GB1522410A - Determination of heavy metal ion concentrations - Google Patents
Determination of heavy metal ion concentrationsInfo
- Publication number
- GB1522410A GB1522410A GB38739/76A GB3873976A GB1522410A GB 1522410 A GB1522410 A GB 1522410A GB 38739/76 A GB38739/76 A GB 38739/76A GB 3873976 A GB3873976 A GB 3873976A GB 1522410 A GB1522410 A GB 1522410A
- Authority
- GB
- United Kingdom
- Prior art keywords
- heavy metal
- electrode
- electrolyte
- liquor
- counter electrode
- 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
- G01N27/416—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
Abstract
1522410 Determining heavy metal ions electro-chemically SIEMENS AG 17 Sept 1976 [25 Sept 1975] 38739/76 Heading G1N Heavy metals in aqueous liquor are determined by conducting the liquor for a predetermined length of time and at a constant flow-rate past a solid electrode maintained at a negative direct voltage to deposit heavy metal thereon, replacing the liquor by an electrolyte and the negative voltage by a positive direct voltage and determining the charge to remove any deposited heavy metal from the electrode. The negative voltage may be - I to -4V preferably - 1À5 to -2À5V, and the predetermined length of time 1-10 minutes. The positive voltage may be 0À5 to 3V preferably 0À8 to 2V. The electrolyte is preferably sodium chloride or sodium sulphate of concentration 10<SP>-1</SP> to 10<SP>-3</SP> mol/litre and pH 1 to 7 preferably 3-4, and is preferably stationary during the dissolution. Apparatus for carrying out the determination comprises a measuring cell 24 with working electrode 25, and counter electrode 26 and gas riser pipe 29. The aqueous liquor is supplied via filter 20, and constant head device 21 and valve 22 and the electrolyte from tank 31 via valve 32. A valve is provided in the cell outlet so that the aqueous liquor can flow through the cell during the deposition period but the electrolyte does not flow during the dissolution. A control circuit for the valves and voltages and means for integrating and displaying or recording the dissolution current and generating an alarm if a predetermined heavy metal concentration is exceeded, are provided. The deposition may be conducted with the working electrode stationary or moving i.e. rotating or vibrating. The liquid in the cell may be mechanically circulated. The electrodes preferably have an area of about 20 mm<SP>2</SP> and are preferably rods and of platinum; graphite, glass-carbon and carbides being alternative materials. The counter electrode is preferably of larger area than the reference electrode. In alternative embodiments the electrodes may be coiled wires; the counter electrode a coiled wire surrounding a rod working electrode, the counter electrode a cylinder surrounding either a cylinder or a rod working electrode or they may both be cylindrical and set in the walls of a ceramic, glass or synthetic plastics tube. The method and apparatus may be used for the automatic monitoring of heavy metal pollution. The method has a detection limit of about 10<SP>-6</SP> equivalent/litre.
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE19752542863 DE2542863A1 (en) | 1975-09-25 | 1975-09-25 | METHOD AND DEVICE FOR THE ELECTROCHEMICAL DETERMINATION OF THE CONCENTRATION OF HEAVY METALS IN WATER |
Publications (1)
Publication Number | Publication Date |
---|---|
GB1522410A true GB1522410A (en) | 1978-08-23 |
Family
ID=5957443
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
GB38739/76A Expired GB1522410A (en) | 1975-09-25 | 1976-09-17 | Determination of heavy metal ion concentrations |
Country Status (7)
Country | Link |
---|---|
AT (1) | AT350511B (en) |
CH (1) | CH599550A5 (en) |
DE (1) | DE2542863A1 (en) |
FR (1) | FR2325927A1 (en) |
GB (1) | GB1522410A (en) |
IT (1) | IT1068936B (en) |
SE (1) | SE7610040L (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2117120A (en) * | 1982-03-01 | 1983-10-05 | Secr Defence | Anodic stripping voltameter |
CN102565172A (en) * | 2010-11-22 | 2012-07-11 | 株式会社堀场制作所 | Heavy metal ion measurement method and heavy metal ion measurement device |
CN109298062A (en) * | 2018-11-02 | 2019-02-01 | 山东建筑大学 | A kind of material sound state of paddling impregnates the detection device and method of water test |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE2928123C2 (en) * | 1979-07-12 | 1983-03-03 | Dornier System Gmbh, 7990 Friedrichshafen | Device for displaying the metal-specific loading of ion exchangers |
GB8411448D0 (en) * | 1984-05-04 | 1984-06-13 | Albery Wyndham John | Gas sensor |
NO873013L (en) * | 1987-04-13 | 1988-10-14 | Electrolyt Zinc Australasia | PROCEDURE AND APPARATUS FOR DETERMINING ELECTROCHEMICALLY ACTIVE COMPONENTS. |
DE4231273A1 (en) * | 1992-09-18 | 1994-03-24 | Henkel Kgaa | Bath control of copper-containing metal treatment baths |
DE4424355C2 (en) * | 1994-07-11 | 1996-07-18 | Fraunhofer Ges Forschung | Electrochemical analysis method |
DE102006005949B3 (en) * | 2006-02-09 | 2007-10-25 | Chmiel, Horst, Prof. Dr.-Ing. | Measuring electrode e.g. mercury drop electrode, for voltammetry measurement of liquids, has permeable membrane for retaining impurities of liquid on retentate side of membrane, and conductive film placed on permeate side of membrane |
-
1975
- 1975-09-25 DE DE19752542863 patent/DE2542863A1/en active Pending
-
1976
- 1976-07-06 CH CH861076A patent/CH599550A5/xx not_active IP Right Cessation
- 1976-08-03 AT AT573276A patent/AT350511B/en not_active IP Right Cessation
- 1976-09-10 SE SE7610040A patent/SE7610040L/en unknown
- 1976-09-17 GB GB38739/76A patent/GB1522410A/en not_active Expired
- 1976-09-21 IT IT27438/76A patent/IT1068936B/en active
- 1976-09-23 FR FR7628676A patent/FR2325927A1/en active Granted
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
GB2117120A (en) * | 1982-03-01 | 1983-10-05 | Secr Defence | Anodic stripping voltameter |
CN102565172A (en) * | 2010-11-22 | 2012-07-11 | 株式会社堀场制作所 | Heavy metal ion measurement method and heavy metal ion measurement device |
CN109298062A (en) * | 2018-11-02 | 2019-02-01 | 山东建筑大学 | A kind of material sound state of paddling impregnates the detection device and method of water test |
Also Published As
Publication number | Publication date |
---|---|
FR2325927B1 (en) | 1978-12-15 |
ATA573276A (en) | 1978-11-15 |
AT350511B (en) | 1979-06-11 |
IT1068936B (en) | 1985-03-21 |
DE2542863A1 (en) | 1977-03-31 |
FR2325927A1 (en) | 1977-04-22 |
CH599550A5 (en) | 1978-05-31 |
SE7610040L (en) | 1977-03-26 |
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Legal Events
Date | Code | Title | Description |
---|---|---|---|
PS | Patent sealed | ||
PCNP | Patent ceased through non-payment of renewal fee |