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In our August issue:
COLUMNS
LC TROUBLESHOOTING
How Much Retention Time Variation Is Normal?
Small changes in retention time of a liquid chromatography (LC) method are normal. But at what point is a problem suggested? Retention time shifts can be frustrating when you can’t figure out if a shift is something you caused or if there is another reason for it.

PERSPECTIVES IN MODERN HPLC
Seven Common Faux Pas in Modern HPLC
The seven faux pas discussed here are common practices in HPLC that may no longer make sense because of improved technologies or other changes in modern HPLC. Therefore, careful consideration should be given to alternative approaches.

COLUMN WATCH
Standardized Testing of Silica as a Base Material for Difficult Bonded-Phase Preparative Applications
In HPLC column development, the bonded-phase silica is often only investigated to determine the suitability of a packed column for a particular separation class and not much thought is given to optimization of the base silica to make the overall packing material more suitable for the assay. Here, the authors examine general-purpose standardized tests to determine the quality of bulk silica before and after bonding.

PEER-REVIEWED ARTICLE
Developments in Green Chromatography
Green analytical chemistry is a widely recognized concept that has led to the development of new analytical methods with reduced environmental impact and minimized analyst occupational exposure. This article presents the most recent progress in the development of greener sample preparation and chromatographic separation techniques.

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