total organic carbon Articles

  • Total Organic Carbon (TOC) Analysis

    What is Total Organic Carbon (TOC) Analysis? Total Organic Carbon (TOC) is the amount of carbon that is found in an organic compound. It has become an important indication of approximate levels of organic contamination and can therefore be used as a suggestion of water quality. In many cases, Total Organic Carbon analysis is used as an on-going monitor of change or lack of change in organic ...

  • Measuring total organic carbon in wastewater

    The continuous TOC analysis of industrial waste water is known to be problematic especially, when the TOC analyser is used as a spill monitor for heavily polluted waste water containing a high-load of particles. Thus, most operators require analysers that enable accurate TOC (total organic carbon) measurements. But do they really get those? Common analysers suffer from clogging and blockages due ...


    By LAR Process Analysers AG

  • Confined plasma gliding arc discharges

    A confined plasma gliding arc is produced in a reactor with two-electrodes contained within a very narrow channel and water spray injected into the discharge. The evolution of pH and conductivity and the formation of hydrogen peroxide in pure water with different carrier gases and the decolourisation and mineralisation of an organic dye were compared with results for a non-confined ...


    By Inderscience Publishers

  • Analyzing Total Organic Carbon in Sea Water

    Abstract The analysis of Total Organic Carbon (TOC) in seawater can be both challenging and expensive. The concentration of organic carbon in seawater is of considerable interest. The effect this matrix can have on TOC analyzers can lead to rapid consumable turnover, costly maintenance and repairs. Laboratories are continually looking to increase sample throughput, decrease overall cost of ...


    By Teledyne Tekmar

  • Photodegradation of Pb-3,4-dihydroxybenzoic acid complex under UV light illumination

    The degradation of 3,4-dihydroxybenzoic acid (3,4-DHBA) in the presence and absence of Pb2+ under UV illumination was studied. Addition of Pb2+ caused the formation of precipitate during photoreaction when the solution pH was higher than 6. The presence of Pb2+ remarkably inhibited the degradation of 3,4-DHBA and its photodegradation intermediates, while complexation of 3,4-DHBA and its ...


    By IWA Publishing

  • Total Organic Carbon Analysis for Purified Water and Water for Injection

    Abstract In pharmaceuticals, water, specifically Purified Water (PW) and Water for Intravenous Injection (WFI), is vital for drug preparation. Producing and ensuring the cleanliness of this water entails very strict quality control and precise analytical testing methods. The United States Pharmacopeia (USP) and Japanese Pharmacopeia (JP) have promoted Total Organic Carbon (TOC) analysis as the ...


    By Teledyne Tekmar

  • The Effects of Furnace Configuration Using The Torch High Temperature Combustion Analyzer

    Abstract In the evaluation of industrial process waters and wastewaters, of particular interest is organic carbon contamination from either microbial or synthetic derivatives, due to their possible environmental impact. High temperature combustion total organic carbon analyzers provide the most efficient way to measure organic carbon in these waters. The furnace parameters for high temperature ...


    By Teledyne Tekmar

  • TOC and TN Measurements of Seawater

    For pollution control of the ocean and in the research of the ocean environment, the measurement of total organic carbon (TOC) is regarded as an important index of organic contaminants contained in seawater. At the same time, the measurement of total nitrogen (TN), which is known to cause eutrophication, is also attracting attention for environmental pollution control and in ecological ...

  • Total Organic Carbon Content for Assessing Water Quality

    Methods for checking water quality are an incredibly important part of the many processes involved in ensuring we have access to safe drinking water. However, as contaminants can come from many different sources, finding a general solution for contaminant identification and removal can be difficult. Purification processes for water treatment include removal of undesirable chemicals, bacteria, ...

  • Ammonium adsorption by tidal flat surface sediments from the Yangtze Estuary

    Ammonium adsorption by sediments plays an important role in the cycle of nitrogen in the estuarine tidal flat ecosystem. Ammonium adsorption on tidal flat sediments from the Yangtze estuary was studied using the simulation experiment. The findings indicated that there was linear adsorption by the tidal flat sediments for the lower ammonium concentration (<10 mM) in the overlying waters. The ...


    By Springer-Verlag GmbH

  • City of Houston Total Organic Carbon - Case Study

    ABSTRACT The City of Houston, Texas has been aware of the implications that current and pending regulatory standards would have on the operation of their four surface water treatment facilities. In particular, the City has closely monitored changes in regulations related to enhanced coagulation, total organic carbon (TOC) removal, and disinfection by-products (DBP) reduction. The City has, and ...


    By TOC Systems, Inc.

  • Comparative study on electrochemical 4-chlorophenol degradation in different diaphragm systems with combined reduction and oxidation properties

    Two diaphragm electrolysis systems, two-electrode (anode–cathode) and three-electrode (cathode–anode–cathode), were compared for the electrochemical degradation of 4-chlorophenol. The performance of these systems was improved by feeding with hydrogen gas and then with air, in aid of the combined processes of reduction and oxidation. The 4-chlorophenol degradation, ...


    By IWA Publishing

  • A Guide for Analyzing Low-Level Total Organic Carbon Using a UV/ Persulfate Analyzer

    Abstract Total Organic Carbon (TOC) analysis is a fast and efficient analytical technique that can be easily implemented in pharmaceutical manufacturing for cleaning validation due to the all-inclusive nature of the test for carbon. It can be used to test for residues of previously manufactured products, cleaning detergents, solvents, by-products, and degradants. Although the current requirement ...


    By Teledyne Tekmar

  • Total Organic Carbon Content for Water Quality Checking

    Methods for water quality checking are an incredibly important part of the many processes involved in ensuring we have access to safe drinking water. However, as contaminants can come from many different sources, finding a general solution for contaminant identification and removal can be difficult. Purification processes for water treatment include removal of undesirable chemicals, bacteria, ...

  • Microwave-assisted oxidative digestion of lignin with hydrogen peroxide for TOC and color removal

    Dilute lignin solution was successfully digested into colorless and clarified liquor under microwave-assisted oxidative digestion with hydrogen peroxide. High dosage of hydrogen peroxide is needed to effectively digest lignin, but excessive hydrogen peroxide may lead to recondensation of formed fragments in digested lignin. Microwave irradiation greatly facilitates the oxidative digestion of ...


    By IWA Publishing

  • Catalysis of CuSO4 for total organic carbon detection based on supercritical water oxidation

    The catalytic effects of CuSO4 in total organic carbon (TOC) detecting processes based on supercritical water oxidation have been investigated. Using benzoic acid as a model pollutant, the presence of a CuSO4 catalyst can significantly decrease the reaction temperature and H2O2 multiple during the TOC detection processes. A better TOC conversion efficiency was obtained at a much lower ...


    By IWA Publishing

  • Photodegradation of sulfonamide antimicrobial compounds (sulfadiazine, sulfamethizole, sulfamethoxazole and sulfathiazole) in various UV/oxidant systems

    This study used Na2S2O8, NaBrO8 and H2O2 to degrade sulfadiazine (SDZ), sulfamethizole (SFZ), sulfamethoxazole (SMX) and sulfathiazole (STZ) under ultraviolet (UV) irradiation. The initial concentration of sulfonamide and oxidant in all experiments was 20 mg/L and 5 mM, respectively. The degradation rate for sulfonamides satisfies pseudo-first-order kinetics in all UV/oxidant systems. The ...


    By IWA Publishing

  • Effect of total organic carbon and aquatic humic substances on the occurrence of lead at the tap

    Homes with lead service lines (LSLs) in the City of Brandon, Manitoba, Canada, were found to exceed the provincial standard of 10 μg/L for lead in drinking water. Solids identified by X-ray diffraction of LSL scale were Pb5O8 and PbO2, indicating that lead(II) solids in the LSL scale have been oxidized to lead(IV) solids by free chlorine residuals. Natural organic matter (NOM) can reduce PbO2 ...


    By IWA Publishing

  • Measurement of TOC in High-Salt Sample

    The quantity of organic matter in seawater is important in the research and monitoring of marine pollution as an indicator of organic pollution. The salt content in seawater is typically about 3.5 %, but using the Shimadzu total organic carbon analyzer, it is possible to measure the TOC directly without dilution or other pretreatment procedures. Here, we introduce an example of measurement of ...

  • TOC Analysis for Standard Methods 5310B: High-Temperature Combustion Method

    Introduction Total Organic Carbon (TOC) is a rapid method that analyzes for organic carbon and expresses the result as the amount of carbon found. It is a non-specific method unable to distinguish between various organic species and only indicates that organic carbon compounds are present. Organic carbon analyzers operate by the determination of the amount of total carbon present in a sample ...

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