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Articles by Ronald E. Majors

Ronald E. Majors

"Column Watch" and "Sample Prep Perspectives" Editor

Ron Majors, editor of "Column Watch" and "Sample Prep Perspectives," has been with LCGC North America for over 20 years. Currently a business development manager with Agilent Technologies, Wilmington, Delaware, Ron is known industry-wide as one of the premier chromatography experts in the field. He is also a member of LCGC's editorial advisory board.

Articles
The Continuing Acetonitrile Shortage: How to Combat it or Live with It
June 1, 2009

Ron Majors provides an unbiased look at this present crisis and gives alternative solutions.

Stir Bar Sorptive Extraction (SBSE) and Headspace Sorptive Extraction (HSSE): An Overview
May 1, 2009

The guest columnists review SBSE and HSSE and examine their advantages and limitations, along with providing approaches to overcoming the latter.

New Chromatography Columns and Accessories at Pittcon 2009: Part II
April 1, 2009

Ron Majors brings readers the second part of his yearly review of all that was new and innovative at the annual Pittsburgh Conference.

New Chromatography Columns and Accessories at Pittcon 2009: Part I
March 1, 2009

Ron Majors brings readers his yearly review of all that was new and innovative at the annual Pittsburgh Conference.

Practical Aspects of Solvent Extraction
February 1, 2009

Columnist Ron Majors discusses some of the practical considerations in the successful application of the popular yet age-old technique of solvent extraction (also known as liquid–liquid extraction, or LLE). After a brief review of the basics, guidelines on the selection of the appropriate extraction solvents and how to use acid–base equilibria to ensure efficient extractions of ionic and ionizable compounds are provided. Problems in LLE and the solutions to these problems are highlighted. A newer technique called dispersive liquid–liquid microextraction is introduced.

Extraction and Preconcentration of Residues and Contaminants in Food Samples Using Membrane Techniques
February 1, 2009

Guest authors from South Africa review the application of membranes in the extraction, preconcentration, and separation of various contaminants in food.

Improving Protein Separations with Mixed-Mode Chromatography
January 1, 2009

Guest authors show how mixed modes can be used successfully in the optimization of protein purification, and discuss how various experimental parameters can be used to regulate the binding of proteins to mixed-mode sorbents.

Practical Aspects of Solvent Extraction
December 1, 2008

Columnist Ron Majors discusses some of the practical considerations in the successful application of the popular yet age-old technique of solvent extraction (also known as liquid–liquid extraction, or LLE).

The Role of Polymers in Solid-Phase Extraction and Sample Preparation
November 1, 2008

This installment of SPP will compare and contrast the various types of polymeric and non-polymeric sorbents. The major advantages or polymeric sorbents will be discussed, and some applications will illustrate the versatility of polymeric SPE.

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