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Related Experiment Video

Updated: Jun 26, 2026

An Inverse Analysis Approach to the Characterization of Chemical Transport in Paints

An Inverse Analysis Approach to the Characterization of Chemical Transport in Paints

Published on: August 29, 2014

Rapid new methods for paint collection and lead extraction.

William F Gutknecht¹, Sharon L Harper, Wayne Winstead

¹RTI International, P.O. Box 12194, Research Triangle Park, NC 27709, USA. wfg@rti.org

Journal of Environmental Monitoring : JEM

|January 13, 2009

Summary

This study introduces efficient methods for collecting and extracting lead from paint samples. These advancements may lead to a new lead paint test kit meeting EPA regulations.

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An Inverse Analysis Approach to the Characterization of Chemical Transport in Paints

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Published on: December 6, 2015

Area of Science:

Environmental Science
Analytical Chemistry
Occupational Health

Background:

Chronic lead exposure causes significant health issues in children and adults.
Lead-based paints are a primary source of lead exposure, especially during renovation activities.
New U.S. Environmental Protection Agency (EPA) regulations require on-site, inexpensive lead-based paint identification.

Purpose of the Study:

To develop efficient methods for lead paint sample collection and lead extraction.
To enable the creation of a lead paint test kit compliant with EPA requirements.

Main Methods:

A modified wood drill bit was used for efficient paint sample collection.
A novel one-step method quantitatively grinds and extracts lead using a high-speed rotor and stator.
Paint particles are reduced to approximately 50 microns, with lead extraction in nitric acid (<3 minutes).

Main Results:

The new paint collection method is highly efficient.
The quantitative extraction procedure consistently achieves >95% lead recovery.
The methods were validated using real-world paints and certified reference materials.

Conclusions:

The developed methods for paint collection and lead extraction are effective and quantitative.
These methods may facilitate the development of a lead paint test kit meeting EPA specifications.
This work addresses the need for on-site, inexpensive lead-based paint identification.