The necessity for the improvement of food security and access to clean water is a global demand, primarily in arid regions facing impacts of climate change. Because of this, alternative techniques which reuse waste products for the conservation of precious resources while simultaneously improving farming techniques have become an important topic. Wastewater irrigation and biosolid amended soils are two common practices which decrease the demand for fresh water and minimize nutrient deposition in surface waters respectively. In addition to providing a sink for waste products of treatment facilities, these reuse systems also decrease costs associated with the production of bulk synthetic fertilizers while also minimizing use of clean water for crop irrigation. However, one consequence of these nutrient reuse systems is the introduction of new contaminants into food sources. Previous studies have investigated uptake of organic contaminants in crop tissue due to pesticide application, showing that crops can accumulate as well as metabolize organic contaminants. Because of these findings, studies investigating waste reuse systems have also investigated crop uptake of pharmaceuticals and personal care products (PPCPs), which are abundant in wastewater and biosolids. Stability of PPCPs vary in different matrices and environmental conditions, thus, sample shipment from field to the laboratory as well as storage associated with these studies should be investigated for potential degradation of analytes prior to extraction. A study analyzing PPCPs in carrot, lettuce, soil, and water samples was completed over one week and one month time increments to evaluate analyte loss. Results from this study suggest that some targeted analytes are lost prior to sample analysis using liquid chromatography with tandem mass spectrometry (LC/MS/MS) after 1 week. These findings highlight the importance of spiking isotopically labelled standards for quantification before sample storage, to compensate and correct for degradation of analytes in order to obtain more accurate quantification of PPCPs in agricultural samples.

Stability of pharmaceuticals and personal care products in agricultural samples: Case study investigating effect of shipping and long-term storage on concentrations

Macromolecular Chemistry: The Second Century

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ACS Spring 2020 National Meeting & Expo

The official archive and repository for all ACS Meetings & Expositions abstracts and select posters or presentations.