Determination of glyphosate and AMPA in oatmeal and oat-based breakfast cereals for the selection of candidate reference materials
Justine M. Cruz, Jacolin A. Murray
The use of reference materials (RMs) is critical to improve measurements accuracy for validating and testing the accuracy of analytical protocols. To the best of our knowledge, there is no food-based matrix RM currently available for glyphosate. The National Institute of Standards and Technology (NIST) is in initial stages of developing a glyphosate in oat-based RM. The first aim of this study was to optimize and validate a robust method for the extraction and analysis of glyphosate and aminomethylphosphonic acid (AMPA). The optimized method was used to screen nine commercially available oat-based cereals to identify candidate RMs. Glyphosate was detected in all samples, with the highest glyphosate mass fraction of 1100 ng/g; lower levels were measured in cereals from organic agriculture. AMPA was quantified in six samples up to 40 ng/g. The findings of this study led to the identification of several candidate RMs, with "high" and "low" glyphosate levels.
and Murray, J.
Determination of glyphosate and AMPA in oatmeal and oat-based breakfast cereals for the selection of candidate reference materials, Food Chemistry, [online], https://doi.org/10.1016
(Accessed May 10, 2021)