Applications in Moldova

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    Determination of the total mercury in a filtrate of wash-off samples from contaminated surfaces

    INTRODUCTION

    Quantitative determination of the total mercury content in filtrates of wash-off samples from the surfaces of walls, floors, equipment, and other facilities of m anufacturing areas is an effective method for the occupational safety monitoring.

    By Lumex Instruments Group Distributor in Kishinev, MOLDOVA.

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    Determination of serum protein fractions

    INTRODUCTION

    The method allows determination of relative amou nts of albumin and globulins in human serum using capillary electrophoresis methods.

    By Lumex Instruments Group Distributor in Kishinev, MOLDOVA.

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    Determination of proteins concentrations and their molecular weights

    INTRODUCTION

    The method enables fast separation of proteins according to their molecular weights (Mw) with subsequent protein quantification in pr otein-containing samples.

    By Lumex Instruments Group Distributor in Kishinev, MOLDOVA.

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    Determination of protein purity and heterogeneity with capillary gel electrophoresis and capillary isoelectric focusing

    INTRODUCTION

    Antibodies, protein-based therapeutics, and other recombinant proteins are final products in biotechnological and pharmaceutical industry. Determination of their purity, stability, and hetero geneity is of utmost importance since post-translational modifications as well as degradation processes can change drastically the biological activity of these proteins.

    By Lumex Instruments Group Distributor in Kishinev, MOLDOVA.

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    Determination of total petroleum hydrocarbons (TPH) in soil by fluorimetric method

    Introduction

    Total petroleum hydrocarbons (TPH) is a term used to describe a large family of several hundred chemical compounds that originally come from crude oil; the main and most specific part of these compounds are non-polar and slightly polar hydrocarbons of the aliphatic, aromatic, and alicyclic structure.

    By Lumex Instruments Group Distributor in Kishinev, MOLDOVA.

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    Determination of the mercury concentration in naphtha

    Introduction

    The mercury concentration in crude oil and petroleum products can vary in a wide range of less than 0.1 ppb to dozens ppm. Direct mercury determination in crude oil and petroleum products at the range above 5 ppb is covered by ASTM D7622-10(2015) "Standard test method for total mercury in crude oil using combustion and direct cold vapor atomic absorption method with Zeeman background correction". Mercury determination in naphtha and light petroleum products (condensate, gasoline and diesel fuel) at a level below 5 ppb is a vital problem for the oil refining and petrochemical industry. Complex organic matrix impedes conventional quantitative analysis for mercury.

    By Lumex Instruments Group Distributor in Kishinev, MOLDOVA.

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    Determination of organic acids in beverages

    The method allows determination of organic acids, in soft drinks (juices, fizz drinks) and alcoholic drinks (wines, beer). 

    The capillary electrophoresis method for evaluation of cations concentration is based on differential migration and separation of cations in electric field due to the difference in their electrophoretic mobility. Identification and quantitative determination of the analyzed cations is performed by indirect detection measuring UV absorption at 254 nm (for “CAPEL® -103RT/104T” systems) or 267 nm (for “CAPEL® -105/105M” systems) wavelength.

    The determination is not hindered by the presence of anions of ammonia, lithium, strontuim, barium, manganese, ferrum (II) in the quantities that are typical for the analyzed drinks. 

    By Lumex Instruments Group Distributor in Kishinev, MOLDOVA.

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    Monitoring of mercury in ambient air

    Mercury, being widespread in environment, has toxic effect on a human organism even at a low concentration. Therefore, quantitativ e determination of mercury in vari ous environments is one of the most important environmental monitoring problems. The use of a mercury analyzer RA-915M/RA-915+/RA- 915Light with Zeeman background correction provides di rect real-time continuous determination of mercury in air from 0.5 ng/m 3 within the overall possible range of me rcury concentration in ambient air.

    By Lumex Instruments Group Distributor in Kishinev, MOLDOVA.

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    Determination of preservatives (benzoic, sorbic acids and their salts) and sweeteners (acesulfame K, saccharine and its salts) in food products and raw materials, and dietary supplements

    Various food additives – preservatives (benzoic acid, sorbic acid, and their salts), sweeteners (Acesulfame K, saccharine and its salts) and others are widely used in food industry for the improvement of food products properties and extension of storage life. The amount of these additives in food products is regulated by technical instructions and other norms. 

    By Lumex Instruments Group Distributor in Kishinev, MOLDOVA.

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    Determination of total sulfur dioxide in wine and beer

    Method allows determination of mass concentration of total sulfur dioxide (sulfurous acid and its salts, food additives E220–E228) in wine, wine materials, beer and beer products by capillary electrophoresis (CE) using capillary electrophoresis system “CAPEL® -105M”. The mass concentration of total sulfur dioxide is regulated by normative documents to be held within 100– 400 mg/L for different types of wine and wine materials and within 20–50 mg/L for beer products. According to European and Russian regulations it is allowed not to indicate on the labels the presence of sulfur dioxide in beverages if its concentration is less than 10 mg/L. 

    By Lumex Instruments Group Distributor in Kishinev, MOLDOVA.

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    Determination of hesperidin and naringin in juices using CAPEL-105M capillary electrophoresis system

    The method is intended for determination of hesperidin and naringin using capillary electrophoresis technique in order to reveal adulteration of juices. These components are tested in citrus juices, concentrated juices, nectars, juice-containing beverages, and fruit sauces that are produced primarily from oranges, grapefruits, tangerines, lemons, and limes. 

    By Lumex Instruments Group Distributor in Kishinev, MOLDOVA.

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    Determination of bitter iso- alpha-acids and alpha- and beta-hop acids in beer

    It is important to quantify α- and β-hop acids (humulons and lupulons) as well as bitter iso- α-acids (isohumulons) on the all stages of beer production. Hop acids are the biochemical markers of a certain hop type. Bitter iso- α-acids stabilize the beer foam, suppress the growth of undesirable microorganisms and give the beer its bitter taste. 

    By Lumex Instruments Group Distributor in Kishinev, MOLDOVA.

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    Determination of Anions in Beverage

    Introduction

    The method is used for the determination of the mass concentration of chloride, sulfate, and nitrate in beverages by capillary electrophoresis. The method can be applied for all types of non-alcoholic and alcoholic beverages including sport and energetic drinks, juices, beer and beer products, wines, brandy and spirits, liquors, and vodka.

    By Lumex Instruments Group Distributor in Kishinev, MOLDOVA.

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    Mercury determination in natural, surface, sea, drinking, bottled, mineral, and waste water by cvaas

    Introduction

    Mercury determination in natural, drinking, and waste waters is one of the most popular analyses used for environment pollution and sanitary control. Background concentrations of mercury in natural water are within several ng/l. Maximum national permissible levels for mercury in water lie in the range of 0.16–6 µg/l. For example, the following limits for mercury in drinking water are set, µg/l:
    0.5 – Japan, Russia;
    1 – Argentina, Australia, Brazil, China, EC;
    2 – US EPA, US FDA;
    6 – WHO.

    By Lumex Instruments Group Distributor in Kishinev, MOLDOVA.

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    Determination of the chemical oxygen demand (COD) in water

    Introduction

    Chemical Oxygen Demand (COD) is one of the most common integral indicators of anthropogenic pollution of water bodies. COD is widely used in the analysis of natural water, to control wastewater treatment from organic various substances.

    By Lumex Instruments Group Distributor in Kishinev, MOLDOVA.

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    Phosphorimetric determination of uranium in water

    Introduction

    The presence of uranium in water causes radiological pollution as all uranium radionuclides decay by both alpha and gamma emissions. Chemical aspects of uranium toxicity include mainly nephritis and other renal diseases. Mentioned harmful features affect on humans even in low concentrations thus requiring sensitive analysis methods.

    By Lumex Instruments Group Distributor in Kishinev, MOLDOVA.

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    Determination of 4-carboxybenzaldehyde & p-toluic acid in purified terephthalic acid according to ASTM D7881 & ASTM D7882 test methods

    Introduction

    These test methods cover the determination of 4-carboxybenzaldehyde (4-CBA, 4-formylbenzoic acid) and p-toluic acid (p-TOL, 4-methylbenzoic acid) in purified terephthalic acid (PTA) by capillary electrophoresis (CE) with normal or reverse voltage mode and UV detection.

    By Lumex Instruments Group Distributor in Kishinev, MOLDOVA.

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    Direct determination of mercury content in ambient air

    Introduction

    Mercury, being widespread in environment, has toxic effect on a human organism even at a low concentration. Therefore, quantitativ e determination of mercury in vari ous environments is one of the most important environmental monitoring problems.

    By Lumex Instruments Group Distributor in Kishinev, MOLDOVA.

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    Rapid analysis of total mercury in waste waters and process waters with elevated mercury content using direct pyrolysis technique

    Introduction

    A conventional standard method of total mercury det ermination in water using atomic absorption spectrometry (AAS) involves preliminary sample digestion that ta kes from 30 minutes to 8 hours depending on the digestion conditions.

    By Lumex Instruments Group Distributor in Kishinev, MOLDOVA.

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    Determination of boron in water by fluorimetric method

    Introduction

    The method is designed to measure mass concentration of boron in samples of natural, drinking, and waste
    water by fluorimetric method using the FLUORAT®-02 analyzer.

    By Lumex Instruments Group Distributor in Kishinev, MOLDOVA.

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