Related Experiment Videos
Estimating in vitro glass fiber dissolution rate from composition.
W Eastes1, R M Potter, J G Hadley
1Owens Corning, Science and Technology Center, 2790 Columbus Road, Route 16, Granville, OH 43023-1200, USA. walter.eastes@owenscorning. com
Inhalation Toxicology
|March 15, 2000
Summary
This study presents a new method to calculate the dissolution rate constant of borosilicate glass fibers in the lung using their oxide composition. This calculation aids in predicting potential health risks from fiber inhalation.
Area of Science:
- Materials Science
- Toxicology
- Inorganic Chemistry
Background:
- Borosilicate glass fibers are used in various applications, and their dissolution in biological environments is crucial for toxicological assessment.
- Accurate prediction of dissolution rates is essential for understanding potential health effects, particularly following inhalation exposure.
Purpose of the Study:
- To develop and validate a method for calculating the in vitro dissolution rate constant of borosilicate glass fibers.
- To correlate the dissolution rate constant with the oxide composition of the glass fibers.
Main Methods:
- A linear function was established correlating the logarithm of the dissolution rate with the oxide composition (weight percent).
- The method was validated using a set of borosilicate glass fiber compositions with varying dissolution rate constants.
Main Results:
- The calculated dissolution rate constants showed good agreement with measured values across a range of compositions.
- The predictive capability of the method was demonstrated over a significantly wider range of dissolution rates than initially used for parameter determination.
Conclusions:
- The developed method provides a reliable estimation of borosilicate glass fiber dissolution rates based on composition.
- This approach can be utilized to assess the potential for disease development after animal inhalation or intraperitoneal studies, aiding in risk assessment.