Mary Ellen P. McNally

In recent years, analytical chemists have increasingly adopted a sustainability viewpoint. Yet, at the same time, they still use traditional organic solvents for extractions and other procedures. In this installment of Sample Preparation Perspectives, we will look at solvent selection from green considerations. Trends on solvent use are presented, followed by a discussion on what makes a green solvent. Finally, the CHEM21 Solvent Selection Guide is examined as representative of tools for selecting green solvents for use in analytical methods and other chemical processes.

This article reports on new products introduced at Pittcon this year and in the preceding year related to sample preparation instruments, supplies, and accessories.

This article describes the current highlights of using molecular imprinted polymers (MIPs) in sample preparation.

This yearly report on new products introduced in the preceding year, since March 2023, covers sample preparation instrumentation, supplies, and accessories.

A collaborative multi-analyte method developed utilizes HPLC and UHPLC to analyze more than 70 active ingredients. This method offers a validated approach for determining technical AI alongside linearity, precision, accuracy, and specificity tests for seven active ingredients.

A great deal has changed in the relationship between employers and the separation scientists who work for them. What does this change mean for both parties?

The Eastern Analytical Symposium has gone virtual for 2020, making it easy for everyone to attend. We highlight a few of the talks and innovative sessions that you won’t want to miss.

The 2020 Eastern Analytical Symposium has gone virtual for 2020, and although we will miss the camaraderie of face to face interaction, the theme of this year’s conference “Analytical Science: Cornerstone of Innovation” indicates the strength of the separation sciences and the talks that you will not want to miss.

A look at the role of chromatography in the fight against illegal food products entering the food chain.

The theme of the 2018 Eastern Analytical Symposium and Exposition is “Analytical Solutions to the World’s Problems.” The EAS has always been about problem solving. This year, we focus on problems that affect the world.

A memoir of Phyllis Brown-a pioneering chromatographer, a devoted mentor, and a champion for women in science

Introduction from the Guest Editor.

Internal standard methods are used to improve the precision and accuracy of results where volume errors are difficult to predict and control. A systematic approach has been used to compare internal and external standard methods in high performance liquid chromatography (HPLC). The precision was determined at several different injection volumes for HPLC and ultrahigh‑pressure liquid chromatography (UHPLC), with two analyte and internal standard combinations. Precision using three methods of adding the internal standard to the analyte before final dilution was examined. The internal standard method outperformed external standard methods in all instances.

When I was asked to edit a supplement for LCGC again, I was delighted. My background in physical chemistry has always made me captivated by separation theory; my career in industry has taught me to be practical in its use.

Internal standard methods are used to improve the precision and accuracy of results where volume errors are difficult to predict and control.

The parameters that should be considered in the optimization of HPLC methods are explained and then illustrated through the analysis of two commercial agricultural products.

When choosing the articles to include in this supplement, my selection was based on a very simple criterion.

The parameters that should be considered in the optimization of HPLC methods are explained and then illustrated through the analysis of two commercial agricultural products.

When choosing the articles to include in this supplement, my selection was based on a very simple criterion. My invitations went to the researchers that typically have something to say that I am interested in learning.

A panel of experts discuss the latest trends in sample preparaion.

Congratulations, LCGC, on 30 successful years of reporting on the current trends in chromatography. Certainly, this is an accomplishment that we in the separations community have enjoyed and benefited from, and we wish you many more happy years of success.