Ohio Lumex Zeeman Mercury Analyzer








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ANALYSIS TECHNIQUES
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| AAS | FTIR | LUMINESCENT AND ABSORPTION | HPLC | CE | MICROWAVE SAMPLE DIGESTION |

Types of analysis/ Description Instruments
MERCURY VAPOR CLEANING FILTER SCRUBBER

Mercury vapor is drawn through an appliance that is equipped with a pre-filter and proprietary iodine-impregnated secondary sorbent filter. As the mercury vapor contacts the iodine-impregnated sorbent, the elemental mercury is trapped chemically converted to mercury (type II) iodide (HgI2), a mercury salt.

Atomic Absorption Spectrometry (AAS)

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, RA-82 and RA-915+ Mercury Analyzer and further modifications RA-915 MiniCEM and RA-915 RP-M324 to make them state-of-the art, convenient, accurate, and extremely sensitive instruments due to the use of the Zeeman atomic absorption spectrometry using 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.

IR SPECTROMETRY

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-02 mid-IR FT and InfraLUM FT-10 near-IR FT spectrometers, featuring a state-of-the-art robust vibration- and misalignment-proof design, allow a user to conveniently perform a variety of analytical functions, such as identification of an unknown substance, qualitative and quantitative analysis of solutions, mixed substances, or of complex natural objects, detection of impurities in atmospheric air and gases, and a functional structural analysis. Using a correlation analysis, from the IR spectrum of a sample an analyst can also determine its physical and chemical properties 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, 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.

LUMINESCENT AND ABSORPTION PHOTOMETRIC ANALYSIS

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: 

  • 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); 

  • 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); 

  • 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).

HIGH PERFORMANCE LIQUID CHROMATOGRAPHY (HPLC)

Liquid chromatography is a well-established highly selective technique for analysis of complex mixtures. When using the HPLC technique for analysis of compounds with the rated low ultimate tolerable concentrations (UTC), such as biogenic amines, polyaromatic hydrocarbons, hormones, and toxins, the sensitivity is of primary importance, because the preparation of proper samples is a laborious procedure. The use of a fluorometric detector, in particular, a FLUORAT?/sup> analyzer, provides the high sensitivity to the above substances and thus substantially improves the HPLC performance. Along with some other accessories, the PYTHON pump, developed and manufactured by Lumex, being combined with a FLUORAT?/sup> analyzer, makes up a chromatographic system.

CAPILLARY ELECTROPHORESIS (CE)

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: 

  • In contrast to HPLC, no high-pressure precision pumps are needed 

  • The consumption of high-purity solvents is much lower than in HPLC

  • The absence of a solid sorbent in the capillary rules out its aging, chemical and physical destruction, and any nonspecific bonding with the sample constituents.

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

MICROWAVE SAMPLE DIGESTION TECHNIQUE

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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