PMID: 11929274Apr 4, 2002Paper

Microwave-assisted extraction (MAE)-acid hydrolysis of dithiocarbamates for trace analysis in tobacco and peaches

Journal of Agricultural and Food Chemistry
Zisis VryzasEuphemia Papadopoulou-Mourkidou

Abstract

A simple and rapid method is presented for the analysis of residues of ethylenebis(dithiocarbamate) (maneb, zineb, and mancozeb) and N,N-dimethyldithiocarbamate (thiram and ziram) fungicides in dry tobacco leaves and peaches. Residues are extracted and hydrolyzed to CS(2) in a single step by use of microwave energy in a closed-vessel system while the evolved CS(2) trapped in a layer of iso-octane overlaying the reaction mixture is taken for gas chromatographic-flame photometric analysis. This combined extraction-hydrolysis step is carried out in 10 and 15 min for sets of 12 samples of tobacco and peach matrices, respectively. Total sample preparation time for GC analysis is 40 min. The limits of detection (LOD) are 0.005 mg/kg for thiram and ziram on peaches and 0.1 mg/kg for maneb, zineb, and mancozeb on tobacco. The respective LOD and limit of quantification (LOQ) levels in CS(2) equivalents are 0.003 and 0.006 mg/kg on peaches and 0.04 and 0.2 mg/kg on tobacco, respectively. Recoveries in the 0.01-60 mg/kg fortification range are 80-100% with respective relative standard deviations <20%. The method was used for the analysis of >3000 commercial tobacco samples including also different marketed cigarette brands.

Citations

Jun 13, 2013·Spectrochimica Acta. Part A, Molecular and Biomolecular Spectroscopy·Saadat RastegarzadehArash Larki
Feb 24, 2011·Journal of Agricultural and Food Chemistry·Silvina NiellHoracio Heinzen
Mar 28, 2007·Analytica Chimica Acta·O H J Szolar
Aug 30, 2008·Analytica Chimica Acta·J L López Paz, M Catalá-Icardo
Oct 23, 2010·Journal of Environmental Science and Health. Part. B, Pesticides, Food Contaminants, and Agricultural Wastes·Seyed N Azizi, Neda Asemi
Jun 12, 2013·Analytical Sciences : the International Journal of the Japan Society for Analytical Chemistry·Yan GaoDaqian Song
Mar 20, 2021·Microbial Pathogenesis·Zhendong HuangYunpeng Gai
Jul 24, 2008·Journal of Agricultural and Food Chemistry·O M S FilipeE B H Santos

❮ Previous
Next ❯

Related Concepts

Related Feeds

Antifungals

An antifungal, also known as an antimycotic medication, is a pharmaceutical fungicide or fungistatic used to treat and prevent mycosis such as athlete's foot, ringworm, candidiasis, cryptococcal meningitis, and others. Discover the latest research on antifungals here.