Pesticide Multi-Residue Analysis (MRA) – Glyphosate Test
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Price
$315 per analysis
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Turnaround time
7 - 9 business days
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Rush
Available
Technical data sheet
PrintMethod description
Glyphosate is a broad spectrum herbicide applied widely to many crops such as corn, soybean, and oats. It may also be applied as a drying agent prior to harvesting crops. Glyphosate may degrade into aminomethylphosphonic acid (AMPA) via microbial degradation in the soil. AMPA may be taken up in biota, but often is measured at much lower concentrations than glyphosate. Glyphosate and AMPA are highly polar and zwitterionic compounds requiring unique extraction and analytical chromatographic conditions apart from a traditional multi-residue analysis (MRA) method. The extraction requires the use of an acidified solvent containing a chelating agent to first precipitate the protein and to bind any metal ions that may interact with the target analytes. The extract is cleaned with solid phase extraction and acquired with a solvent calibration curve by liquid chromatography tandem mass spectrometry (LC-MS/MS).
Acceptable matrices
Cereal grains, soybeans, sugar, and milk
Equipment
QTRAP LC-MS/MS
Method reference
Please contact us for the method reference.
Reportable unit
ppm (mg/kg)
Sample size requirements
20 grams
Additional information
If an incurred residue is detected, it must be validated prior to being reported as a verified residue. A non-verified residue is a presumed detection or estimated concentration. The concentration reported could change with further validation work. Validation of a non-verified residue can be requested within 30 days from the time the residue is reported. Validation testing has a cost of $200.
Samples will be reported as follows:
| Non-Detect | Samples with no detected residues |
| Verified Residues | < LOQ: Residues between the limit of detection (LOD) and the limit of quantitation (LOQ), with the LOQ following in parenthesis. |
| Samples with residues detected above the LOQ will be reported with a value. | |
| Non-Verified Residues | < LOQ: Residues between the limit of detection (LOD) and the limit of quantitation (LOQ), with the LOQ following in parenthesis. |
| Samples with residues detected above the LOQ will be reported with a value. |
Common Pesticide Multi-Residue Analysis (MRA) – Glyphosate Test 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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