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    • 1. 发明申请
    • IMPROVED WATER ANALYSIS
    • 改进水分析
    • WO2008077191A1
    • 2008-07-03
    • PCT/AU2007001987
    • 2007-12-21
    • AQUA DIAGNOSTIC PTY LTDZHAO HUIJUNZHANG SHANQING
    • ZHAO HUIJUNZHANG SHANQING
    • G01N33/18G01N27/00
    • G01N33/1806
    • A method of determining chemical oxygen demand (COD) of a water sample which is useful in a probe configuration includes the steps of a) applying a constant potential bias to a photoelectrochemical cell, having a photoactive working electrode optionally a reference electrode and a counter electrode, and containing a supporting electrolyte solution; b) illuminating the working electrode with a light source and recording the background photocurrent produced at the working electrode from the supporting electrolyte solution; c) adding a water sample, to be analysed, to the photoelectrochemical cell; d) illuminating the working electrode with a light source and recording the steady state photocurrent produced with the sample; e) determining the chemical oxygen demand of the water sample using the formula (I): where d is the Nernst diffusion layer thickness, D is the diffusion coefficient, A is the electrode area, F the Faraday constant and iss the steady state photocurrent. The method can accommodate a broad range of light intensity and pH.
    • 确定在探针配置中有用的水样品的化学需氧量(COD)的方法包括以下步骤:a)对光电化学电池施加恒定电位偏压,其具有任选的参考电极和对电极的光活性工作电极 并含有支持电解质溶液; b)用光源照射工作电极,并记录在工作电极上从支持电解质溶液产生的背景光电流; c)将要分析的水样添加到光电化学电池; d)用光源照射工作电极并记录样品产生的稳态光电流; e)使用公式(I)确定水样的化学需氧量:其中d是能斯特扩散层厚度,D是扩散系数,A是电极面积,F是法拉第常数,并引发稳态光电流。 该方法可以适应宽范围的光强度和pH值。
    • 2. 发明申请
    • IMPROVED ONLINE WATER ANALYSIS
    • 改进的在线水质分析
    • WO2008077192A1
    • 2008-07-03
    • PCT/AU2007/001988
    • 2007-12-21
    • AQUA DIAGNOSTIC PTY LTDZHAO, HuijunZHANG, Shanqing
    • ZHAO, HuijunZHANG, Shanqing
    • G01N33/18G01N27/00
    • G01N33/1806
    • A method of determining chemical oxygen demand (COD) of a water sample, which is useful in an on-line configuration comprising the steps of a) applying a constant potential bias to a photoelectrochemical cell, having a photoactive working electrode, optionally a reference electrode and a counter electrode, and containing a supporting electrolyte solution; b) illuminating the working electrode with a light source and recording the background photocurrent produced at the working electrode from the supporting electrolyte solution; c) adding a water sample, to be analysed, to the photoelectrochemical cell; d) illuminating the working electrode with a light source and recording the hydro dynamic photocurrent produced under continuous flow of the water to be analysed; e) determining the chemical oxygen demand of the water sample using a number of different formulae. The applied potential is preferably from -0.4 to + O.8V more preferably about +0.3V. The method is applicable to water samples in the pH range of 2 to 10. An injection volume of 13μL is preferred. A preferred flow rate is 0.3mL/min.
    • 一种测定水样品的化学需氧量(COD)的方法,其可用于在线配置,其包括以下步骤:a)向光电化学电池施加恒定电位偏压,其具有光活性工作电极,可选地参考电极 和对电极,并含有支持电解质溶液; b)用光源照射工作电极,并记录在工作电极上从支持电解质溶液产生的背景光电流; c)将要分析的水样添加到光电化学电池; d)用光源照射工作电极并记录在待分析的水的连续流动下产生的水力动态光电流; e)使用多种不同的公式确定水样品的化学需氧量。 所施加的电位优选为-0.4至+0.8V,更优选约+ 0.3V。 该方法适用于pH范围为2〜10的水样。注射体积优选为13μL。 优选的流速为0.3mL / min。
    • 4. 发明申请
    • WATER ANALYSIS USING A PHOTOELECTROCHEMICAL METHOD
    • 使用光电化学方法进行水分析
    • WO2007016740A8
    • 2009-04-23
    • PCT/AU2006001132
    • 2006-08-10
    • AQUA DIAGNOSTIC PTY LTDZHAO HUIJUNZHANG SHANQING
    • ZHAO HUIJUNZHANG SHANQING
    • G01N27/30G01N33/18
    • G01N33/1806G01N27/305H01M14/005
    • A method of determining chemical oxygen demand in water samples containing chloride ions above 0.5mM concentration in which the samples are diluted and a known quantity of an organic substance is added to the diluted sample which is the subjected to an assay by a photoelectrochemical method using a titanium dioxide nanoparticulate semiconductor electrode and measuring the photo current produced until a stable value is reached and then using the difference between the initial and stable photocurrents as a measure of the chemical oxygen demand. An alternative method involves determining chemical oxygen demand in water samples containing chloride ions by measuring the chlorine content and measuring chemical oxygen demand by a photoelectrochemical method using a titanium dioxide nanoparticulate semiconductor electrode and adjusting the chemical oxygen demand measurement using the chlorine measurement.
    • 测定含有0.5mM浓度以上的氯离子的水样中化学需氧量的方法,其中样品被稀释,并将已知量的有机物质加入到通过光电化学方法进行测定的稀释样品中,使用 二氧化钛纳米颗粒半导体电极,并测量所产生的光电流,直到达到稳定值,然后使用初始和稳定光电流之间的差作为化学需氧量的量度。 一种替代方法包括通过使用二氧化钛纳米颗粒半导体电极的光电化学方法测量氯含量并测量化学需氧量来测定含有氯离子的水样品中的化学需氧量,并使用氯测量来调节化学需氧量测量。
    • 6. 发明申请
    • WATER ANALYSIS USING A PHOTOELECTROCHEMICAL METHOD
    • 使用光电化学方法进行水分析
    • WO2007016740A1
    • 2007-02-15
    • PCT/AU2006/001132
    • 2006-08-10
    • AQUA DIAGNOSTICS PTY. LTD.ZHAO, HuijunZHANG, Shanqing
    • ZHAO, HuijunZHANG, Shanqing
    • G01N27/30G01N33/18
    • G01N33/1806G01N27/305H01M14/005
    • A method of determining chemical oxygen demand in water samples containing chloride ions above 0.5mM concentration in which the samples are diluted and a known quantity of an organic substance is added to the diluted sample which is the subjected to an assay by a photoelectrochemical method using a titanium dioxide nanoparticulate semiconductor electrode and measuring the photo current produced until a stable value is reached and then using the difference between the initial and stable photocurrents as a measure of the chemical oxygen demand. An alternative method involves determining chemical oxygen demand in water samples containing chloride ions by measuring the chlorine content and measuring chemical oxygen demand by a photoelectrochemical method using a titanium dioxide nanoparticulate semiconductor electrode and adjusting the chemical oxygen demand measurement using the chlorine measurement.
    • 测定含有0.5mM浓度以上的氯离子的水样中化学需氧量的方法,其中样品被稀释,并将已知量的有机物质加入到通过光电化学方法进行测定的稀释样品中,使用 二氧化钛纳米颗粒半导体电极,并测量所产生的光电流,直到达到稳定值,然后使用初始和稳定光电流之间的差作为化学需氧量的量度。 一种替代方法包括通过使用二氧化钛纳米颗粒半导体电极的光电化学方法测量氯含量并测量化学需氧量来测定含有氯离子的水样品中的化学需氧量,并使用氯测量来调节化学需氧量测量。