A Radiofrequency (220-MHz) Fourier Transform EPR Spectrometer

✍ Scribed by Marcello Alecci; John A Brivati; Giuseppe Placidi; Antonello Sotgiu

• Publisher: Elsevier Science
• Year: 1998
• Tongue: English
• Weight: 234 KB
• Volume: 130
• Category: Article
• ISSN: 1090-7807
• DOI: 10.1006/jmre.1997.1300

✦ Synopsis

Radiofrequency continuous wave EPR spectrometers for detecting and localizing free radicals in vivo in samples of 50-100 g have been developed. The main limitation of these EPR instruments is the slow acquisition time, and a sensible improvement is expected by the adoption of pulsed EPR techniques. We present here a Fourier transform EPR spectrometer operating at 220 MHz suitable for large volume samples (up to 50 ml). A detailed description of the transmitter and receiver sections, including the EPR resonator, is given. Representative free induction decay data obtained from a sample with a relaxation time of about 900 ns are reported. Copyright 1998 Academic Press.