WO1991005251A1 - A method for determining the content of organic pollution in a liquid and/or gaseous medium - Google Patents
A method for determining the content of organic pollution in a liquid and/or gaseous medium Download PDFInfo
- Publication number
- WO1991005251A1 WO1991005251A1 PCT/NO1990/000145 NO9000145W WO9105251A1 WO 1991005251 A1 WO1991005251 A1 WO 1991005251A1 NO 9000145 W NO9000145 W NO 9000145W WO 9105251 A1 WO9105251 A1 WO 9105251A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- liquid
- gaseous medium
- content
- determining
- medium
- Prior art date
Links
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01N—INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES
- G01N31/00—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods
- G01N31/005—Investigating or analysing non-biological materials by the use of the chemical methods specified in the subgroup; Apparatus specially adapted for such methods investigating the presence of an element by oxidation
Definitions
- the present invention relates to a method for determining the content of oxidizable organic compounds or substances which are dissolved, mixed or dispersed in a liquid and/or gaseous medium.
- One method comprises titration of the sample solution with a standard solution consisting of potassium permanganate or potassium dichromate. Disadvantages of said methods of titration are that inorganic substances are oxidized at the same time, and that said methods require a certain time and not insignificant labor at a lab.
- Another method which was recently introduced consists of making a sample the object of a combustion reaction at higher temperatures, and measuring or determining the quantity of the combustion product CO2. The quantity of CO2 will, thus, provide an expression of the quantity of organic material of the sample.
- Disadvantages of the last mentioned method are that it requires very expensive apparatus, and an al1-automatic and continuous analysis is rendered difficult by the the combustion process proper.
- the above objects are achieved by a method which is substantially characterized by the fact that a gaseous and/or liquid medium is contacted with ozone gas, and that the carbon dioxide gas thus formed is subjected to measurements and calculations, so that its content of organic material may be determined. Further characterizing features of the method will appear from the following dependent claims.
- a magnetic volumeter 2 measures the rate of liquid flow, and suitable measuring signals are transmitted to a microprocessor 4.
- a sample is taken through pipe branch 7 and magnet valve 8 to sample chamber 6.
- ozone gas is added to sample chamber 6, via a conduit 10, and a magnet valve 11, sample chamber 6 now being filled with liquid through which finely dispersed ozone gas passes.
- "Cold combustion" of organic material will consequently occur in sample chamber 6, and the formed COs gas is conducted to a C02 measuring device 3 which will, in turn, transmit suitable signals to microprocessor 5, which will process the received measuring signals and will present them to the user in a suitable manner. In this manner, e.g.
- quantities of discharged organic material per hour may be read and recorded, upon a completed analysis of a removed and isolated volume.of liquid sample the sample chamber is ventilated by the aid of a ventilating device 12, and the sample chamber 6 is emptied of sample solution through discharge conduit 13 and magnet valve 14. 5 is the output signal unit which may be provided with telefax, alarm, etc. Microprocessor 4, inter alia, controls magnet valves and, consequently, the interval for analyses.
Abstract
The content of organic pollutions of a liquid and/or gaseous medium is determined by the aid of a method consisting of contacting said medium with ozone gas, and measuring the CO2 gas which is consequently formed. The process may be fully automatized.
Description
A method'for determining the content of organic pollution in a liguid and/or gaseous medium
The present invention relates to a method for determining the content of oxidizable organic compounds or substances which are dissolved, mixed or dispersed in a liquid and/or gaseous medium.
In order to determine, e.g. the amount of chemically oxidizable organic substances in water substantially two basically different methods are used. One method comprises titration of the sample solution with a standard solution consisting of potassium permanganate or potassium dichromate. Disadvantages of said methods of titration are that inorganic substances are oxidized at the same time, and that said methods require a certain time and not insignificant labor at a lab. Another method which was recently introduced consists of making a sample the object of a combustion reaction at higher temperatures, and measuring or determining the quantity of the combustion product CO2. The quantity of CO2 will, thus, provide an expression of the quantity of organic material of the sample. Disadvantages of the last mentioned method are that it requires very expensive apparatus, and an al1-automatic and continuous analysis is rendered difficult by the the combustion process proper.
It was an object of the present invention to provide a method which eliminates the above disadvantages connected with known technology. Furthermore, it was an object to achieve a simple and dependable method which may be automatized, and which permits continuous measuring and detection of organic material, e.g. in effluent from a factory, a municipal sewer, or the like.
According to the present invention the above objects are achieved by a method which is substantially characterized by the fact that a gaseous and/or liquid medium is contacted
with ozone gas, and that the carbon dioxide gas thus formed is subjected to measurements and calculations, so that its content of organic material may be determined. Further characterizing features of the method will appear from the following dependent claims.
The method is illustrated below with reference to a drawing figure by the aid of an example of an embodiment of the method.
The liquid to be examined flows through pipeline 1. A magnetic volumeter 2 measures the rate of liquid flow, and suitable measuring signals are transmitted to a microprocessor 4. From pipeline 1 a sample is taken through pipe branch 7 and magnet valve 8 to sample chamber 6. From an ozone container 9 ozone gas is added to sample chamber 6, via a conduit 10, and a magnet valve 11, sample chamber 6 now being filled with liquid through which finely dispersed ozone gas passes. "Cold combustion" of organic material will consequently occur in sample chamber 6, and the formed COs gas is conducted to a C02 measuring device 3 which will, in turn, transmit suitable signals to microprocessor 5, which will process the received measuring signals and will present them to the user in a suitable manner. In this manner, e.g. quantities of discharged organic material per hour may be read and recorded, upon a completed analysis of a removed and isolated volume.of liquid sample the sample chamber is ventilated by the aid of a ventilating device 12, and the sample chamber 6 is emptied of sample solution through discharge conduit 13 and magnet valve 14. 5 is the output signal unit which may be provided with telefax, alarm, etc. Microprocessor 4, inter alia, controls magnet valves and, consequently, the interval for analyses.
Claims
1. A method for determining the content of organic pollutions in a liquid and/or gaseous medium, c h a r a c t e r i z e d i n that said liquid and/or gaseous medium is contacted with ozone gas, and that the carbon dioxide gas consequently formed is measured.
2. A method as stated in claim 1, c h a r a c t - e r i z e d i n that from the medium to be analyzed samples are automatically and continuously taken which samples are, likewise in an automatic and continuous manner made an object of ozone treatment and measurement of the quantity of carbon dioxide.
3. A method as stated in claim 2, c h a r a c t ¬ e r i z e d i n that a microprocessor is used, which processes the incoming data of analysis and the discharged volume of said medium, permitting the quantity of organic material being discharged during a certain period of time, e.g. 1 hour, to be recorded.
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
NO89893904A NO893904L (en) | 1989-10-02 | 1989-10-02 | PROCEDURE FOR AA DETERMINING EXTENDABLE ORGANIC COMPOUNDS IN A LIQUID AND / OR GAS MEDIUM. |
NO893904 | 1989-10-02 |
Publications (1)
Publication Number | Publication Date |
---|---|
WO1991005251A1 true WO1991005251A1 (en) | 1991-04-18 |
Family
ID=19892439
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/NO1990/000145 WO1991005251A1 (en) | 1989-10-02 | 1990-09-24 | A method for determining the content of organic pollution in a liquid and/or gaseous medium |
Country Status (2)
Country | Link |
---|---|
NO (1) | NO893904L (en) |
WO (1) | WO1991005251A1 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO2004027415A1 (en) * | 2002-08-19 | 2004-04-01 | BSH Bosch und Siemens Hausgeräte GmbH | Method for measuring the amount of organic substances in a liquid |
US6872291B2 (en) | 2001-01-09 | 2005-03-29 | Ppg Industries Ohio, Inc. | Method and device for detecting and controlling the level of biological contaminants in a coating process |
US9173394B2 (en) | 2007-09-26 | 2015-11-03 | Bayer Intellectual Property Gmbh | Active agent combinations having insecticidal and acaricidal properties |
Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
SE433539B (en) * | 1975-12-10 | 1984-05-28 | Commw Scient Ind Res Org | WATER ANALYSIS SET AND APPLIANCE |
DE2603752C2 (en) * | 1975-02-06 | 1985-01-17 | Sybron Corp., Rochester, N.Y. | Method and device for the determination of organically bound carbon |
DE3830623A1 (en) * | 1987-09-15 | 1989-05-03 | Bbc Brown Boveri & Cie | Method for the determination of the total organic carbon content in water |
-
1989
- 1989-10-02 NO NO89893904A patent/NO893904L/en unknown
-
1990
- 1990-09-24 WO PCT/NO1990/000145 patent/WO1991005251A1/en unknown
Patent Citations (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2603752C2 (en) * | 1975-02-06 | 1985-01-17 | Sybron Corp., Rochester, N.Y. | Method and device for the determination of organically bound carbon |
SE433539B (en) * | 1975-12-10 | 1984-05-28 | Commw Scient Ind Res Org | WATER ANALYSIS SET AND APPLIANCE |
DE3830623A1 (en) * | 1987-09-15 | 1989-05-03 | Bbc Brown Boveri & Cie | Method for the determination of the total organic carbon content in water |
Non-Patent Citations (1)
Title |
---|
PATENT ABSTRACTS OF JAPAN, Vol. 8, No. 159, P289; & JP,A,59 056 164, 31-03-1984, (FUJI DENKI SOUGOU KENKYUSHO K.K.). * |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US6872291B2 (en) | 2001-01-09 | 2005-03-29 | Ppg Industries Ohio, Inc. | Method and device for detecting and controlling the level of biological contaminants in a coating process |
WO2004027415A1 (en) * | 2002-08-19 | 2004-04-01 | BSH Bosch und Siemens Hausgeräte GmbH | Method for measuring the amount of organic substances in a liquid |
US9173394B2 (en) | 2007-09-26 | 2015-11-03 | Bayer Intellectual Property Gmbh | Active agent combinations having insecticidal and acaricidal properties |
Also Published As
Publication number | Publication date |
---|---|
NO893904D0 (en) | 1989-10-02 |
NO893904L (en) | 1991-04-03 |
Similar Documents
Publication | Publication Date | Title |
---|---|---|
JP2987483B2 (en) | Method and apparatus for measuring gaseous medium using chemical sensor | |
EP3814772B1 (en) | Method for online monitoring of water quality and particle sampling in a drinking water distribution network | |
AU655203B2 (en) | Flow injection analysis of total inorganic phosphate | |
US3898042A (en) | Method and apparatus for continuously determining total copper in an aqueous stream | |
WO1992003724A1 (en) | Gas analyser | |
JP2000502439A (en) | Inspection device for liquid samples | |
WO1991005251A1 (en) | A method for determining the content of organic pollution in a liquid and/or gaseous medium | |
CA2301824C (en) | Specific methanogenic activity measuring apparatus | |
US20020187558A1 (en) | Method for determining the amount of metal in water and kit therefor | |
Gellman et al. | Studies of Biochemical Oxidation by Direct Methods: I. Direct Method for Determining BOD | |
CN110658139A (en) | Permanganate index analysis system | |
US20020071786A1 (en) | Continuous emissions monitor for measuring organic constituents | |
US4165630A (en) | Continuous in-stack pollutant monitoring system | |
JPS63149562A (en) | Improved colorimetric measuring method of cyanide concentration of aqueous solution | |
JP2601735B2 (en) | Method and apparatus for measuring the amount of admixture in uncured concrete | |
van Staden | Solving the problems of sequential injection systems as process analyzers | |
US3773469A (en) | Method and apparatus for determining the amount of certain components in a substance, such as inorganic carbon and the like | |
JPH04343057A (en) | Method for determining quantity of ammonia in solution | |
CN209858557U (en) | Automatic calibrating device for ammonia nitrogen automatic monitor | |
SU1280464A1 (en) | Device for sampling fluid from pipeline | |
US4215091A (en) | Method of determining the mass of liquids | |
JPS588744B2 (en) | Ammonia nitrogen analysis method in water | |
JPH0735741A (en) | Bod measuring equipment | |
Tomei et al. | Calibration of an automatic instrument for bicarbonate monitoring | |
Walker et al. | Continuous Analysis and Control of Fluoride |
Legal Events
Date | Code | Title | Description |
---|---|---|---|
AK | Designated states |
Kind code of ref document: A1 Designated state(s): CA US |
|
AL | Designated countries for regional patents |
Kind code of ref document: A1 Designated state(s): AT BE CH DE DK ES FR GB IT LU NL SE |
|
NENP | Non-entry into the national phase |
Ref country code: CA |