Frederic G Dewalt

Title: Frederic G Dewalt: Innovator in Chemical Testing Methods

Introduction

Frederic G Dewalt is a notable inventor based in Landenberg, Pennsylvania. He has made significant contributions to the field of chemical testing, particularly in the detection of lead in various media. With a total of two patents to his name, Dewalt's work addresses critical issues in chemical testing methodologies.

Latest Patents

Dewalt's latest patents include a method for producing a purple complex for the presence of lead using sodium rhodizonate without the use of strong acid. This innovative method employs ascorbic acid (Vitamin C) as part of a chemical test kit, utilizing sodium rhodizonate as the coloring agent. This approach allows for a yellow-orange to purple color transition, facilitating the detection of lead while eliminating the need for strong acids.

Another significant patent is a method for controlling the sensitivity and response point of chemical test kits for metals in paint and other media. This invention addresses two common challenges in using chemical test kits for lead detection: the conversion of paint samples into small enough particles to dissolve the metal and controlling the exposure of the sample to the chemicals. Dewalt's method involves using a coffee grinder or equivalent tool along with a solid food product to break up the paint sample, thereby diluting the concentration of the metal and achieving a positive response at the desired concentration.

Career Highlights

Frederic G Dewalt has dedicated his career to improving chemical testing methods. His innovative approaches have made significant strides in ensuring safer and more effective detection of hazardous materials, particularly lead in paints and coatings. His work is crucial for industries that require reliable testing methods to ensure compliance with safety standards.

Collaborations

Dewalt has collaborated with David C Cox, contributing to the advancement of chemical testing technologies. Their partnership has fostered innovation and the development of effective solutions in the field.

Conclusion

Frederic G Dewalt's contributions to chemical testing methods highlight his commitment to innovation and safety. His patents reflect a deep understanding of the challenges faced in detecting hazardous materials, making a positive impact in various industries.