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Combination of Solid‐phase Extraction‐hollow Fiber for Ultra‐preconcentration of Some Triazole Pesticides Followed by Gas Chromatography‐flame Ionization Detection by Mir Ali Farajzadeh; Leila Khoshmaram; Mohammad Reza Afshar Mogaddam is a Chemistry article available to read on EtoBox.

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## Abstract In this study, an extraction and preconcentration technique using solid‐phase extraction (SPE) along with hollow fiber (HF) has been developed as an ultra‐preconcentration technique for some triazole pesticides in aqueous samples. Triazole pesticides were employed as model compounds to assess the method and were monitored by gas chromatography–flame ionization detection (GC‐FID). Initially, an aqueous solution of target analytes was passed through an RP‐8 SPE cartridge and then the adsorbed analytes were eluted with μL amounts of toluene. The collected elute was slowly introduced into an HF that had one end blocked. This allowed precipitation inside the lumen and pores of the HF. Finally, the obtained HF was mounted on a home‐made solid‐phase microextraction syringe and entered into the GC injection port for thermal desorption‐GC analysis. The effect of various experimental parameters including injection port temperature, desorption time, state of HF, washing solvent, elution solvent and its volume, sample volume, etc. were investigated for finding the optimum conditions. The calibration graphs were linear in the ranges of 2–1000 ng/mL (penconazole and hexaconazole), 5–

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Author

Mir Ali Farajzadeh; Leila Khoshmaram; Mohammad Reza Afshar Mogaddam

Publisher

John Wiley and Sons; Wiley (John Wiley & Sons); John Wiley & Sons Ltd.; Wiley (ISSN 1615-9306)

Published

2011

Language

EN

Field

Chemistry (Physical Sciences)