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The Importance of Sample Homogenization in the Context of Pesticide Residue Analysis with the QuEChERS Method
12 May 2014This application note shows that the QuEChERS method is a very efficient and time-saving procedure to analyze food samples for pesticide residues. RETSCH’s laboratory grinders GM 200 and GM 300 are used to produce homogeneous and representative analytical samples.
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Sample PreparationSample preparation can improve the quality and speed of separation techniques. Products to assist sample preparation include filtration equipment, evaporators, membranes and sieves.QuEChERSThe QuEChERS (Quick, Easy, Cheap, Effective, Rugged, and Safe) method is a streamlined approach that is used to extract multi-residue target compounds from food samples. It is most commonly used by analytical chemists studying pesticide residues in food.Homogenizers and BlendersHomogenizers and blenders are used to homogenize various types of material, including tissue, cells, plants, food, soil, biological and chemical samples for subsequent analysis. Lab equipment for sample homogenization includes handheld and benchtop homogenizers, bead mill, ultrasonic and multiple sample homogenizers, high shear homogenizers and blenders. Homogenizer bead and probe multipacks are available to avoid cross contamination of samples, as well as cooling systems for homogenizing temperature-sensitive samples. Homogenizers are often used in the first step of extraction of DNA, RNA and proteins from tissue and cell samples. Find the best homogenizers and blenders in our peer-reviewed product directory: compare products, check customer reviews and receive pricing direct from manufacturers.PesticidesPesticides 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. Food TestingFood testing refers to a variety experiments including PCR, mass spectrometry, processing, QuEChERS, analyzing and Kjeldahl.Sample ProcessingSample processing is required to prepare samples prior to analysis. Technologies used for sample processing include homogenizers, grinders, mills and mixers.homogenization