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Iselin, NJ, United States
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Majors R.E.,LCGC
LC-GC North America | Year: 2015

During the course of my scientific career beginning in the 1960s, I grew up with the birth of modern liquid chromatography (LC) column technology, refinements of the instrumentation, and the development of widespread application of this most powerful separation and analysis technique. Here, I would like to share some of my observations and experiences from the beginning, the growth period, and the maturation of high performance liquid chromatography (HPLC) columns, where I have focused nearly 33 years of writing for this magazine. I explore some of the early column breakthroughs beginning with the development of large superficially porous particles (SPPs), the porous irregular and spherical microparticulate particles, inorganic and organic polymeric monoliths, and the rebirth of the current generation of SPPs. © 2017 UBM. All rights reserved.


Dolan J.W.,LCGC
LC-GC North America | Year: 2015

How to get started in the process of identifying the problem source for column-related problems. © 2017 UBM. All rights reserved.


Hinshaw J.V.,LCGC
LC-GC North America | Year: 2014

This month's “GC Connections” examines the various ways — and their attendant benefits and drawbacks — with which chromatographers and chromatography data-handling systems locate and measure peaks. © 2017 UBM. All rights reserved.


Hurst W.J.,Hershey Company | Pfeifer K.,Hershey Company | Majors R.E.,LCGC
LC-GC Europe | Year: 2014

Although it has been happening to some degree for centuries, food adulteration is increasingly becoming a worldwide epidemic, as evidenced by the melamine scandal of 2008 and recent meat and fish substitutions at major food chains. Analysts are applying more sophisticated chromatographic, spectroscopic, and enzymatic analytical techniques to monitor and measure food adulterants, which are often economically motivated. In this instalment, guest authors Jeff Hurst and Kendra Pfeifer from Hershey Foods explore high performance liquid chromatography (HPLC), ultrahigh-pressure liquid chromatography (UHPLC), and mass spectrometry (MS) approaches being adopted to keep ahead of the food adulteration game. © 2014, Advanstar Communications Inc. All Rights reserved.


Majors R.E.,LCGC
LCGC North America | Year: 2014

To achieve lower detection limits and better selectivity, researchers are always exploring new ways to enhance sample preparation and separation technology. The addition of electrical potential to existing technologies or for entirely new approaches is relatively unexplored but can create another dimension of selectivity in sample preparation. In addition, speed and sensitivity are added benefits. This installment looks at the use of electroenhancement to solid-phase extraction, solid-phase microextraction, and membrane and liquid extraction. © 2014 Advanstar Communications, Inc. All rights reserved.


Majors R.E.,LCGC
LCGC North America | Year: 2013

New sorbent materials for solid-phase extraction (SPE), dispersive solid-phase extraction (dSPE), solid-phase microextraction (SPME), and other solid-liquid extraction methods continue to be developed both in academia and in the commercial sector. Here, we cover some areas of significant development, including molecularly imprinted polymers (MIPs), dSPE for QuEChERS, nanomaterials, and mixed-mode and silicone monolith sorbents. © 2014 Advanstar Communications, Inc. All rights reserved.


Bush L.,LCGC
LCGC North America | Year: 2013

From making major advances in column technology to educating several generations of chromatographers, Ron Majors has played an invaluable role in the field of separation science.

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