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Thermo Electron Introduces GC Applications

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Thermo Electron Corporation has announced the development of GC applications for the analysis of pesticide residues using the TRACE GC Ultra™.

These methods assist compliance with the strict legislation proposed by the U.S. Environmental Protection Agency (EPA) Code of Federal Regulations and the European Commission (EC) Directives which aim to minimize pesticide residue levels in food products.

The proposed legislation decrees Maximum Residue Levels (MRL) of 0.01 mg/kg or less, representing significant analytical challenges for environmental and toxicology laboratories, as well as government agencies that need an accurate method of detecting these minimal levels of pesticide residues.

According to Thermo Electron, in the first application, TRACE GC Ultra utilizes a patented large volume splitless (LV-SL) technique, which allows the operator to analyze residual pesticides in food with a 30x sensitivity increase over traditional methods. With this technique, detectability in trace analysis is considerably enhanced and determination of strictest MRL of 0.01 mg/kg possible.

Another application is the control of Organo-Phosphorous Pesticides (OPPs), for example in olive oil. OPPs are well known to cause irreversible effects on the nervous system; therefore, their possible presence as trace residues in food must be strictly monitored.

Thermo's TRACE GC Ultra is designed to facilitate a gas chromatographic technique using Programmable Temperature Vaporizing (PTV) injection and a Flame Photometric Detector (FPD). Combined with a backflush option, sensitive monitoring can now be increased by four orders of magnitude through the injection of a concentrated sample.