John Christian Fjeldsted

Title: John Christian Fjeldsted: Innovator in Ion Mobility Spectrometry and Mass Spectrometry

Introduction

John Christian Fjeldsted is a prominent inventor based in Redwood City, CA (US). He holds a total of 10 patents that showcase his contributions to the fields of ion mobility spectrometry and mass spectrometry. His innovative work has significantly advanced the understanding and measurement of ions in various applications.

Latest Patents

Fjeldsted's latest patents include a method for measuring the collision cross section (CCS) of ions utilizing ion mobility spectrometry. This method calculates the CCS by measuring the total drift time taken by a sample ion to travel through a drift cell to an ion detector. The CCS is determined based on the total drift time and a proportionality coefficient that defines the time taken by the sample ion in different regions. Another notable patent is for a mass spectrometer designed to enhance the resolution of mass spectra. This device includes an ion detector, an analog-to-digital converter, and a sample adjuster that identifies peaks in the mass spectrum to improve resolution.

Career Highlights

Throughout his career, Fjeldsted has worked with leading companies such as Agilent Technologies, Inc. and Hewlett-Packard Company. His experience in these organizations has allowed him to develop and refine his innovative techniques in mass spectrometry and ion mobility.

Collaborations

Fjeldsted has collaborated with notable individuals in his field, including August Jon Hidalgo and William Daniel Frazer. These partnerships have contributed to the advancement of technology in ion mobility and mass spectrometry.

Conclusion

John Christian Fjeldsted's contributions to the fields of ion mobility spectrometry and mass spectrometry are significant. His innovative patents and collaborations reflect his dedication to advancing scientific understanding and technology.