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MAES analyser
Spectra registration system – multichannel analyser of atomic-emission spectra (MAES analyser).
This device is a measuring device for the intesity of spectral lines and subsequent concentrations calculation.
It is registered in Russian state registry of measuring devices since 2001.
MAES analyser is a modern spectral lines intensities measuring device for the subsequent calculation of the concentrations of the elements being detected.
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Technical specifications TU 25-7401-11855928-01 |
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Detector type |
photodiode array |
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Working spectrum range, nm |
160 ÷ 1100 |
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Amount of measuring channels |
2580 ÷ 72000 |
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Photodiode dimensions, |
12,5 ´ 1000 |
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Output signal dynamic range |
104 |
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Exposition time, ms |
10 ÷ 10000 |
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Exposition time with digital accumulation |
not limited |
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Defective cells number out of total, %, not exceeding |
0,2 |
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Standard deviation of output signal at an exposure time of 250ms, %, |
0,03 |
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Optut signal walk at an exposure time of 250ms during a period of 1 hour, %, not exceeding |
0,5 |
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Spectral lines intensity measuring range at the single momentary spectrum aquisition, conventional scale units (%) |
0,03 ÷ 100 |
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Relative standard deviation of the spectral line intensity at an exposure time of 250ms and line's intensity more than 1%, %, not exceeding |
3 |
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Standard deviation of the spectral line intensity at an exposure time of 250ms and line's intensity less than 1%, %, not exceeding |
0,03 |
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Type of control |
computer |
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Power consumption w/o computer (220V, 50Hz), W |
100 |
MAES analyser – is the perfect tool for analytical methods development and carrying out routine analysis that combines the advantages of photographic plates and photomultipliers and devoid of their shortcomings.
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MAES main advantages |
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compared to photographic plates: |
compared to photomultipliers: |
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high quantum efficiency |
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direct photoelectric conversion of spectrum
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simultaneous recording of the working spectral range |
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wide range of spectral sensitivity |
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realtime analysis results |
no limits on choosing spectral lines |
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no manual handling errors |
reliability, operational life |
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wide dynamic range |
ability to take into account spectral line's background |
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multifunctional software |
Ability for automatic temperature shift correction of the spectrum using the reference lines |
The analyser is set in place on the photo cartridge on spectrographs or instead of photomultipliers on quantameters.
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Spectral devices specifications |
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Optical scheme of the spectral device |
Name |
reciprocal linear dispersion, nm/mm |
Working spectrum range, nm |
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Prismatic |
ИСП-28, ИСП-30 |
0,4÷30 |
210÷600 |
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Čzerny–Turner (diffraction grating: flat) |
ДФС-8
ДФС-13
PGS-2
Колибри-2
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0,3; 0,6
0,1; 0,2; 0,4
0,74
30,9; 24; 14,4; 5,3; 4,3 |
190÷1000
190÷1000
190÷1000
190÷1100;190÷940;390÷860; 440÷600; 470÷590 |
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Paschen–Runge (diffraction grating: concave) |
МФС-4,6,7,8
МФС-3,5
ДФС-10М
ДФС-36
ДФС-41
ДФС-51
ДФС-458С
ДФС-44
Гранд
Гранд-Эксперт
Экспресс
Аспект
SpectroLab
Polyvac
Atomcomp/ICAP
Baird HA12 |
0,55
0,83
0,41
0,26
0,55
0,41
0,52
0,27; 0,36
0,4
0,4
0,55
0,8
0,35
0,5
0,55
0,6 |
190÷410
190÷500
200÷700
200÷500
175÷380
170÷340
230÷350 (190÷370)*
200÷350;340÷550
190÷350; 385÷470
169÷700
190÷367; 390÷545
190÷445
170÷500
175÷450
175÷450
210÷450 |
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With crossed dispersion |
СТЭ-1 |
0,38;
0,47;
0,64 |
220÷270 (208÷272)*
252÷337 (272÷355)*
336÷450 (380÷445)* |
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* – working spectrum range with MAES |
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Each cell of MAES is based on a photodiode with high UV sensitivity up to 160nm w/o using luminophores.
Using arrays of photodiodes provides a number of significant advantages: photo-cells begin and end signal accumulation at the same time with no distortion of signal in photo-cell located next to the bright spectral lines (no blooming).
Multichip assembly contain photodiode arrays mounted on a thermally stabilized common base. Stabilization of photovoltaic parameters and decreasing sensitivity threshold of assembly cells are carried out by reducing and stabilizing their temperature using Peltier microcoolers.
due to the automatic correction of the spectrum temperature shift by means of 2 to 3 reference lines per assembly it's practically impossible that the spectral lines walk will impact the result of atomic-emission analysis .
Features
«MAES» analyser is registered in Russian state registry of measuring devices (№ 21013-11) and approved for use.
integral atomic emission spectrum analysis systems with «MAES» analyser are a measuring devices for a fractions of total mass of detected elements of substances and materials (№ 33011-11 in Russian state registry of measuring devices) and are approved for use in Russian Federation.