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| Types
of analysis/ Description |
Instruments
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| Atomic
Absorption Spectrometry (AAS) |
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The advantages of the well-known atomic absorption
(AA) spectrometry are utilized to the full extent, and
the technique itself is brought to perfection in the MGA-915 Atomic Absorption Spectrometer and RA-915+ Mercury Analyzer.These state-of-the art
instruments are convenient, accurate, and extremely sensitive
instruments due to the use of the Zeeman atomic absorption
spectrometry with high frequency modulation of light polarization
(ZAAS - HFM).
The high sensitivity and selectivity of the instruments
allow the requirements for the sample preparation and its
weight to be made much more lenient. The polarization modulation
device embodies novel proprietary design features and components.
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| IR
SPECTROMETRY |
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In modern spectroscopic instruments, the IR absorption,
transmission, or scattering spectra are detected by scanning
the phase shift between two split parts of a light beam,
which is the essence of the Fourier-transform spectrometry.
This technique provides a significant gain in photometric
accuracy and frequency precision. The InfraLUM FT-10 and FT-20 near-IR FT spectrometers, feature robust,
vibration- and misalignment-proof state-of-the-art design.
They allow for a convenient performance of a variety of
analytical functions, such as identification of an unknown
substance, qualitative and quantitative analysis of solutions,
mixtures, complex natural objects, detection of impurities
in atmospheric air and gases, and functional structural
analysis. Using correlation analysis, from the IR spectrum
of a sample an analyst can also determine physical and chemical
properties of a sample or biological characteristics, such
as sprouting ability of seeds, caloric content of food products,
grain size, density, etc. To facilitate performing the analyses,
the instruments are furnished with a variety of accessories,
dedicated SpectraLUM control system, data acquisition and
processing software package, and calibration and reference
databases. The capability of fast identification and detection
of many constituents of a complex mixture in a single run
brings the performance of these instruments on par with
a whole chemical laboratory.
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| LUMINESCENT
AND ABSORPTION PHOTOMETRIC ANALYSIS |
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For many years the photometric analysis techniques were
dominating in most of ecological, sanitary, technological,
and biochemical laboratories. However, as the requirements
for the ultimate tolerable concentrations (UTC) have become
more stringent, the luminescence techniques are being widely
used for assaying many of the substances, especially for
low detection concentration, and are preferable to the absorption
photometric techniques due to the following advantages:
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the high selectivity of the luminescence technique
allows the number of the sample preparation stages to
be reduced and the reliability of the assay to be enhanced
(Zn, Cu, Al);
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the high sensitivity of the technique allows operation
with small-volume samples, thereby speeding up sample
processing during each stage of the sample preparation,
and reducing the consumption of reagents (surfactants,
formaldehyde, Cd, Sn, Cr, Al, Cu);
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it is possible to detect the components which are
undetectable by the photometric technique because of
their low UTC (phenols, As, B, Be, Se, U, B-vitamins)
or need the use of a special-purpose IR-absorption photometer
(petroleum hydrocarbons).
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| CAPILLARY
ELECTROPHORESIS (CE) |
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Capillary electrophoresis (CE) is a new high-performance
technique for separating and assaying the constituents of
complex mixtures, which is coming to supersede liquid chromatography.
In line with this trend, LUMEX has designed and put on the
market CAPEL - series CE systems, which feature
the following advantages inherent in the CE technique:
Scope of applications
The CE technique ensures very high separation efficiency
(the number of theoretical plates amounts to 2,000,000 per
meter), therefore this technique is widely used both for
detecting substances with like structures (proteins, peptides,
amino acids, vitamins, narcotic drugs, pigments, metal ions,
and anions) and for quality control, technological inspection,
and for identification of medical preparations and food
products. CAPEL-103R/103T, CAPEL-104/104T, and CAPEL-105
Capillary Electrophoresis Systems
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| MICROWAVE
SAMPLE DIGESTION TECHNIQUE |
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The preparation of foodstuff and solid samples for assaying
heavy metals is a laborious and time-consuming stage of
the chemical analysis, which calls for much carefulness
and persistent attention of an operator. It is during this
stage when the largest errors are commonly brought about
in the results of an experiment.
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