LCGC Food Analysis Focus
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July 29, 2013
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Chromatography Corner

Monitoring Antibiotics and Other Veterinary Drug Residues in Food
The presence of antibiotics, steroids, and other veterinary drugs in human food is an issue of increasing concern. LCGC spoke to Ana María García Campaña of the University of Granada in Spain about the development of sample preparation and analytical techniques for monitoring veterinary drug residues in food. In addition to using LC-MS-MS — with UHPLC and HPLC with core-shell particles — García has also been developing miniaturized and automated methods using capillary electrophoresis, including in-line SPE-CE.
Thermo Scientific™ SureStop™ vials, designed as part of the Advanced Vial Closure System (AVCS), remove subjectivity around achieving the optimal seal compression when closing a vial. SureStop vials offer the sealing and performance characteristics of a crimp top vial with the versatility and convenience of a threaded vial. The positive feedback design of the vial finish prevents over tightening of the closure.Learn more
Featured Articles

Determination of Phytohormones in Plant Extracts Using In-matrix Ethyl Chloroformate Derivatization and DLLME–GC–MS
A fast and simple sample preparation method using in-matrix derivatization and dispersive liquid–liquid microextraction (DLLME) for the simultaneous determination of 11 phytohormones in plants by gas chromatography–mass spectrometry (GC–MS) was developed. In this derivatization–extraction procedure, phytohormones in aqueous samples were derivatized with ethyl chloroformate (ECF) and extracted by DLLME simultaneously using ethanol–pyridine (4:1, v:v), both as derivatization catalyst and DLLME dispersant. This proposed rapid and convenient method was also successfully applied for analyzing the phytohormones in rice seed callus and cucumber fruits, indicating other wide applications in other plant tissues.
Advances in Sample Preparation for Food Analysis
Foods are an extremely diverse group of products that are often supplemented with additional items such as preservatives, vitamins and antioxidants, and sometimes contaminated with harmful substances such as pesticides. Food analysis, promoted by industry, academia, and government institutions, pushes research towards more advanced, sensitive, and environmental-friendly methodologies. Sample preparation is a crucial part of the analysis of foodstuffs. Current sample preparation techniques used in food analysis are reviewed and the advantages and drawbacks of each one are discussed.
Need Help With LC Troubleshooting?
A free interactive LC Troubleshooter is now available at CHROMacademy, sponsored by Thermo Scientific. In 3 simple steps you will overcome your instrument, separation and quantitation issues. It's completely free.
Chromatography News

FDA Takes Step to Help Ensure the Safety of Imported Food
In an effort to implement the bipartisan Food Safety Modernization Act (FSMA) signed by President Obama, the U.S. Food and Drug Administration announced two proposed rules aimed at helping to ensure that imported food meets the same safety standards as food produced in the United States.
New Seed Oils Identified Using GC–FID
Fatty acids found in fish oils have been linked to health benefits, but declining fish stocks and possible presence of contaminants, such as PCBs, dioxins, and methylmercury, in fish oil have led to a search for new sources. A group of researchers from the University of Almeria (Almeria, Spain) has identified a new alternative source for fatty acids, according to results published in the Journal of Food Composition and Analysis.
Characterizing Phenolic Compounds in Fava Beans
Fava beans are a good source of polyphenols and are located in different parts of the plant. Phenolic compounds are thought to contribute to the overall antioxidant activities of plant foods. However, there is a lack of information on the phenolic composition of the seeds (beans) of some edible varieties. This has led a team of researchers based in Chile and Spain to use high performance liquid chromatography (HPLC) to identify the composition of a variety of immature fava seeds.
Featured Product

Mass Spectrometry Transformed
The Thermo Scientific™ TSQ Endura™ and TSQ Quantiva™ triple-stage quadrupole mass spectrometers provide unparalleled value, unrivaled sensitivity, speed, and dynamic range for scientists facing the most difficult quantitative challenges.Learn more
New Webcasts

IC Assay Methods for Impurities, Degradation Products, and Counterions in Drug Substances and Drug Products
Tuesday, August 13, 2013
8:00 am PDT/ 11:00 am EDT/ 16:00 BST/ 17:00 CEDT

Ion chromatography is increasingly being adopted in the pharmaceutical market for assays and impurity tests.  Learn how your lab can benefit from adopting ion chromatography to meet some of your pharmaceutical analysis needs.
Analysis of Post-translational Modifications Using LC–MS-MS
Thursday, August 22, 2013
8:00 am PDT/ 11:00 am EDT/16:00BST/17:00 CEDT

In this session, Dr Duncan Smith  and Dr John Griffiths (MS-Insight Ltd and Manchester University) explain the principles behind the analysis of a number of key post-translational modifications (PTMs) using LC-MS/MS techniques.
Upcoming Events

4–8 August 2013
Microscopy & Microanalysis 2013 Meeting
Indianapolis, IN
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5–8 August 2013
53rd Annual Pharmaceutical Analysis Conference - "Strategies for Analytical Excellence"
Madison, WI
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11–16 August 2013
XXII International Materials Research Congress (IMRC) 2013
Cancun, Mexico
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12–14 August 2013
CoSMoS 2013
San Diego, CA
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25–28 August 2013
AOAC 127th Annual Meeting &Exposition
Chicago, IL
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16–18 September 2013
Applied Pharmaceutical Analysis
Boston, MA
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20 September–4 October 2013
SciX 2013 - The Great SCIentific eXchange
Milwaukee, WI USA
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