Test Price:
$270 per analysis
Acceptable Matrices:
Cereal grains, soybeans, sugar, and milk
Detection Limit:
0.010 ppm (mg/kg)
Sample Size Requirements:
20 grams
Equipment:
QTRAP LC-MS/MS
Reportable Units:
ppm (mg/kg)
Turnaround Time:
7-9 Business Days (matrix dependent)
5 Business Days for Rush (matrix dependent)
Is rush testing available?
Yes
Method Reference:
Please contact us for the method reference.
Method 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).
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. |
Contact Us:
If you have questions about our testing services, please contact us at +1 (800) 245-5615.