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Oxygen Demand

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Oxygen Demand - Free Register to Access Experts & Abstracts

Isao Karube - One of the best experts on this subject based on the ideXlab platform.

  • Relationship between theoretical Oxygen Demand and photocatalytic chemical Oxygen Demand for specific classes of organic chemicals
    Analyst, 2000
    Co-Authors: Satoshi Sasaki, Kazuyoshi Yano, Kazunori Ikebukuro, Kazuhito Hashimoto, Isao Karube
    Abstract:

    The oxidation behavior of twenty organic chemicals from four different classes (sugars, benzene derivatives, alcohols and carboxyl acids) were investigated using the official chemical Oxygen Demand (COD) methods (i.e., permanganate and dichromate methods) and their oxidation levels compared with the theoretical Oxygen Demand (ThOD) values. In addition, the correlation between the official COD and ThOD values was also examined using the CODMn, Cr method and their relative merits were considered. With the same set of samples, this study also examined the relationship between ThOD values and the response values of a photocatalytic COD sensor which has been developed to overcome several of the problems associated with the official COD methods. The relationship of the response values determined by the photocatalytic COD sensor to those ThOD values was obtained: r = 0.96 for the 20 organic chemicals from each different chemical class.

  • photocatalytic sensor for chemical Oxygen Demand determination based on Oxygen electrode
    Analytical Chemistry, 2000
    Co-Authors: Satoshi Sasaki, Kazuhito Hashimoto, And Kazunori Ikebukuro, Isao Karube
    Abstract:

    The construction and performance evaluation of a novel Chemical Oxygen Demand (COD) sensor is described. The sensor measures, using an Oxygen electrode, a decrease of dissolved Oxygen of a given sample resulting from photocatalytic oxidation of the organic compounds therein. As the photocatalyst, titanium dioxide (TiO2) fine particles adsorbed on a translucent poly(tetrafluoroethylene) (PTFE) membrane was used. The Oxygen electrode with the membrane attached on its tip was used as the sensor probe. The operation characteristics of the sensor are demonstrated using an artificial wastewater and real water samples from lakes in Japan. This method is considered to be reliable, in that the observed parameter is close to the theoretical definition of chemical Oxygen Demand (COD), the amount of Oxygen consumed for oxidation of organic compounds.

Satoshi Sasaki - One of the best experts on this subject based on the ideXlab platform.

  • Relationship between theoretical Oxygen Demand and photocatalytic chemical Oxygen Demand for specific classes of organic chemicals
    Analyst, 2000
    Co-Authors: Satoshi Sasaki, Kazuyoshi Yano, Kazunori Ikebukuro, Kazuhito Hashimoto, Isao Karube
    Abstract:

    The oxidation behavior of twenty organic chemicals from four different classes (sugars, benzene derivatives, alcohols and carboxyl acids) were investigated using the official chemical Oxygen Demand (COD) methods (i.e., permanganate and dichromate methods) and their oxidation levels compared with the theoretical Oxygen Demand (ThOD) values. In addition, the correlation between the official COD and ThOD values was also examined using the CODMn, Cr method and their relative merits were considered. With the same set of samples, this study also examined the relationship between ThOD values and the response values of a photocatalytic COD sensor which has been developed to overcome several of the problems associated with the official COD methods. The relationship of the response values determined by the photocatalytic COD sensor to those ThOD values was obtained: r = 0.96 for the 20 organic chemicals from each different chemical class.

  • photocatalytic sensor for chemical Oxygen Demand determination based on Oxygen electrode
    Analytical Chemistry, 2000
    Co-Authors: Satoshi Sasaki, Kazuhito Hashimoto, And Kazunori Ikebukuro, Isao Karube
    Abstract:

    The construction and performance evaluation of a novel Chemical Oxygen Demand (COD) sensor is described. The sensor measures, using an Oxygen electrode, a decrease of dissolved Oxygen of a given sample resulting from photocatalytic oxidation of the organic compounds therein. As the photocatalyst, titanium dioxide (TiO2) fine particles adsorbed on a translucent poly(tetrafluoroethylene) (PTFE) membrane was used. The Oxygen electrode with the membrane attached on its tip was used as the sensor probe. The operation characteristics of the sensor are demonstrated using an artificial wastewater and real water samples from lakes in Japan. This method is considered to be reliable, in that the observed parameter is close to the theoretical definition of chemical Oxygen Demand (COD), the amount of Oxygen consumed for oxidation of organic compounds.

Otto S Wolfbeis - One of the best experts on this subject based on the ideXlab platform.

  • optical fiber sensor for biological Oxygen Demand
    Analytical Chemistry, 1994
    Co-Authors: Claudia Preininger, Ingo Klimant, Otto S Wolfbeis
    Abstract:

    We describe the first fiber-optic microbial sensor for determination of biochemical Oxygen Demand (BOD). The sensing membrane at the tip of the fiber consists of layers of (a) an Oxygen-sensitive fluorescent material, (b) Tricbosporon cutneum immobilized in poly(vinyl alcohol), and (c) a substrate-Dermeable polycarbonate membrane to retain the yeast cells. The layers are placed, in this order, on an optically transparent gas-impermeable polyester support. Tris(4,7-diphenyl-1,10-phenanthroline)ruthenium(II) perchlorate is used as the Oxygen indicator. Typical response times are 5-10 min, and the dynamic range is from 0 to 110 mg/L BOD when a glucose/glutamate BOD standard is used

Kazuhito Hashimoto - One of the best experts on this subject based on the ideXlab platform.

  • Relationship between theoretical Oxygen Demand and photocatalytic chemical Oxygen Demand for specific classes of organic chemicals
    Analyst, 2000
    Co-Authors: Satoshi Sasaki, Kazuyoshi Yano, Kazunori Ikebukuro, Kazuhito Hashimoto, Isao Karube
    Abstract:

    The oxidation behavior of twenty organic chemicals from four different classes (sugars, benzene derivatives, alcohols and carboxyl acids) were investigated using the official chemical Oxygen Demand (COD) methods (i.e., permanganate and dichromate methods) and their oxidation levels compared with the theoretical Oxygen Demand (ThOD) values. In addition, the correlation between the official COD and ThOD values was also examined using the CODMn, Cr method and their relative merits were considered. With the same set of samples, this study also examined the relationship between ThOD values and the response values of a photocatalytic COD sensor which has been developed to overcome several of the problems associated with the official COD methods. The relationship of the response values determined by the photocatalytic COD sensor to those ThOD values was obtained: r = 0.96 for the 20 organic chemicals from each different chemical class.

  • photocatalytic sensor for chemical Oxygen Demand determination based on Oxygen electrode
    Analytical Chemistry, 2000
    Co-Authors: Satoshi Sasaki, Kazuhito Hashimoto, And Kazunori Ikebukuro, Isao Karube
    Abstract:

    The construction and performance evaluation of a novel Chemical Oxygen Demand (COD) sensor is described. The sensor measures, using an Oxygen electrode, a decrease of dissolved Oxygen of a given sample resulting from photocatalytic oxidation of the organic compounds therein. As the photocatalyst, titanium dioxide (TiO2) fine particles adsorbed on a translucent poly(tetrafluoroethylene) (PTFE) membrane was used. The Oxygen electrode with the membrane attached on its tip was used as the sensor probe. The operation characteristics of the sensor are demonstrated using an artificial wastewater and real water samples from lakes in Japan. This method is considered to be reliable, in that the observed parameter is close to the theoretical definition of chemical Oxygen Demand (COD), the amount of Oxygen consumed for oxidation of organic compounds.

And Kazunori Ikebukuro - One of the best experts on this subject based on the ideXlab platform.

  • photocatalytic sensor for chemical Oxygen Demand determination based on Oxygen electrode
    Analytical Chemistry, 2000
    Co-Authors: Satoshi Sasaki, Kazuhito Hashimoto, And Kazunori Ikebukuro, Isao Karube
    Abstract:

    The construction and performance evaluation of a novel Chemical Oxygen Demand (COD) sensor is described. The sensor measures, using an Oxygen electrode, a decrease of dissolved Oxygen of a given sample resulting from photocatalytic oxidation of the organic compounds therein. As the photocatalyst, titanium dioxide (TiO2) fine particles adsorbed on a translucent poly(tetrafluoroethylene) (PTFE) membrane was used. The Oxygen electrode with the membrane attached on its tip was used as the sensor probe. The operation characteristics of the sensor are demonstrated using an artificial wastewater and real water samples from lakes in Japan. This method is considered to be reliable, in that the observed parameter is close to the theoretical definition of chemical Oxygen Demand (COD), the amount of Oxygen consumed for oxidation of organic compounds.