Quality assurance assay for controlled-release agrochemical formulations
High-throughput assay for evaluating active ingredient distribution and release from controlled-release agrochemical formulations. The method distinguishes surface-bound from entrapped active ingredients, enabling prediction of premature release and improved formulation design for more efficient and sustainable agrochemical delivery.
Overview
This offering is a high-throughput quality assurance assay designed to evaluate the distribution and release behavior of active ingredients in controlled-release agrochemical formulations. The technology addresses a critical challenge in agrochemical delivery: premature release of active ingredients, which can reduce product performance and efficiency in field applications. By characterizing how active ingredients are distributed within and released from polymeric particle matrices, the assay enables formulation developers to predict release reliability and optimize product design for sustainable agricultural use.
Technical specifications
The assay couples particle size separation with quantification of active ingredient loading and release, enabling distinction between surface-bound and entrapped active ingredients in polymeric particles. Key technical features include:
- High-throughput design with lower sample volume requirements compared to standard methods such as dialysis
- Mechanistic insight by identifying whether active ingredient is entrapped within the particle matrix or present on the surface
- Predictive capability based on the relationship between active ingredient hydrophobicity and its distribution within particles, where entrapped active ingredient demonstrates the desired controlled release while surface-bound active ingredient is susceptible to premature loss
- Compatibility with complex matrices, including the presence of proteins, humic acids, and suspended soil particles relevant to agricultural settings
- More reliable release profiles than conventional dialysis-based assays
Technology readiness level
The assay has been developed and validated in the principal investigator's laboratory, with results published in the Journal of Controlled Release demonstrating its ability to monitor active ingredient release from polymeric particles. Preliminary data on additional active ingredients suggest the assay can predict whether a formulation maintains reliable release or whether release is influenced by matrix species. The technology is ready for collaborative validation with industry partners across a range of active ingredients, formulation chemistries, and environmental conditions including temperature, pH, and matrix complexity. Future development aims to correlate in vitro results with field performance data.
About University of Houston, Downtown
University of Houston–Downtown is a public, urban university within the University of Houston System, serving a diverse metropolitan student body and working professionals. Its location in the city’s business core gives companies easy access to faculty expertise, student talent, and on-campus labs for sponsored projects, internships, and capstone collaborations. Flexible engagement models—short courses, certificates, and customized contracts—help employers upskill teams and pilot solutions with minimal friction. Research activity is supported by competitive federal and state funding. A dedicated research administration office facilitates agreements, compliance, and IP management, coordinating commercialization pathways across the UH System when appropriate.
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