A modification of the Luke multiresidue procedure for low moisture, nonfatty products

Luke, Milton A.; Doose, Gregory M.

doi:10.1007/bf01610107

Cited by 45 publications

(12 citation statements)

References 2 publications

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“…They found that their extraction efficiencies improved for more polar pesticides with the addition of water. It is thought that the addition of water to dried plant samples causes the deactivation of the cellulose active sites where these pesticides are sorbed, therefore increasing extraction efficiencies (Luke and Doose, 1983).…”

Section: Resultsmentioning

confidence: 99%

Method for the Simultaneous Extraction and Analysis of Two Current Use Pesticides, Atrazine and Lambda-Cyhalothrin, in Sediment and Aquatic Plants

Bennett

Moore

Cooper

et al. 2000

Bull. Environ. Contam. Toxicol.

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It has been estimated that 375,000 tons of pesticides are used for agriculture annually in the Midwest area of the United States, where approximately 65% of this total is used for production of corn and soybean crops (Clark et al., 1999). Within the Mississippi River Basin, greater than 100,000 tons of herbicides are used annually (Clark et al., 1999). Triazine herbicides (e.g. atrazine) and synthetic pyrethroids insecticides (e.g. λ−cyhalothrin) are two classes of pesticides currently used in this agricultural area. These two types of pesticides are very dissimilar, due to their differences in structural and physical properties. A major difference between these pesticides is polarity, where triazines are relatively more polar than pyrethroids.With demand for more rapid extractions and multiresidue pesticide analyses, analytical methods for environmental matrices, such as soil and plants, have been developed using new technologies (Kahn, 1995; Sánchez-Brunete et al., 1998). For example, traditional extraction methods, such as soxhlet and sonication, are being replaced with solid-phase extraction (SPE), solid-phase microextraction (SPME) and supercritical fluid extraction (SFE) techniques because they are less time consuming and require lower volumes of organic solvents (Hengel et al., 1997;Miege and Dugay, 1998;Camel, 1998). In some cases, newer analytical equipment is not available, therefore older methods using traditional equipment must be reevaluated.The following study presents the development of a rapid and sensitive gas chromatographic method using sonication for extraction of atrazine and λ− cyhalothrin in sediment and aquatic macrophytes. This method requires lower solvent volumes and reduced sample weights relative to the traditional EPA sonication method.In addition to method development, a storage stability test was performed to determine acceptable storage times for natural water samples containing pesticide residues. Natural water samples were fortified with atrazine, λ-cyhalothrin, and metolachlor, a chloroacetamide herbicide. These three pesticides represent three of the major classes of pesticides used extensively in row crop production in the area of the lower Mississippi River Basin known as the Mississippi Delta.

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Section: Resultsmentioning

confidence: 99%

Method for the Simultaneous Extraction and Analysis of Two Current Use Pesticides, Atrazine and Lambda-Cyhalothrin, in Sediment and Aquatic Plants

Bennett

Moore

Cooper

et al. 2000

Bull. Environ. Contam. Toxicol.

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“…n i (Cb) = 39.6%. Analyte extractability is also affected by the stronger bounding of incurred pesticide residues in dried matrices than for high water content matrices [22,23]. This phenomena is not solved by water addition but can be attenuated by the use of more efficient extraction solvent mixtures.…”

Section: Analytical Portion Hydrationmentioning

confidence: 98%

Multivariate analysis of nutritional information of foodstuff of plant origin for the selection of representative matrices for the analysis of pesticide residues

Silva

Camões

2010

Analytica Chimica Acta

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“…The filtrate was made up to 100 ml 65 % acetone solution; NaCl was added to 50 ml of the filtrate in a separating funnel and shaken with DCM (2x); the combined DCM layers were dried over anhydrous Na 2 SO 4 , and evaporated in vacuo. The residue was dissolved in 40% ACN and an aliquot (50 µl) was analysed by HPLC (Luke and Doose, 1983).…”

Section: Sample Preparation and Fortificationmentioning

confidence: 99%

Determination of pesticide residues in Khat leaves by solid-phase extraction and high-performance liquid chromatography

Awadh

Lemme

Jira

et al. 2005

Afr. J. Trad. Compl. Alt. Med.

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The purpose of this investigation is to develop a simple method for the assessment of pesticides in Khat leaves, Catha edulis FORSK. (Celastraceae) shrub, chewed by about 60 % of the Yemeni people, producing amphetamine-like psychostimulation. The first procedures involve solid-phase extraction using Adsorbex ® RP-C18 and Bakerbond ® RP-C18 disposable cartridges with 40 % acetonitrile for elution. Isocratic and gradient analysis was carried out by means of high-performance liquid chromatography using different stationary phases to analyse methidathion, peconazole and dimethoate. An Ultrasphere ® ODS RP-18-column with UV-detection at 210 nm and 80/20 % (v/v) acetonitrile/water as mobile phase (isocratic) was used to determine the content of methidathion, peconazole and dimethoate (detection limit 20-25 ng). The method was validated with fortified samples at pesticide concentration of 0.1 mg/ml. Average recoveries ranging from 97.9 and 101.6% with a relative standard deviation (RSD) of 1.7-3.8 %. Each recovery analysis was repeated four times. Limits of detection ranged from the analytical procedures were applied to 5 samples of khat and no detectable amounts of pesticides were found in any sample under the conditions described.

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A modification of the Luke multiresidue procedure for low moisture, nonfatty products

Cited by 45 publications

References 2 publications

Method for the Simultaneous Extraction and Analysis of Two Current Use Pesticides, Atrazine and Lambda-Cyhalothrin, in Sediment and Aquatic Plants

Method for the Simultaneous Extraction and Analysis of Two Current Use Pesticides, Atrazine and Lambda-Cyhalothrin, in Sediment and Aquatic Plants

Multivariate analysis of nutritional information of foodstuff of plant origin for the selection of representative matrices for the analysis of pesticide residues

Determination of pesticide residues in Khat leaves by solid-phase extraction and high-performance liquid chromatography

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