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700 MHz NMR spectrometer

Description: 700 MHz NMR spectrometer

Technical specification: 9.4 Tesla permanent magnetic field . Room temperature homogeneity outdoor activities ( shim ) system for optimal magnetic field homogeneity needed for 1D , 2D and 3D experiments without rotation of the sample cuvette , and not less than 20 orthogonal gradient control. Not less than 2 equivalent and interchangeable frequency channels of communication with the full wide -frequency generation in each , and the minimum interval for each channel 6-430 MHz Complete digital phase and amplitude of the best generation of long-term stability to achieve Digital real- time compensation The required frequency change: steps < 0.01 Hz Phase change: steps < 0.01 Grad, with no more than 25 ns duration Radio frequency system output signal phase singalong / accuracy by changing the power attenuation ( monotony ): not more than / - 0.5 and 90 dB power conversion range. Individual and / or along the phase , frequency and / or amplitude of the event time : no more than 25 ns Impulse control temporal resolution of 12.5 ns or less Software -controlled variable temperature unit , the temperature change of 0.1 ° C increments  . Temperature changes in the range - 150 to 180 ° . a) 5 mm head with actively shielded Z - gradient, can apply monitoring / irradiation of the NMR core range from 15N to 31P ( below) as well as 1H and 19F . Automatic selection, setting and atitaikymas all clusters interval from 15N to 31P . The ability to record the 1H and 19F spin interactions termination and vice versa . The minimum required parameters : Signal / Noise: 19F sensitivity ≥ 350:1 (TFT sample , the 1H interactions termination ) 31P sensitivity ≥ 150:1 ( TPP sample) 13C sensitivity ≥ 190:1 (ASTM test) 15N sensitivity ≥ 25:1 (90 % formamide sample) 1H sensitivity ≥ 450:1 (0.1 % EC sample , 200 Hz) Temperature changes at the interval narrower than from - 150oC to 150 oC . b ) CP / MAS head 15N - 31P , 1H ; Rotor size 4 mm, rotation frequency up to 15 kHz; shall be accompanied by a pneumatic module for precise spin speed , transfer MAS rotor system . The head must be compatible with automatic sample changer. Temperature changes in the range of -50 ° C to 80 ° C .

Usage area: for recording NMR spectra from solutions in various temperatures. 1H NMR, 13C NMR, 31P NMR, DEPT, INEPT, COSY, TOCSY, NOE, 13C HSQC, 13C HMBC.

Keywords: Nuclear magnetic resonance NMR, COSY, DEPT, HMBC, HSQC, NOE