This event was originally broadcast on: June 25, 2013 at 8:00 am PDT / 11:00 am EDT / 16:00 BST / 17:00 CEDT

In recent years, the analysis of residual levels of pesticides has developed into a comprehensive science. Pesticide residues that contaminate foods such as herbal products and teas have become a worldwide problem with direct implications on human health and international trade. Routine screening methods to analyze hundreds of potential contaminants are therefore necessary. Multi-residue methods for herbal products and teas are faced with the additional challenge of being used on products with worldwide origin and complex matrices of dried materials.

This web seminar explains an application protocol for a highly sensitive, matrix selective multi-residue pesticide analysis of herbal products. The protocol uses accelerated solvent extraction and gel permeation chromatography (GPC) for sample preparation along with a triple quadrupole GC-MS/MS system for detection and quantification. A routine screening method of more than 200 pesticide compounds was applied to a wide variety of different sample types including black tea, sage leaves, fennel, thyme, and chamomile. This highly automated and easy-to-use, robust method allows for the analysis of the most challenging sample types, with minimal system downtime.


Laura Bush

Editorial Director
LCGC North America


David Steiniger

Senior Applications Scientist
Thermo Fisher Scientific

Aaron Kettle
Product Manager, ASE system
Thermo Fisher Scientific

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