solid phase extraction of pesticide residues in water samples: ddt and its metabolites

Pesticide residues in food 2000 : DDT

Solid-phase extraction and cleanup of organophosphorus pesticide residues in bovine muscle with gas chromatographic detection.

The purpose of this investigation is to develop a rapid and simple method for the assessment of organophosphorus pesticides in bovine muscle by using solid-phase extraction (SPE). After extraction with ethyl acetate (EtOAc) the homogenate is centrifuged and filtered through sodium sulfate. The fat is precipitated in methanol by cooling and the extract is diluted with water and passed through a ...

Optimization of the Extraction in solid phase of Organophosphorus Pesticide Residues in Drinking Water, Using Graphitized Carbon Black Cartridges

The aim of this work was to optimize an analytical method to determine residues of 21 organophosphorus pesticides of different polarities in drinking water using graphitized carbon black extraction cartridges liquid-solid and gas chromatography. The extraction was performed passing 100 mL of sample at 5 mL/min through 250 mg black graphitized carbon previously conditioned. The elution was carri...

Headspace Solid Phase Microextraction in Pesticide Residues Analysis: 1. Optimisation of Extraction Conditions

The method of headspace solid phase microextraction (HS/SPME) was successfully used in a simultaneous multicomponent analysis of hexachlorobenzene (HCB), tefluthrin, heptachlor, aldrin, chlorpyrifos, fenthion and bifenthrin in aqueous medium. Measurements were performed using a nonpolar polydimethyl siloxane (PDMS) fiber. Detection and quantification were done by gas chromatography/mass spectro...

Determination of organochlorine pesticide residues in honey, applying solid phase extraction with RP-C18 material.

In this study, a new clean up method was developed for the routine multiresidue determination of organochlorine pesticide residues in honey. The analytical procedure requires sample extraction with methanol, followed by a clean up step through a C18 Sep-Pak cartridge. Finally, pesticides are eluted with hexane. The determination of organochlorine pesticide residues was performed by capillary ga...

Determination of organochlorine pesticide residues in foods using solid-phase extraction clean-up cartridges.

Fourteen organochlorine pesticide residues in fatty foods were determined using a simple and rapid procedure based on solid-phase extraction (SPE) clean-up cartridges with octadecyl (C18)-bonded porous silica, a tandem C18 and Florisil column, Alumina-N and Florisil. A Florisil cartridge eluted with 12 ml petroleum ether-ethyl ether (95 + 5) was the most efficient clean-up procedure capable of ...