Correlation study of enzyme-linked immunosorbent assay and high-performance liquid chromatography/tandem mass spectrometry for the determination of N-methylcarbamate insecticides in baby food
- 1 October 2003
- journal article
- Published by Elsevier BV in Analytica Chimica Acta
- Vol. 495 (1-2), 123-132
- https://doi.org/10.1016/j.aca.2003.08.022
Abstract
In this work, a correlation study of monoclonal antibody-based enzyme-linked immunosorbent assays (ELISAs) and a liquid chromatography–electrospray mass spectrometric (HPLC/ESI/MS/MS) method for the determination of N-methylcarbamate insecticides carbofuran, carbaryl and methiocarb in fruit baby food is presented. The comparison of performance characteristics of the two methods was carried out by simultaneous analysis of apple–strawberry baby food (GPC purified) extracts spiked with N-methylcarbamates at six different concentration levels. Results obtained by ELISA correlated well with those obtained by LC/MS/MS, both in terms of trueness and precision. Recoveries, i.e. the ratio of the determined concentration to the known spiked concentration, were in the 60–100% range for ELISA and in the 73–104% range by LC/MS/MS with the RSDs from seven replicate analyses 3.6–23.3 and 1.7–8.2%, respectively. The influence of sample pre-treatment on the analytical performance of immunoassay method was also assessed. Using ELISA recoveries close to 90% were obtained even in crude non-purified baby food extracts. The limits of detection (LODs) by ELISA were 0.3, 0.04 and 0.02 μg/kg−1 for carbofuran, carbaryl and methiocarb, respectively, whereas using LC/MS/MS 1 μg/kg was the detection limit for all three insecticides. The results clearly indicate that the developed ELISA is suitable for the fast, quantitative and reliable determination of carbaryl, carbofuran and methiocarb in baby food even for the analysis of crude non-purified extracts.Keywords
This publication has 22 references indexed in Scilit:
- Evaluation of analytical methods for determining pesticides in baby foods and adult duplicate-diet samplesAnalytica Chimica Acta, 2001
- Analysis of N-methylcarbamates insecticides and some of their main metabolites in urine with liquid chromatography using diode array detection and electrospray mass spectrometryAnalytica Chimica Acta, 2000
- Evaluation of analytical methods for determining pesticides in baby foodAnalytica Chimica Acta, 1999
- Direct application of an enzyme-linked immunosorbent assay method for carbaryl determination in fruits and vegetables. Comparison with a liquid chromatography–postcolumn reaction fluorescence detection methodAnalytica Chimica Acta, 1999
- A monoclonal immunoassay for carbofuran and its application to the analysis of fruit juicesAnalytica Chimica Acta, 1997
- Development of an Enzyme-Linked Immunosorbent Assay to Carbaryl. 2. Assay Optimization and Application to the Analysis of Water SamplesJournal of Agricultural and Food Chemistry, 1997
- Supercritical Fluid Extraction—Enzyme-Linked Immunosorbent Assay Applications for Determination of Pesticides in Soil and FoodPublished by American Chemical Society (ACS) ,1996
- Determination of carbofuran in water and soil by a rapid magnetic particle-based ELISAJournal of Agricultural and Food Chemistry, 1995
- Validation of two immunoassay methods for environmental monitoring of carbaryl and 1-naphthol in ground water samplesAnalytica Chimica Acta, 1995
- Detection of aldicarb sulfone and carbofuran in fortified meat and liver with commercial ELISA kits after rapid extractionJournal of Agricultural and Food Chemistry, 1993