Analysis of six fungicides and one acaricide in still and fortified wines using solid-phase microextraction-gas chromatography/tandem mass spectrometry

Abstract

A B S T R A C TA multiresidue gas chromatographic method for the determination of six fungicides (captan, chlorthalonil, folpet, iprodione, procymidone and vinclozolin) and one acaricide (dicofol) in still and fortified wines was developed. Solid-phase microextraction (SPME) was chosen for the extraction of the compounds from the studied matrices and tandem mass spectrometry (MS/MS) detection was used. The extraction consists in a solvent free and automated procedure and the detection is highly sensitive and selective. Good linearity was obtained with correlation coefficients of regression (R 2 ) > 0.99 for all the compounds. Satisfactory results of repeatability and intermediate precision were obtained for most of the analytes (RSD 6 20%). Recoveries from spiked wine ranged from 80.1% to 112.0%. Limits of quantification (LOQs) were consider-ably below the proposed maximum residue limits (MRLs) for these compounds in grapes and below the sug-gested limits for wine (MRLs/10), with the exception of captan.

Recent achievements and applications of solid – phase microextraction in pesticide residues analysis in food

“…During the extraction step, the nature and the thickness of the fiber, the ionic strength and the pH of the aqueous sample, the stirring conditions and the temperature and time of the extraction must be optimized. During the desorption step, temperature of the GC injector and desorption time must be considered (Martins et al, 2012).…”

“…Efficient sample preparation requires minimal analyte loss; analyte recovered in a good yield; efficient removing of coexisting components; to avoid problems in chromatography systems; the procedure can be performed conveniently and quickly; and inexpensive. Furthermore, use of harmful chemicals and large amounts of solvent in the sample preparation step cause environmental pollution and health hazards for operators, and extra-operational costs for waste treatment (Kataoka et al, 2009;Martins et al, 2012).…”

Salting-out Assisted Liquid-Liquid Extraction for the Determination of Multiresidue Pesticides in Alcoholic Beverages by High Performance Liquid Chromatography

“…Nevertheless, their wide use in or on agricultural products might be resulted in the occurrence of residues of these chemicals and their metabolites in raw as well as processed food commodities, water and soil [1]. Alcoholic beverages which are usually prepared from various agricultural products and are considered as a part of human diet [2] could also be directly or indirectly contaminated by these pesticides and subsequently, could affect the health of consumers [3][4][5][6][7][8][9]. To monitor and control the health of consumers, legislative authorities and monitoring organizations of different countries, have set maximum residue limits (MRLs) of pesticide residues in various raw and processed foods, including alcoholic beverages [9][10][11][12].…”

Preparation and characterization of sodium dodecyl sulfate doped polypyrrole solid phase micro extraction fiber and its application to endocrine disruptor pesticide analysis

“…Several kinds of SPME fibers are commercially available including polydimethylsiloxane (PDMS) [5][6][7][8][9][10][11], carbowax-divinlybenzene (CW-DVB) [12,13], polydimethylsiloxane-divinlybenzene (PDMS-DVB) [14][15][16], polyacrylate (PA) [17][18][19], divinylbenzene-carboxen-polydimethylsiloxane (DVB-CAR-PDMS) [20][21][22]. In recent years, studies have been focused on fabricating low cost, simple, robust and long-life fiber for the target analyte [23].…”

“…Sensitive and selective methods are therefore required for their reliable detection. Most of SPME methods developed to date for pesticide analysis in wine matrix are usually used by direct immersion technique [45,46]. A few studies have been published for the determination of one or two pesticide residues in wine samples by HS-SPME [47,48].…”