LEA-S500 – is a modern and powerful atomic-emission spectral instrument with multi-channel spectrum registration, combining in itself innovation technologies in the area of laser, spectral, measuring, digital equipment and software and permitting elemental (chemical) analysis of a sample in a matter of minutes. The detectable elements are from H to U, measuring range is to 100%.
Necessary weight of the analyzed material is from 50 nanograms. The time period of multi-element analysis including sample preparation is 1 – 15 minutes. 400 analyses on determination of material homogeneity take about 7 minutes.
Intuitive software of LEA-S500 guarantees operation of the instrument from the first operation. Only several hours and minimum special knowledge is needed to learn basic functions of the device.
Two-pulse nanosecond laser source of spectra excitation, due to high energy, power and temporal stability, provides a maximal reproducibility of the analysis results and low detection limits of elements and compounds. Simultaneously it provides arc and spark modes of spectra excitation. High-quality light throughput aberration-free high-resolution spectrograph provides accurate and reliable measurements. Unique detection system of short pulsed light signals provides extremely low limits of elements detection and a linearity of concentration dependencies in a wide range.
Laser spectra excitation source and detection system of LEA-S500 analyzer
Spectra excitation source – two-pulse nanosecond Nd:YAG laser
In the laser elemental analyzer LEA-S500 plasma of a sample material, arising due to the treatment of material under investigation with powerful light pulses, is used as a light source to obtain an atomic-emission spectrum.
It has been experimentally revealed, that when a sample is treated with two successive laser pulses (with time delay not exceeding the plasma lifetime) an essential growth of intensity and spectral lines stability in comparison with one-pulse excitation mode is provided. The given effect reduces substantially the lower limit of elements detection, increases measurements accuracy, extends analytical potential owing to excitation of lines with high ionization energy.
Unique multi-element spectrum detection system
Use of digital cameras with multi-element spectrum detection systems in spectral instruments is conditioned by a number of advantages before the traditional detection systems (photo-electronic multipliers, photo-plates and etc.). The main of them are: the opportunity of simultaneous detection of a wide spectrum range; high-speed performance, providing detection of spectra excited with frequency pulsed sources, what allows one to make a large number of measurements per a time unit (in our case it is 20 times per second); wide range of spectral sensitivity; low dark signals (noise); wide dynamic range. As a radiation receiver in digital cameras matrix charge-coupled devices (CCD) are used, which are referred to the type of photosensitive (photoelectric) charge-transfer devices (CTD). Quantum efficiency of modern semiconductor radiation receivers is 90% and higher.
One-pulse spectra excitation mode
Two-pulse spectra excitation mode
Spectrograph
Spectrograph performs radiation spectral analysis. This analysis is realized in optics by means of an element deviating the beams with various wavelengths to different angles.
Our innovative solutions guarantee:
- High accuracy and precision determination of elements and their compounds (oxides) in the samples.
- Low detection limit of elements (from 0.01 ppm to 1ppb).
- Analysis of various elements in any conductive, nonconductive solid (monolithic and powder) samples.
- Use of analytic lines at the optimal concentration sensitivity, free from spectral overlaps.
- Maximal efficiency of analytical light signal.
- Ease at operation and service.
- Safe operation and protection of personnel from harmful factors.
Operating and service conditions of LEA-S500 elemental analyzer
LEA-S500 operating and service conditions:
The design of laser elemental analyzer LEA-S500 provides complete and reliable protection of personnel from harmful and physically dangerous factors during operation of the instrument.
Analyzer is aimed for the use indoors at ambient temperature from + 15 up to + 27 °С and relative humidity of not more than 80%
at 25 °С, moisture condensation is not allowed. Diurnal indoors temperature difference is not more than 3 °С; maximal allowable temperature difference within 2 hours is not more than 2°С.
Presence of corrosive media and conducting and fine-dispersed dust in the operative area is not allowed.
Power supply is (220±22) V, with (50±1) or (60±1) Hz frequency.
Minimal industrial facility area for exploitation of the analyzer cannot be less than 15 m2.
The following free-space standards should be followed at the analyzer exploitation while operating the instrument:
- from back and lateral sides – not less than 1 meter;
- from front side – not less than 2 meters.