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Related Experiment Videos

Development of a controlled release formulation based on a starch matrix system.

Yongsong Cao1, Lu Huang, Jiuxin Chen

  • 1Department of Resource and Environment Science, No. 2678, Qixin Road, Shanghai Jiaotong University, Shanghai 201101, PR China.

International Journal of Pharmaceutics
|May 21, 2005
PubMed
Summary

This study developed a controlled release formulation (CRF) for acetamiprid insecticide using tapioca starch. The CRF demonstrated enhanced stability and tunable release rates, offering a promising alternative to conventional formulations.

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Area of Science:

  • Agricultural Chemistry
  • Materials Science
  • Insecticide Formulation

Background:

  • Conventional insecticide formulations often face challenges with stability and controlled delivery.
  • Acetamiprid is a widely used insecticide requiring optimized delivery systems.
  • Developing stable and effective controlled release formulations (CRF) is crucial for sustainable pest management.

Purpose of the Study:

  • To develop and characterize a controlled release formulation (CRF) of acetamiprid using tapioca starch, urea, and sodium borate.
  • To evaluate the stability and release kinetics of the developed acetamiprid CRF.
  • To investigate the influence of formulation components and granule size on acetamiprid release.

Main Methods:

  • Synthesis of acetamiprid CRF using tapioca starch, urea, and sodium borate.

Related Experiment Videos

  • Stability testing under UV radiation compared to emulsifiable concentrate (EC).
  • Release kinetics studies in water fitted to the generalized model Mt/Mz = kt(n) to determine release mechanisms and parameters like T50.

    • Main Results:

    • CRF recovery exceeded 95.43%, with urea content inversely affecting recovery.
    • Acetamiprid CRF exhibited significantly lower decomposition rates under UV radiation compared to EC.
    • Release kinetics were diffusion-controlled, with urea increasing T50 (slower release) and sodium borate decreasing T50 (faster release).
    • Smaller granule sizes resulted in faster active ingredient release.

    Conclusions:

    • Tapioca starch-based CRF offers enhanced UV stability for acetamiprid.
    • Formulation composition (urea, sodium borate) and granule size are key factors in controlling acetamiprid release rates.
    • The developed CRF provides a tunable system for acetamiprid delivery, potentially improving efficacy and reducing environmental impact.