“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

Columns

Articles

We assess the landscape of new sample preparation instrumentation, supplies, and accessories introduced over the past 12 months.

New Sample Prep Products and Accessories

Sorbent-based extractions using metal-organic frameworks (MOFs) have several advantages, notably selectivity. How do these extractions work, and where are they most useful? We look into the current state of the art.

Next-Generation Sorbent-Based Extractions with Metal-Organic Frameworks

Temperature is frequently employed to enhance analytical extractions, especially with solid samples or volatile analytes. Using temperature to enhance analytical extractions continues today with more recently developed techniques, which we explore.

Turning Up the Heat: The Effect of Temperature on Analytical Extractions

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