May 15th 2024
The still relatively new technique has distinct advantages, but a few of those benefits make it incompatible with some of the currently accepted principles of green sample preparation.
Welcome to the Third and Final Day of LCGC's Coverage of Pittcon 2008
March 4th 2008It seems as though Pittcon 2008 has gone by in the blink of an eye as we reach this, our final day of coverage from New Orleans. And although the long lineup of press conferences may be winding down at this point, the roster of technical sessions continues onward and will even continue into the end of the week.
2008 Chromatography Forum of Delaware Valley Dal Nogare Award
March 3rd 2008The 2008 Chromatography Forum of Delaware Valley Dal Nogare Award was presented Monday morning to John G. Dorsey, the Katherine Blood Hoffman Professor of Chemistry at Florida State University, by Mike Koenigbauer, President of the Chromatography Forum of Delaware Valley.
Welcome to Day 2 of Pittcon 2008
March 3rd 2008Good Morning and welcome to Day 2 of LCGC's coverage of Pittcon 2008 from New Orleans, Louisiana. We have already seen many informative and innovative press conferences and technical sessions, as the rate of technical development in the field of analytical chemistry continues to advance at a staggering pace.
Liquid Chromatography at the Extreme: Ultra-pressure and High Temperature
March 2nd 2008Pittcon 2008 got off to a great start here in New Orleans. The liquid chromatography sessions at the Ernest N. Morial Center were interesting and informative, such as the session entitled "Liquid Chromatography at the Extreme: Ultra-pressure and High Temperature."
Preparing Samples for HPLC Using Membrane Filtration
January 30th 2008High performance liquid chromatography (HPLC) enhances throughput in countless processes, including environmental analysis, dissolution testing, separation of biomolecules, and total drug analysis. To take advantage of the benefits of HPLC technology, samples and solvents must be cleared of particulate contaminants. Doing so protects instrument components and minimizes maintenance costs. This article outlines HPLC technology, explains the importance of sample preparation, and reviews the factors that must be considered when preparing HPLC samples by membrane filtration. The data from experiments to test these factors show that the physicochemical characteristics of membrane filters can affect HPLC results.
Immunosorbents for Selective Sample Preparation of Complex Mixtures
January 1st 2008Selective sample preparation techniques are particularly attractive for the analysis of trace amounts of small molecules in complex matrices. In this month's instalment, columnist Ron Majors covers the field of immunoextraction, a technique that employs immobilized antibodies to selectively capture specific analytes using molecular recognition via antibody–antigen interactions. Recently, the introduction of commercial products for specific high-volume environmental and food safety applications should spur further applications of this technique.
Immunosorbents for Selective Sample Preparation of Complex Mixtures
December 1st 2007In this month?s installment, columnist Ron Majors covers the field of immunoextraction, a technique that employs immobilized antibodies to selectively capture specific analytes using molecular recognition via antibody?antigen interactions. Recently, the introduction of commercial products for specific high-volume environmental and food safety applications has spurred further applications of this technique.
QuEChERS — A New Technique for Multiresidue Analysis of Pesticides in Foods and Agricultural Samples
November 1st 2007This month's instalment of "Sample Prep Perspectives" describes a new extraction technique called QuEChERS (standing for quick, easy, cheap, effective and safe and is pronounced "catchers") for the sample preparation of pesticides in foods and agricultural samples. The technique uses simple glassware, a minimal amount of organic solvent and various salt/buffer additives to partition analytes into an organic phase for clean up by dispersive solid-phase extraction (d-SPE). The technique provides good recoveries, is reproducible and costs less than other sample preparation approaches. The technique is being adopted by many laboratories worldwide. It has the potential for applications outside of the pesticide in foods area.
Gilson Offers Customer Support in US
October 3rd 2007Gilson, Inc. (Middleton, Wisconsin), an industry leader in purification systems for high performance liquid chromatography (HPLC), solid phase extraction (SPE), and gel permetation chromatography (GPC) clean-up, now offers direct support and sales in the United States.
Thermo Fisher Launches Partner Program
October 3rd 2007Thermo Fisher Scientific Inc., a leader in the separation sciences and chromatography industries, announces the launch of its enhanced partner program. The program is designed to support the expansion of the companies' informatics activity via its partners around the globe, the world class program will utilize business partners to better meet customer needs in multiple industries. Thermo Scientific?s informatics offerings include laboratory information management systems, chromatography data systems, and spectroscopy software.
The Determination of Furan in Foods — Challenges and Solutions
October 1st 2007The determination of the carcinogenic food processing contaminant furan by headspace sampling of foods is challenging because it can easily escape from the sample during preparation. Furan can also be easily formed as a by-product when the sample is heated in the headspace apparatus. This article describes a number of approaches to overcome these difficulties and alternative methods to quantify furan in a variety of matrices.
Technology and Application Highlights of HPLC 2007
October 1st 2007HPLC 2007 was held in Ghent, Belgium in June. Last month, columnist Ron Majors summarized some the important column developments as well as other Symposium highlights. This month, he winds up coverage with additional highlights in the areas of technology and applications. Among the topics covered are stationary phase preparation and characterization, multi-dimensional and comprehensive LC, temperature studies, detectors and an application overview.
Pittcon Announces the 2008 Grant Award Program
September 28th 2007The Pittsburgh Conference on Analytical Chemistry and Applied Spectroscopy, an event that features the newest applications and technologies in the chromatography industry, have announced the 2008 Pittsburgh Conference Memorial National College Grants (PCMNCG) Program.
LCGC Columnist Ron Majors Wins Gold Medal
September 19th 2007Ronald E. Majors, LCGC North America columnist and Senior Chemist for the Columns and Supplies Division of Agilent Technologies, Inc., has been awarded the 2007 Martin Gold Medal by the Chromatographic Society in the United Kingdom for outstanding contributions to the chromatography field.
Waters and Lambda Cooperate in Clinical Research
September 17th 2007Waters Corporation (Milford, Massachusetts) and Lambda Therapeutic Research Ltd (Mumbai, India) recently announced a joint cooperative agreement that provides innovative analytical laboratory equipment designed to enhance research quality service and business solutions for Lambda and its clients.