“Sample Prep Perspectives” keeps you up to date on new developments in sample preparation and provides practical tips to improve the effectiveness and ease of your sample preparation processes. Columnist Douglas E. Raynie is a department head and associate research professor at South Dakota State University. His research interests include green chemistry, alternative solvents, sample preparation, high resolution chromatography, and bioprocessing in supercritical fluids.

Column: Sample Prep Perspectives

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Articles

In electromembrane extraction (EME), the target analyte is extracted from an aqueous sample across a supported liquid membrane (SLM) and analyzed using LC. Through the study presented here, we demonstrate the principles of the technique and test its performance.

Electromembrane Extraction with Vials of Conducting Polymer

Our annual review of the new sample preparation instrumentation products introduced in the past year.

New Sample Preparation Products and Accessories

This selection of influential recent papers on chromatographic sample preparation gives us a sense of important developments.

Sample Preparation in the Rearview Mirror: Looking Back on 2019

A new technique, ICE concentration linked with extractive stirrer (ICECLES), provides highly efficient isolation of trace compounds from
aqueous samples. ICECLES combines freeze concentration with stir-bar sorptive extraction into a seamless analytical extraction methodology.

Sample Preparation Goes Subzero: Ice Concentration Linked with Extractive Stirrer (ICECLES)

Proper sample preparation is vital. We look at formal and informal training opportunities to educate chemists in the fundamentals of sample preparation skills.

The (Mis)education of an Analyst

To better understand modern sample preparation techniques-such as
ultrasound-assisted extraction, microwave-assisted extraction, and pressurized solvent extraction-we should look at the lessons these methods took from Soxhlet extraction.

Looking at the Past to Understand the Future: Soxhlet Extraction

Our annual report of sample preparation instrumentation, supplies, and accessories for gas and liquid chromatography

New Sample Preparation Products and Accessories (2020)

Bioanalysis with SPME has advanced greatly over the past decade.

Recent Advances in Solid-Phase Microextraction, Part II: Bio-SPME

Whether or not headspace sampling is quantitative depends on the information gleaned from the analysis

Is Headspace Sampling Quantitative?

We assess the state of the field, first looking back at developments presented at conferences this year, reader questions, and the passing of a pioneer in solid-phase extraction. Then, we look to the future of sample preparation.