CN101815940B - 用于测定水或废水化学需氧量的方法和装置 - Google Patents

用于测定水或废水化学需氧量的方法和装置 Download PDF

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Publication number
CN101815940B
CN101815940B CN200880105285.8A CN200880105285A CN101815940B CN 101815940 B CN101815940 B CN 101815940B CN 200880105285 A CN200880105285 A CN 200880105285A CN 101815940 B CN101815940 B CN 101815940B
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water
waste water
electrode
current
measurement
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CN101815940A (zh
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沃纳·阿尔茨
沃夫冈·根特
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LAR Process Analysers AG
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LAR Process Analysers AG
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    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N27/00—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means
    • G01N27/26—Investigating or analysing materials by the use of electric, electrochemical, or magnetic means by investigating electrochemical variables; by using electrolysis or electrophoresis
    • G01N27/416—Systems
    • G01N27/42—Measuring deposition or liberation of materials from an electrolyte; Coulometry, i.e. measuring coulomb-equivalent of material in an electrolyte
    • G01N27/423—Coulometry
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
    • G01N33/00—Investigating or analysing materials by specific methods not covered by groups G01N1/00 - G01N31/00
    • G01N33/18—Water
    • G01N33/1806—Water biological or chemical oxygen demand (BOD or COD)

Abstract

本发明提供了用于测定水或废水化学需氧量的方法，其中所述测定通过溶解在水或废水样品中的物质的非特定电化学氧化来实现，其中浸入水或废水中的工作电极上流过的电流构成对所述水或废水中每单位时间内所述电极转换的材料量的测量，由此构成对所述水中含量的测量，因而，在第一测量步骤中，所述测量在与至少一个电极接触的所述水或废水运动时进行，在第二测量步骤中，所述测量在所述水或废水相对于电极基本不动时进行，且所述第一和第二步骤中的电流强度之差构成对至少一种具体元素，特别是氯的离子含量的测量。

Description

用于测定水或废水化学需氧量的方法和装置
技术领域
本发明涉及用于测定水或废水化学需氧量的方法。
背景技术
这种方法由专利EP0282441B1可知；关于电极材料、方法参数和该方法的可能应用，详见该文献。
在过去采用该方法期间，一些问题由待测水或废水中的特殊离子含量，特别是氯离子含量所引起。
发明内容
因此，本发明的目的是提供一种改进的方法，在研究中，当液体中存在特殊离子时，所述方法将特别给出更精确的结果。此外，制备了用于实施该方法的适宜的测量装置。
具体实施方式
上述目的通过具有权利要求1中所述特征的方法在其方法方案中实现，关于装置，通过具有权利要求4中所述特征的装置来实现。

Claims (6)

1.一种用于测定水或废水化学需氧量的方法，其中所述测定通过溶解在所述水或废水样品中的物质的非特定电化学氧化来实现，其中浸入所述水中的工作电极上所流过的电流构成对所述水或废水中每单位时间内所述电极转换的材料量的测量，由此构成对所述水中含量的测量；
其中，在第一测量步骤中，所述测量在与至少一个电极接触的所述水或废水运动时进行，在第二测量步骤中，所述测量在所述水或废水相对于所述电极不动时进行，且所述第一和第二步骤中的电流强度之差构成对至少一种具体元素的离子含量的测量。
2.根据权利要求1所述的方法，其中所述具体元素是氯。
3.根据权利要求1所述的方法，其中将检测到的所述电流强度之差用于评价所述方法的结果，以抵消与所述至少一种具体元素的离子有关的误导性影响。
4.根据权利要求1至3中任一项所述的方法，其中在所述第一测量步骤中，使得所述水或废水沿所述电极的表面流过。
5.一种用于测定水或废水化学需氧量的装置，其中所述测定通过溶解在所述水或废水样品中的物质的非特定电化学氧化来进行，其中浸入所述水或废水中的工作电极上所流过的电流构成对所述水或废水中每单位时间内所述电极转换的材料量的测量，由此构成对所述水中含量的测量，所述装置具有：
电极，所述电极浸入所述水或废水中，
可控装置，所述可控装置用于在至少一个所述电极区域在所述水或废水中产生运动或使运动停止，
电流测量装置，所述电流测量装置用于检测通过所述水或废水流经所述电极上的电流，
控制装置，所述控制装置用于调节第一和第二测量步骤，因而所述控制装置使在所述水或废水中产生运动或使运动停止的装置在所述第一测量步骤中保持为第一状态，在所述第二测量步骤中保持为第二状态，和
评价装置，所述评价装置包括用于检测电流差的装置，所述检测电流差的装置显示出所述第一和第二测量步骤中检测到的电流强度之差。
6.根据权利要求5所述的装置，其中所述用于产生运动的装置包括用于使电极运动的流动发生器或驱动机构。
CN200880105285.8A 2007-09-03 2008-06-23 用于测定水或废水化学需氧量的方法和装置 Expired - Fee Related CN101815940B (zh)

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DE102007041787 2007-09-03
DE102007041787.1 2007-09-03
PCT/EP2008/005058 WO2009030296A1 (de) 2007-09-03 2008-06-23 Verfahren und vorrichtung zur bestimmung des chemischen sauerstoffbedarfs von wasser oder abwasser

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EP2247277A2 (en) * 2008-01-25 2010-11-10 B & T S.r.l. Use of transesterified olive oil in the cosmetic field
CN110967383B (zh) * 2019-12-12 2022-10-04 北京沅瀚环境科技有限公司 一种测量地表水cod的电化学方法

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DE882315C (de) * 1942-10-08 1953-07-09 Siemens Ag Verfahren zur Bestimmung von chemisch oxydierbaren oder reduzierbaren Stoffen, insbesondere von Sauerstoff in Wasser, durch Depolarisationsmessung
DE3707815A1 (de) * 1987-03-09 1988-09-22 Ulrich Pilz Verfahren zur bestimmung des chemischen sauerstoffbedarfs von wasser
DE3827577A1 (de) * 1988-08-13 1990-02-15 Siepmann Friedrich W Elektrochemisches verfahren zur bestimmung oxidierbarer wasserinhaltsstoffe einer waessrigen probenfluessigkeit mittels anodischer oxidation
US5470484A (en) * 1994-01-13 1995-11-28 Buckman Laboratories International, Inc. Method and apparatus for controlling the feed of water treatment chemicals using a voltammetric sensor
JPH09504376A (ja) * 1994-08-12 1997-04-28 チュリッヒ・アクチェンゲゼルシャフト 溶質の定量方法および装置
AUPN363995A0 (en) * 1995-06-19 1995-07-13 Memtec Limited Electrochemical cell
DE19637704A1 (de) * 1996-09-04 1998-03-05 Lar Analytik Und Umweltmestech Verfahren und Vorrichtung zur Bestimmung der Oxidierbarkeit von Abwasserinhaltsstoffen
BRPI0413213A (pt) * 2003-08-21 2006-10-03 Agamatrix Inc método e aparelho para a determinação da presença de um analito selecionado numa amostra disposta numa célula eletroquìmica, método para determinar a distáncia efetiva de separação entre um primeiro eletrodo e um segundo eletrodo numa célula eletroquìmica e método para a determinação de uma propriedade eficaz de transporte de uma espécie em uma amostra lìquida disposta entre um primeiro eletrodo e um segundo eletrodo numa célula eletroquìmica

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WO2009030296A1 (de) 2009-03-12
CN101815940A (zh) 2010-08-25
KR20100087280A (ko) 2010-08-04
RU2010108927A (ru) 2011-11-27
EP2188625A1 (de) 2010-05-26

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