Roger Evans

Title: Roger Evans: Innovator in Mercury Analysis

Introduction

Roger Evans is a notable inventor based in North Hampton, NH (US). He has made significant contributions to the field of mass spectrometry, particularly in the analysis of mercury concentrations. His innovative approach has led to advancements in the measurement of Hg-196 concentration.

Latest Patents

Roger Evans holds a patent for a "Manifold and method of batch measurement of Hg-196 concentration." This invention involves a sample manifold and a method that allows for the analysis of milligram quantities of mercury using mass spectrometry. The method enables the determination of the Hg-196 concentration to less than 0.02 atomic percent. By utilizing natural mercury as a standard, the accuracy achieved is ±0.002 atomic percent. The preferred mass spectrometer for this process is a commercially available GC/MS manufactured by Hewlett Packard. The novel sample manifold is designed to be contained within an oven, which allows for controlled flow rates of mercury into the mass spectrometer. Additionally, the manifold connects to an auxiliary pumping system that facilitates the rapid cleanup of residual mercury. The sample cycle time for this process is approximately one hour.

Career Highlights

Roger Evans is associated with GTE Products Corporation, where he has been able to apply his expertise in mass spectrometry and mercury analysis. His work has contributed to the development of more accurate and efficient methods for measuring mercury concentrations.

Collaborations

Roger has collaborated with Mark W. Grossman, enhancing the research and development efforts within their field.

Conclusion

Roger Evans is a distinguished inventor whose work in mercury analysis has paved the way for more precise measurement techniques. His contributions continue to impact the scientific community positively.