pesticide sampling Articles
-
AutoMate-Q40 Automated QuEChERS Extraction for Pesticide Residues in Botanicals
Abstract QuEChERS is a Quick-Easy-CheapEffective-Rugged-Safe extraction method that has been developed for the determination of pesticide residues in agricultural commodities. Since its development, QuEChERS has been applied to many different classes of commodities ranging from fruits and vegetables to dry grains and teas. In 2007, the United States Food and Drug Administration (USFDA) announced ...
-
Field Sampling for Pesticides, Using Solid Phase Microextraction/Capillary GC
An SPME portable field sampler can be used to extract analytes from samples in the field, then store them for up to 3 days, or longer, before performing the analysis. A field sampler with a 100µm polydimethylsiloxane-coated fiber extracts chlorinate, organophosphorus, triazine, and other pestricides from water. After 24 hours of storage, analyte loss from storage containers was far greater ...
-
Particle-facilitated pesticide leaching from differently structured soil monoliths
Received for publication September 19, 2008. The leaching of soil particles and surface applied 14C-labeled glyphosate and pendimethalin from intact soil columns (height: 50 cm; diameter: 30 cm) were investigated, and the relative significance of particle-facilitated pesticide transport was quantified. Investigations were performed with a recently plowed (four columns) and an untilled (five ...
-
Pesticide runoff from greenhouse production
A research has been undertaken studying pesticide residues in water from greenhouses and the use of soils and filter materials to reduce such losses. The pesticides detected in water samples collected downstream greenhouses include 9 fungicides, 5 herbicides and 4 insecticides. 10 compounds from flower and vegetable productions were frequently found to exceed environmental risk levels, and with a ...
-
Capillary GC Analyses of Triazine Pesticides in Dry Pet Food
Based on federal and state regulations for identifying and quantifying low levels of pesticides in food and environmental samples, we selected three capillary columns to screen for triazine pesticides. A nonpolar and two low/intermediate polar phases were chosen to evaluate differences in component elution order and retention times. Low level screening analyses were performed effectively by using ...
-
Pesticide residue evaluation in major staple food items of Ethiopia using the QuECHERS method: A case study from the Jimma zone
Samples of maize, teff, red pepper and coffee (green bean and coffee bean with pulp) were collected from a local market in Jimma zone, Ethiopia. Samples were analyzed for the occurrence of cypermethrin, permethrin, deltamethrin, chlorpyrifos ethyl, DTT and its metabolites, and endosulfan (α, β). In the analytical procedure, the QuEChERS (Quick, Easy, Cheap, Effective, Rugged and Safe) ...
-
Pesticide and Pathogen Contamination of Vegetables in Ghana’s Urban Markets
Abstract The objective of the study was to determine and compare the current level of exposure of the Ghanaian urban population to hazardous pesticide and fecal coliform contamination through the consumption of fresh vegetables produced in intensive urban and periurban smallholder agriculture with informal wastewater irrigation. A total of 180 vegetable samples (lettuce, cabbage, and spring ...
-
Comparing pesticide residues in Amish and commercially grown strawberries and spinach using QuEChERS, Various dSPE Sorbents, and GC-TOFMS
Abstract QuEChERS extraction, dSPE cleanup, and GC-TOFMS analysis were used to assess pesticide levels in strawberries and spinach from both commercial and Amish growers. Various dSPE cleanup products were compared to determine which were most effective. Good recoveries were obtained for most pesticides; however, low recoveries were observed for some base-sensitive or planar compounds. Incurred ...
-
Pesticides in the European Union
There has been a sharply falling trend in the total volume of sales of agricultural pesticides in the EU between 1991 and 1995. But this was reversed in 1996. From 1991-1995, EU sales of pesticides, measured by weight of active ingredients (ai), fell by 13%. They then rose by 6% between 1995 and 1996 to stand at 299,826 tonnes ai. But this still put them nearly 8% below the 1991 figure. The use ...
Need help finding the right suppliers? Try XPRT Sourcing. Let the XPRTs do the work for you