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Determination of Pesticides from Aqueous Samples Using Atlantic HLB SPE Disks
16 Sept 2012This application note was demonstrates the extraction of five organophosphate compounds (Monocrotophos, Diazinon, Malathion, EPN, and Methamidaphos) using one solid phase extraction method with one pre-treatment step of sodium chloride NaCl. This method, using the Horizon SPE-DEX 4790 automated SPE extraction system, enables fast extraction times while yielding excellent recoveries of all five organophosphate pesticides of interest in this study. This method employing a combination of salt addition to the sample matrices as a pre-step followed by SPE extraction can also serve as a model extraction method for other extremely hydrophilic compounds that normally would be difficult to get good extraction recoveries.
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Environmental Monitoring and TestingEnvironmental monitoring and testing uses handheld portable analyzers, kits, spectrometers or chromatography systems for air, water, soil, food and other sample testing. Useful features of analyzers such as BOD and COD include portability, easy calibration, automation and sensitivity. Environmental test kits for pH, water, moisture, etc, should be accurate, sensitive, reliable, fast and easy to use.Solid-Phase ExtractionSolid-phase extraction (SPE) is used for clean-up, extraction and concentration of semi-volatile or non-volatile analytes from complex mixtures including blood, urine and food samples. Multiple formats are available for conducting SPE, including prepacked SPE cartridges, disks and microplates, as well as SPE sorbent powders for manual packing. SPE systems can be used to automate the process and extract multiple samples at once. Solid-phase microextraction (SPME) and supported liquid extraction (SLE) products are also available in the same formats. Find the best SPE, SLE and SPME equipment in our peer-reviewed product directory: compare products, check customer reviews and receive pricing direct from manufacturers.Food and Beverage AnalyzersFood and Beverage Analyzers are commonly used to provide information about the chemical composition, structure and physical properties of food materials.MalathionEPNMethamidaphosMonocrotophosDiazinonPesticidesPesticides are used to protect crops from diseases, pests and unwanted plants. They are classed as persistent organic pollutants (POPs) and can be harmful to humans. The Environmental Protection Agency (EPA) currently regulates the use of pesticides in the USA.