Symposium on High Performance Liquid Phase Separations and Related Techniques (HPLC 2023) will be held at the Congress Center Düsseldorf (CCD) in Germany, from 18–22 June 2023.