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Home / Pesticide Multi-Residue Analysis (MRA) - Acid Herbicides (ACH)

Pesticide Multi-Residue Analysis (MRA) - Acid Herbicides (ACH)

  • Price

    $190 per analysis

  • Turnaround time

    7 - 9 Business Days

  • Rush


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Pesticide Multi-Residue Analysis (MRA) - Acid Herbicides (ACH)

Technical data sheet


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.



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.

*Prices and offerings are subject to change without notice.

Common Pesticide Multi-Residue Analysis (MRA) - Acid Herbicides (ACH) Testing Questions

While our sales and customer service team are happy to answer general testing questions, consultations typically start at a rate of $250 per 30 minutes regarding the interpretation of reported test results or questions about our test methods. We cannot consult on regulations, tolerance limits, or claims.

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.

Medallion Labs, a division of General Mills, offers multiple areas of expertise for analytical testing and product evaluation for the food and ingredient industry. Our areas of expertise include Chemical Analysis, Nutritional Analysis, Food Safety, Shelf Life Studies, Microbiology, Specialty Fibers, Physical Testing, Allergen Testing, as well as Product Evaluation (which includes Product Performance and Sensory Evaluation) and Technical Consulting/Method Development. Our methods are developed for the testing of food products and ingredients.

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Medallion Labs

A food testing program designed with mid-market and enterprise food and ingredient manufacturers in mind.