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In our November issue:
COLUMNS
LC TROUBLESHOOTING
Reducing Mobile-Phase Consumption
Solvent costs too high? Here are some ideas on how to decrease the amount of mobile phase you use.

GC CONNECTIONS
Split-Vent Traps
In GC split injection systems as much as 99% or more of the injected sample never enters the column: It is released downstream of the inlet where it can encounter and possibly perturb precision gas control devices. The split-vent trap acts to prevent or at least moderate such effects. This month’s instalment addresses the operation and maintenance of split-vent traps.

COLUMN WATCH
Retention of Stationary Phases in HILIC
The retention and selectivity of stationary phases in HILIC is discussed.

PEER-REVIEWED ARTICLE
Improving Pharmaceutical Analysis
The authors present a method for comparing the levels of baseline interference arising from common laboratory mobile phase contamination sources and assess different approaches for removing dissolved contaminants to generate interference free chromatogram baselines. This article demonstrates that recirculating mobile phase through a semi-preparative scale column using a reagent delivery pump to be more effective than previously published mobile phase decontamination methods.

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