Pesticide Multi-Residue Analysis (MRA) - Expanded Screen
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Price
$725 per analysis
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Turnaround time 7 – 9 Business Days
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Rush Available
Technical data sheet
Print- Method description
Pesticides in this screen are extracted using modifications of the QuEChERS (Quick, Easy, Cheap, Effective, Rugged, and Safe) method. The QuEChERS method, originally developed by the FDA and USDA, is an AOAC Official Method (2007.01). Modifications were necessary for the extraction of pesticides in dry commodities (J. Agric. Food Chem, 2010, 58, 5959-5972) and high-fat commodities (J. Agric. Food Chem, 2010, 58, 5950-5958). A mixture of acetonitile and water (for dry commodities) or acidified acetonitrile (for high moisture fruits, vegetables, and other samples with high water content), is used to extract any pesticide residue from the sample. The sample and solvents are then treated with an extraction media to isolate the pesticide residues in the acetonitrile. The extract is cleaned using dispersive solid-phase extraction. Cleaned extracts are analyzed by Capillary Gas Chromatography Time of Flight Mass Spectrometry (GC/TOFMS), Ultra Performance Liquid Chromatography Tandem Mass Spectrometry (UPLC/MSMS), and Gas Chromatography Tandem Mass Spectrometery (GC/MSMS). Identification, confirmation, and quantification are performed using both technologies. Sample extracts are compared against a matrix-matched standard. Method and instrument performance standards are analyzed with each sample to ensure quality results.
- Acceptable matrices
Baking mixes, beans, cereals, doughs, flaxseed, fruit/vegetable juices, fruits, grains, pasta/semolina, pastries, popcorn (no butter), soups, sugar (corn syrup), vegetables, grass, hay, fresh (not dried) herbs, and water. The scope extends from these individual matrices to matrices that share the same crop groups or are of like composition.
- Unacceptable matrices
Honey, nutraceuticals, raw ingredients with oil base, starches, fiber ingredients, supplements, vitamin premixes, dairy, meat, coffee, and tea.
- Equipment
LC/MSMS, GC/TOFMS, GC/MSMS
- Method reference
AOAC 2007.01 with modifications
- Reportable unit
mg/kg
- Sample size requirements
500 g
- Information required by submitter
Please provide as detailed of a matrix description as possible for appropriate crop group determination (i.e. Apple Juice, NOT Fruit Juice)
- Additional information
Good sample descriptions and estimates are helpful.
Common Pesticide Multi-Residue Analysis (MRA) - Expanded Screen Testing Questions
We make every effort to keep our methods and detection limits up to date according to the latest standards and qualifications. If you have any questions regarding the limit of detection/quantification or method references, please contact our Customer Service team at 1-800-245-5615.
Our standard turnaround time is 10 business days for most assays. There are some assays that require a longer turnaround time. We also offer a RUSH service that is half the time of the standard turnaround time of the assay at double the cost of the assay. A few assays that we provide cannot be rushed due to the nature of the test. Please check the specific assay you are interested in regarding the ability to RUSH the turnaround time.
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