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Electronic paramagnetic resonance spectrometer

Contact person:

Prof. Radostina Stoyanova

e-mail: radstoy@svr.igic.bas.bg
tel. +359 2 979 39 15

EMXplus10/12, Bruker BioSpin GmbH

The manufacturer of Electronic paramagnetic resonance spectrometer (EMXplus EPR spectrometer) is Bruker. Electronic paramagnetic resonance is a non-destructive method for the investigation of paramagnetic substances (i.e. containing unpaired spins) in the form of powder, monolithic samples, solutions, etc. It is used in various fields of science such as chemistry, physics, medicine, pharmacy, biochemistry, geology, archeology (including dating), as well as the quality of food and drinks, glass and ceramics production etc.

This spectrometer allows irradiation of the samples at two frequencies of electromagnetic radiation, for the X-band – 9.4GHz and for the Q-band – 35 GHz respectively. The values of the electromagnetic field interacting with the unpaired electrons in the sample are 0 to 0.8 T for the X range and 0.8 to 1.4 T for the Q range. There is an opportunity to amplify the electromagnetic field up to 1.7 T. With available UV system is possible to test photosensitive chemicals. Wide temperature measurements: from 100 to 600 K. Software “Symphony" to determine the parameters of the EPA spectra.

High sensitivity – up to 10-6ppm for solid samples and up to 10-2 ÷ 10-3mol / l for liquids. The samplers are quartz tubes with a diameter of 2, 3 and 4 mm, respectively, and a flat quartz cuvette for liquids.

The application of the EPR spectrometer is for the study of paramagnetic ions such as manganese, copper, cobalt, chromium, iron, nickel, vanadium, platinum, etc., analysis of free radicals in solid and liquid state and calculation of paramagnetic ions and radicals.