Acta Chimica Slovaca (ACS) publishes papers on fundamental and applied aspects of chemistry, biochemistry, chemical technology, chemical engineering and process control, biotechnology and food technology. Welcome are also topics which include chemical aspects of materials, physical chemistry and chemical physics, analytical chemistry, macromolecular chemistry and biomedical engineering.

Fast GC, GC-MS and sample preparation methods for pesticide residue analysis in non-fatty baby food

Andrea Hercegová *, Eva Matisová

Institute of Analytical Chemistry, Faculty of Chemical and Food Technology, Slovak University of Technology, Radlinského 9, 812 37 Bratislava, Slovakia

E-mail: *

Abstract: Possibilities and limitations of a bench top mass spectrometric detector (MSD) in selective ion monitoring mode (SIM) and electron capture detector (ECD) in fast gas chromatography (GC) with narrow bore columns of samples with complex matrices at ultra trace levels of pesticide residues were studied and compared.. Various injection systems were searched (splitless, on-column, programmable temperature vaporiser).
Two narrow-bore capillary columns with the same stationary phase, phase ratio and separation power but different I.D. 0.15 mm and 0.10 mm were compared with regards to their advantages, practical limitations and applicability in fast GC under the conditions of separation/speed trade-off.
Fast GC-MS detection was applied to determination of selected pesticides in apples, the common raw material for baby food production in Slovakia, at the concentration level ≤10 μg kg−1 - maximum residual limit (MRL). Four sample preparation methods were compared for the ultratrace analysis of pesticide residues in baby food. The effectiveness of clean-up of the final extract was determined. Optimization of extraction and GC measurements as well as the simplifying of the whole process of sample preparation were carried out.

Keywords: baby food, fast GC, GC-MS, sample preparation

Full paper in Portable Document Format: acs_0010.pdf

Acta Chimica Slovaca, Vol. 1, No. 1, 2008, pp. 112—123