X-ray fluorescence energy dispersive general purpose spectrometer BRA-135F
Energy Dispersive X-Ray Fluorescence Spectrometer BRA-135F is able to detect simultaneously about 20 chemical elements less than 200 sec over a wide concentration range from hundreds of ppb. BRA-135F is able to analyze solid, liquid and powder samples, as well as materials on the surface or deposits on the filters.
The vacuum measurement chamber and ultrathin input window of detector provides high analytical characteristics in range of light elements from 9 F to 17 Cl.
High-performance silicon drift detector (SDD) with low energy resolution (less 135eV) is able to define spectral lines almost all elements, that allows the analysis of complex multicomponent substances (high alloy steels, precision alloys, polymetallic ores, etc.).
Technical data
Range of determined elements from 9 F to 92 U Range of determination without preconcentration, %
-2
Range of determination with sample preconcentration depending on chemical element, % 1.5*10-5 Limit of the middle group elements detection in liquids, % n*10-5 Average time for 1 (one) sample analysis, sec 100 Energy resolution of MnKα line at the pulses counting rate up to 104 sec-1 , max, eV 145 Maximum voltage of the X-ray tube, kV 50 Power of the X-ray tube, W 10 Cooling of the X-ray tube air Primary X-ray radiation filters 5 Number of samples installed into sample changer, up to
Maximum size of substandard specimen, mm 200х60 Connection to Ethernet Yes Remote control Yes Overall dimensions of the instrument (L х W х H), mm 700х410х400 Weight of the instrument, kg 65 Power supply 220 V, 50 Hz Power consumption, VA 500
Process diagram Principle of Operation
Principle of spectrometer operation is based on the excitation of fluorescent radiation of atoms of material under examination by radiation coming from an X-ray tube. The fluorescence radiation from the specimen is selected by the semiconductor SDD detector where after being absorbed quanta of various energy are converted into electrical pulses with amplitudes being proportional to energy of these quanta. Pulse repetition frequency with a certain amplitude is proportional to chemical element concentration in the sample.