Abstract
A procedure for the identification (104 substances) and determination (40 substances) of the active components of combined pesticides from different classes in water, vegetables, fruits, and meat by gas chromatography with mass-spectrometric and electron-capture detectors was proposed. The pesticides were extracted from the samples of vegetables, fruits, and meat with acetonitrile using the QuEChERS method. The extracts were preconcentrated by a factor of 50–60 and additionally purified by dispersive liquid-liquid microextraction. The pesticides were extracted from water by dispersive liquid-liquid microextraction with hexane (degree of concentration was higher than 100). The limits of detection by the time-of-flight detector equaled 0.01–0.02 mg/kg for solid samples and 1–2 μg/L for aqueous solutions. The limits of quantitation for pesticides were 1–2 mg/kg for solid samples and 0.05–0.1 μg/L for solutions. The analysis time was 1–2 h, and the RSD of the results did not exceed 18%.
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Original Russian Text © V.G. Amelin, D.K. Lavrukhin, A.V. Tret’yakov, 2013, published in Zhurnal Analiticheskoi Khimii, 2013, Vol. 68, No. 10, pp. 1007–1019.
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Amelin, V.G., Lavrukhin, D.K. & Tret’yakov, A.V. Combination of the quick, easy, cheap, effective, rugged, and safe (QuEChERS) method and dispersive liquid-liquid microextraction in the identification and determination of pesticides from various classes in food products by gas-liquid chromatography. J Anal Chem 68, 912–923 (2013). https://doi.org/10.1134/S1061934813080029
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DOI: https://doi.org/10.1134/S1061934813080029


