Ultrasonic Dissolution Testing in Small-Volume Solvent
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Solution Overview
Problem
Current dissolution testing methods for pharmaceutical compounds are resource-intensive and require large volumes of solvent, making them impractical for testing multiple tablets, and are limited to laboratory settings, which hinders the detection of substandard or counterfeit medicines in low-resource areas.
Innovation Solution
The use of ultrasonic agitation systems that combine a compound with a solvent, agitate the mixture using a sonicator, and sample the solution at intervals to determine kinetic release behavior, allowing for portable and efficient testing of pharmaceutical compounds in smaller volumes.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If conventional dissolution testing apparatuses use forced convection with large volumes of solvent, then dissolution testing can be performed, but the testing becomes resource-intensive and cannot be easily ported to low-resource areas
Solution Approach 1:
The patent replaces conventional mechanical forced convection systems with ultrasonic vibration-based dissolution testing. The ultrasonic horn generates high-frequency vibrations that create cavitation and enhance mass transfer, eliminating the need for large-volume apparatuses and complex mechanical mixing systems. This substitution enables portable testing in low-resource settings while maintaining reliable dissolution testing capability.
2Reliability
If conventional dissolution testing uses large volumes of solvent (up to 1 liter per tablet), then dissolution can be achieved, but testing multiple tablets becomes resource-intensive
Solution Approach 1:
The patent fundamentally changes the physical parameters of the dissolution system by introducing ultrasonic vibration at high frequencies (typically 20-100 kHz). This parameter change creates intense local cavitation and micro-jetting effects that dramatically enhance dissolution rates, allowing accurate dissolution testing to be achieved in much smaller solvent volumes (milliliters rather than liters), thereby reducing resource consumption while maintaining testing accuracy.
3Manufacturing precision
If conventional dissolution testing protocols are highly regulated with specific apparatus dimensions and vibrational stability requirements, then testing standardization is achieved, but device complexity and portability are reduced
Solution Approach 1:
The patent replaces complex mechanical vibration control systems with ultrasonic vibration technology. The ultrasonic horn, when driven at its resonant frequency, provides highly stable and controlled vibrations without requiring complex mechanical dampers, precision mounts, or active control systems. This substitution maintains testing standardization through consistent ultrasonic parameters (frequency, amplitude) while dramatically simplifying the overall apparatus design and enabling portability.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables accurate and repeatable kinetic release testing of pharmaceutical compounds in smaller volumes, facilitating the detection of substandard medicines outside laboratory settings, particularly in low-income countries, and improving the efficiency and portability of drug release analysis.
Implementation Method 1
activate a sonicator to agitate the sample to transform the sample into a solution
Implementation Method 2
a sonicator configured to produce cavitation and acoustic streaming delivered to the one or more compounds in the vessel
Implementation Method 3
a sonicator configured to produce cavitation and acoustic streaming delivered to the one or more compounds in the vessel
Data Source
AI summary
Systems, devices, and methods for kinetic release testing of compounds are discussed herein. Ultrasonic agitation, with resultant cavitation and acoustic streaming, is used to breakdown and release drugs from one or more compounds to form a solution. The system uses small volumes of solvent to increase accessibility and portability of the system. Once dissolved, the solution is passed to a sampling system for calculating kinetic release behavior. The kinetic release behavior can be compared to existing reference data to identify the compound and/or confirm accurate manufacture by comparison of dissolution characteristics of the active ingredients. In some embodiments, streak photography and hydrophone measurements are used to study the effects of system parameters on the acousto-hydrodynamic environment.