GB565278A - Improvements in or relating to determination of the available chlorine content, or changes in such content, of an aqueous liquid - Google Patents
Improvements in or relating to determination of the available chlorine content, or changes in such content, of an aqueous liquidInfo
- Publication number
- GB565278A GB565278A GB2006/43A GB200643A GB565278A GB 565278 A GB565278 A GB 565278A GB 2006/43 A GB2006/43 A GB 2006/43A GB 200643 A GB200643 A GB 200643A GB 565278 A GB565278 A GB 565278A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cathode
- voltage
- chlorine
- liquid
- pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- 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
- G01N27/403—Cells and electrode assemblies
- G01N27/404—Cells with anode, cathode and cell electrolyte on the same side of a permeable membrane which separates them from the sample fluid, e.g. Clark-type oxygen sensors
- G01N27/4045—Cells with anode, cathode and cell electrolyte on the same side of a permeable membrane which separates them from the sample fluid, e.g. Clark-type oxygen sensors for gases other than oxygen
Landscapes
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- Health & Medical Sciences (AREA)
- Physics & Mathematics (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Molecular Biology (AREA)
- Analytical Chemistry (AREA)
- Biochemistry (AREA)
- General Health & Medical Sciences (AREA)
- General Physics & Mathematics (AREA)
- Immunology (AREA)
- Pathology (AREA)
- Water Treatment By Electricity Or Magnetism (AREA)
Abstract
565,278. Determining physical qualities of materials. WALLACE & TIERNAN PRODUCTS, Inc. Feb. 6, 1943, No. 2006. Convention date, Feb. 7, 1942. [Class 37] To determine the available chlorine content in an aqueous liquid, the depolarization produced by the liquid upon a polarized cathode exposed thereto is detected while the cathode is maintained at a potential within the range of about - 0.075 to about - 0.2 volt, and preferably between - 0.15 and -0.1 volt, relative to a saturated calomel electrode as standard. The effect of ammonia and ammonia type compounds such as amines, amides and amido acids that may be present is thereby avoided. A system is shown arranged for the automatic control of the application of chlorine to a flowing liquid, such as water or sewage, in accordance with the residual chlorine content of the liquid after treatment. Water flows through a conduit 10 to which chlorine is subsequently added through a pipe 11 by means of a chlorinator 12, chlorine gas under pressure being contained in a cylinder 13 and fed to the chlorinator 12 through a pipe 14. In order to maintain a certain degree of proportionality between the flow of chlorine through the pipe 11 and the flow of liquid through the conduit 10, a differential converter 15 is operated by a venturi meter 16 which creates a pressure differential conveyed by pipes 17, 18 to the converter - 15: This produces a controlling vacuum which is transmitted to the chlorinator 12, for control thereof, by a pipe 19. Water from the main 10 is continuously withdrawn by a pipe 34 to a constant level box 33 and thence passed to a chamber 31 in a depolarization cell 30, an overflow 32 being provided. This liquid is in contact with a perforated cathode 36 in contact with a porous diaphragm 37 which separates the chamber 31 from an upper chamber 40. This contains a saturated solution of potassium chloride in which is an anode formed by a coil of wire 41. A polarizing voltage is applied across the electrodes 36, 41 by means of a circuit including a dry cell 50, regulating rheostat 51, milliammeter 53, and dropping resistor 52, the voltage across which is applied to the electrodes 36, 41 through a dropping resistor 55. A second circuit comprises a dry cell 60, rheostat 61; milliammeter 63, and resistor 62, across which a biassing voltage is developed. A self-balancing recording potentiometer 65 is connected across the resistors 55, 62, the voltage drops across which may be either additive or opposed. Changes'in current produced by changes in depolarization of the cathode 36 are thus converted into voltage changes and is indicated and recorded by the potentiometer 65, which is provided with contacts for controlling a reversible motor 20 controlling the chlorine feed. For measuring the cathode potentiala reference cell 70 is provided and may consist of a saturated calomel electrode, the voltage between the calomel electrode terminal 77 and the cathode 36 being measured by a potentiometer 80. Electrolysis of the water itself may be avoided by using a cathode material having a high hydrogen over - voltage, such as mercury. Specifications 548,18.6, 559,708 and 562,537 and U.S.A. Specifications 1,777,987 and 1,762,706 are referred to.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
US565278XA | 1942-02-07 | 1942-02-07 |
Publications (1)
Publication Number | Publication Date |
---|---|
GB565278A true GB565278A (en) | 1944-11-03 |
Family
ID=22004994
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB2006/43A Expired GB565278A (en) | 1942-02-07 | 1943-02-06 | Improvements in or relating to determination of the available chlorine content, or changes in such content, of an aqueous liquid |
Country Status (1)
Country | Link |
---|---|
GB (1) | GB565278A (en) |
-
1943
- 1943-02-06 GB GB2006/43A patent/GB565278A/en not_active Expired
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