Simultaneous determination of cyanogen chloride and cyanogen bromide in treated water at sub-μg/L levels by a new solid-phase microextraction–gas chromatographic–electron-capture detection method

2000 ◽  
Vol 897 (1-2) ◽  
pp. 307-315 ◽  
Author(s):  
Beatriz Cancho ◽  
Francesc Ventura ◽  
MªTeresa Galceran
Keyword(s):  
Simultaneous Determination ◽  
Electron Capture ◽  
Solid Phase Microextraction ◽  
Cyanogen Bromide ◽  
Detection Method ◽  
Solid Phase ◽  
Electron Capture Detection ◽  
Treated Water ◽  
Cyanogen Chloride

Direct Immersion-Solid Phase Microextraction for the Determination of Chlorinated Pesticide Residues in Tomatoes by Gas Chromatography with an Electron Capture Detector

2013 ◽  
Vol 96 (6) ◽  
pp. 1430-1434 ◽  
Author(s):  
Maurizio Boccacci Mariani ◽  
Vanessa Giannetti ◽  
Elena Testani ◽  
Valentina Ceccarelli
Keyword(s):  
Electron Capture ◽  
Solid Phase Microextraction ◽  
Solid Phase ◽  
Correlation Coefficients ◽  
Electron Capture Detection ◽  
Extraction Temperature ◽  
Chlorinated Pesticides ◽  
Salting Out ◽  
Direct Immersion

Abstract The use of pesticides in agriculture has grown dramatically over the last decades. Environmental exposure of humans to agrochemicals is common and results in both acute and chronic health effects. In this study, direct immersion-solid phase microextraction (SPME) was coupled with electron capture detection for trace determination of 19 chlorinated pesticides in tomato samples, using a 100 μm polydimethylsiloxane fiber. The experimental parameters extraction time, extraction temperature, stirring, and salting out were evaluated and optimized. The LODs ranged from 0.5 to 8 μg/kg, and the LOQs from 5 to 30 μg/kg. A linear response was confirmed by correlation coefficients ranging from 0.97 to 0.9985. The developed method was tested by analyzing real samples purchased within the network of Italian distribution. The samples were found to be free from detectable residues of the studied pesticides. SPME has been shown to be a fast extraction technique that has several advantages such as solvent-free extraction, simplicity, and compatibility with the chromatographic analytical system.

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