Survey of Glyphosate Residues in Honey, Corn and Soy Products

Fern,; Rubio, Olga Díaz; Guo, Emily L.; Kamp, Lisa

doi:10.4172/2161-0525.1000249

Cited by 43 publications

(40 citation statements)

References 24 publications

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“…Nonetheless, glyphosate residues were reported in bottled drinking water (Rendón-von Osten and Dzul-Caamal, 2017). Glyphosate residues were detected in honey and soy sauce (Rubio et al, 2014), in produce (Bøhn et al, 2014), processed food products, even in human specimens (blood, urine, mother's milk) (Knudsen et al, 2017;Rendón-von Osten and Dzul-Caamal, 2017). It should be noted, however, that measurements of glyphosate in complex biological matrices e.g., blood and breast milk, that led to positive scores used ELISA methods of questionable accuracy, and instrumental analysis by LC-MS/MS did not find glyphosate above its limit of detection in human breast milk (McGuire et al, 2016;Steinborn et al, 2016).…”

Section: Exposure To Glyphosate-environmental and Food Analysis Humamentioning

confidence: 99%

Re-registration Challenges of Glyphosate in the European Union

Székacs

Darvas

2018

Front. Environ. Sci.

106

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Section: Exposure To Glyphosate-environmental and Food Analysis Humamentioning

confidence: 99%

Re-registration Challenges of Glyphosate in the European Union

Székacs

Darvas

2018

Front. Environ. Sci.

106

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“…In recent years, glyphosate quantification has been established in different matrices including water, soil and food . Nevertheless, it was claimed that the current methodology for glyphosate analysis is not sufficient, stating that monitoring should be intensified .…”

Section: Resultsmentioning

confidence: 99%

“…In recent years, glyphosate quantification has been established in different matrices including water, soil and food. 20,23,24,26 Nevertheless, it was claimed that the current methodology for glyphosate analysis is not sufficient, stating that monitoring should be intensified. 33 Since there is an interest in the effect of glyphosate on the metabolism of intestinal microbiota, we applied the method to quantify glyphosate and AMPA in bioreactor media.…”

Section: Applicationmentioning

confidence: 99%

“…Currently, glyphosate quantification methods have been established in water, soil, food products and body fluids such as urine and breast milk . To the best of our knowledge, there are no studies reporting the quantitation of glyphosate from bacterial culture media used in bioreactors.…”

Section: Introductionmentioning

confidence: 99%

“…23 Currently, glyphosate quantification methods have been established in water, soil, food products and body fluids such as urine and breast milk. 20,[23][24][25][26] To the best of our knowledge, there are no studies reporting the quantitation of glyphosate from bacterial culture media used in bioreactors. Bioreactors can be used to simulate conditions found in the intestinal tract of animals and humans in vitro, but the media are accordingly complex.…”

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confidence: 99%

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Quantification of glyphosate and aminomethylphosphonic acid from microbiome reactor fluids

Fritz-Wallace

Engelmann

Krause

et al. 2020

Rapid Comm Mass Spectrometry

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Rationale Glyphosate is one of the most widely used herbicides and it is suspected to affect the intestinal microbiota through inhibition of aromatic amino acid synthesis via the shikimate pathway. In vitro microbiome bioreactors are increasingly used as model systems to investigate effects on intestinal microbiota and consequently methods for the quantitation of glyphosate and its degradation product aminomethylphosphonic acid (AMPA) in microbiome model systems are required. Methods An optimized protocol enables the analysis of both glyphosate and AMPA by simple extraction with methanol:acetonitrile:water (2:3:1) without further enrichment steps. Glyphosate and AMPA are separated by liquid chromatography on an amide column and identified and quantified with a targeted tandem mass spectrometry method using a QTRAP 5500 system (AB Sciex). Results Our method has a limit of detection (LOD) in extracted water samples of <2 ng/mL for both glyphosate and AMPA. In complex intestinal medium, the LOD is 2 and 5 ng/mL for glyphosate and AMPA, respectively. These LODs allow for measurement at exposure‐relevant concentrations. Glyphosate levels in a bioreactor model of porcine colon were determined and consequently it was verified whether AMPA was produced by porcine gut microbiota. Conclusions The method presented here allows quantitation of glyphosate and AMPA in complex bioreactor fluids and thus enables studies of the impact of glyphosate and its metabolism on intestinal microbiota. In addition, the extraction protocol is compatible with an untargeted metabolomics analysis, thus allowing one to look for other perturbations caused by glyphosate in the same sample.

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Bumblebees can be Exposed to the Herbicide Glyphosate when Foraging

Thompson

Smith

White

et al. 2022

Enviro Toxic and Chemistry

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Herbicides are the most widely used pesticides globally. Although used to control weeds, they may also pose a risk to bee health. A key knowledge gap is how bees could be exposed to herbicides in the environment, including whether they may forage on treated plants before they die. We used a choice test to determine if bumblebees would forage on plants treated with glyphosate at two time periods after treatment. We also determined whether glyphosate and its degradation product aminomethylphosphonic acid were present as residues in the pollen collected by the bees while foraging. Finally, we explored if floral resources (nectar and pollen) remained present in plants after herbicide treatment. In general bees indiscriminately foraged on both plants treated with glyphosate and controls, showing no avoidance of treated plants. Although the time spent on individual flowers was slightly lower on glyphosate treated plants, this did not affect the bees' choice overall. We found that floral resources remained present in plants for at least 5 days after lethal treatment with glyphosate and that glyphosate residues were present in pollen for at least 70 h posttreatment. Our results suggest that bees could be exposed to herbicide in the environment, both topically and orally, by foraging on plants in the period between herbicide treatment and death. Identifying this route of exposure is a first step in understanding the risks of herbicides to bees. The effects of herbicides on bees themselves are uncertain and warrant further investigation to allow full risk assessment of these compounds to pollinating insects.

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Survey of Glyphosate Residues in Honey, Corn and Soy Products

Cited by 43 publications

References 24 publications

Re-registration Challenges of Glyphosate in the European Union

Re-registration Challenges of Glyphosate in the European Union

Quantification of glyphosate and aminomethylphosphonic acid from microbiome reactor fluids

Bumblebees can be Exposed to the Herbicide Glyphosate when Foraging

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