Pesticide Multi-Residue Analysis (MRA) - Acid Herbicides (ACH)
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Price
190
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Turnaround time 7 - 9 Business Days
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Rush Available
Technical data sheet
Print- Method description
Acidic herbicides 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 acidic herbicides (J. Agric. Food Chem. 2015, 63, 9657-9665).
This method is applicable to 30 non-esterified acidic herbicides and reported as the free acid. The sample is hydrated and extracted with acidified acetonitrile. Phase separation is achieved by a salting out with magnesium sulfate and sodium chloride, followed by centrifugation. The resulting organic layer is further cleaned using dispersive solid-phase extraction or freeze-out and acquired with a solvent calibration curve by liquid chromatography tandem mass spectrometry (LC-MS/MS).
- Acceptable matrices
Cereal grains (cereals, baking mixes, pastas, etc.), dairy infant powder, root and tuber vegetables (potato, carrot, etc.), leafy greens (celery, lettuce, etc.), grass forage, fodder and hay, pome fruits (apple, pear, etc.), berries (blackberry, raspberry, etc.), honey, and succulent or dried legumes.
- Unacceptable matrices
Unacceptable matrices will be sent to a third-party lab for testing.
- Equipment
LC/MSMS
- Method reference
AOAC 2007.01 with modifications
- Reportable unit
ppm (mg/kg)
- Sample size requirements
50 g
- Information required by submitter
Please provide fat estimates.
Please do not write with a marker or a Sharpie on the sample or sample packaging as this may contaminate the sample and affect the results.
Common Pesticide Multi-Residue Analysis (MRA) - Acid Herbicides (ACH) 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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