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| E-Mail: | bourevestnik@bourevestnik.spb.ru | All services |
| Phone: | +7 (812) 676 1001 | |
| Fax: | +7 (812) 528 6633 | |
BRA-18 X-Ray Fluorescent Energy Dispersive Analyzer with a Semi-Conductor Detector
Brochure BRA-18
The BRA-18 analyzer is designated to determine chemical elements ranging from Na to U in solid, powder and liquid samples.
The basis for the analyzer operation is the excitation of the atoms in the sample of the substance being analyzed by radiation coming from an X-ray tube, that excites the flurescent of atoms for the elements in the sample. Flurescent radiation from the sample gets into the semiconductor detector where quanta having different energies are transformed into electric pulses, which amplitude is proportional to the energy of the absorbed quanta. BRA-18 analyzers use Si - pin detectors with Peltier temperature cooling effect.
By means of the analog-to- digital converter the sequence of electric pulses is transformed into the spectrum reflecting the energy spectrum of flurescent radiation from the sample. The analyzer control, spectrum processing and calculation of element concentrations are PC-aided. Software support provides the instrument calibration, quantitative analysis (also reference-free), and storage of the data obtained. Concentration is calculated in the sample elements, the analysis results are displayed as chemical symbols of the elements and their concentration values are carried out by analytical lines' intensity on the basis of pre-graduation or using the method of fundamental parameters. The software has a user-friendly interface providing simple and reliable operation.
Special Features
- availability of a vacuum measuring chamber provides feature-rich analytical properties for light elements ranging from Na (Z=11) to Cl (Z=17);
- Liquid nitrogen application is not required to cool the semi-conductor detector;
- 16 samples are loaded at the same time, with further operator-free automatic analysis as per the programme;
- Samples to be analyzed are outside the vacuum chamber, therefore the analysis for solid, powder and liquid samples is carried out in like simple manner;
- Powder samples do not need pressing, liquid samples do not require pressurizing, there are no rigid requirements for the sample surface quality; samples are loaded to the sample feed disk from above.
Application
Mining:
- analysis for ore composition;
- analysis for middlings' composition at different process steps;
Metallurgy:
- analysis for raw materials and furnace charge;
- proximate analysis in the course of the melting process;
- analysis for chemical composition in metals and alloys;
- ferrous and non-ferrous metal scrap recycling;
- ferrous and non-ferrous metal scrap sorting;
- analysis for chemical composition in alloys after scrap recycling.
Machine Building:
- incoming control for metals and non-metal materials;
- proximate analysis of chemical composition and grade of the material at any step of parts' manufacturing (irregular shape objects' analysis).
Engine Wear Diagnostics:
- oil grits' concentration analysis in the course of periodic engines' maintenance
Chemistry:
- analysis of chemical products at different process steps, both powders and solutions, without any actual sample preparation.
Jewellery Industry:
- precious metal analysis in alloys and pieces of jewellery.
Ecology, Agriculture, and Food Industry:
- measurement of contents for heavy metals in food, water, soil, and forage.
Forensic Expertise:
- non-destructive analysis of contents for micro-particles (metals, paints, materials, etc.);
- analysis of trace quantities in substances.
Specifications
| Range of chemical elements to be analysed | from Na(Z=11) to U(Z=92) |
| Range of concentrations analysed for chemical elements, % | from 10-3 to 100 |
| Detection limit, with no pre-concentration, % mass: |
|
| for the middle group elements | n*10-4 |
| for light elements | 10-3...10-1 |
| Mass detection limit, μg | 0.05...2.0 |
| Energy resolution at MnKα line, eV | 230 |
| Average time for one sample analysis, sec | 60 |
| Reference instrumental error, % | 0.5 |
| Maximum X-ray tube power, W | 10.0 |
| X-ray tube voltage, kV (3 kV-steps) | 5.5-45 |
| Number of samples loaded at the same time | 16 |
| Diameter of cell for the analysis of liquid and powder samples, mm | 31.5 |
| Dimensions for solid and pressed samples, mm diameter/height | 5-60/70 |
| Overall dimensions, mm | 540х300х600 |
| Mass of the instrument, kg | 65 |
The analyzer is registered in the State Register for Measurement Instruments, No. 31298-06.
The BRA-18 analyzer was successfully carried out to apply for the analysis of the following materials:
The BRA-18 analyzer was successfully carried out to apply for the analysis of the following materials:
- different grades of cast iron, steel, bronze, brass;
- base ores and products of mining concentration facilities (iron ore, copper and molybdenum, tantalum and niobium, tin);
- silica sands, glass, magnesite refractory materials, limestones;
- cement-based quickeners, afterburning quickeners;
- processing products for ferrous and non-ferrous metals, products resulting from accumulator batteries' processing;
- products of secondary electronic scrap, including precious metals.
