US4036590A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for the automatic analysis of the concentration of an individual component of a fluid in a metal-depositing bath having several components
Assignee: Siemens AG
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Filing: 1976-05-25
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Granted: 1977-07-19
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Expires: 1996-05-25
Abstract
Abstract The invention concerns a method for the automatic analysis and determination of the amount or concentration of a specific component of a fluid in a metal-depositing bath, particularly a gold bath, wherein the fluid has several components. A quantity of bath fluid is taken from the bath in a first step. This quantity of fluid is diluted in a second step, in a third step a reaction agent and a solvent are added to a measured fractional amount of the quantity of diluted fluid during constant stirring, and, in a final step, a quantity of solvent-reaction agent mixture is conveyed to a measuring cuvette of a colorimeter and the concentration of the specific bath component is determined by means of colorimetric measurement. In addition, the invention concerns an apparatus for performing the above described method.
Inventors
- 👤 Johannes Helder
- 👤 Hubert De Steur
- 👤 Marc De Vogelaere
- 👤 Wolfgang Pernegger
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 22:03
CPC Classifications
G; G01; G01N; G01N21/00; G01N21/75; G01N21/77; G01N21/78; G01N33/00; G01N33/20; G01N33/205; Y; Y10; Y10T; Y10T436/00; Y10T436/11
Claims Analysis
Total Claims: 5
Claim 1
Independent Claim
153 words
A method for the automatic analysis and determination of the magnitude of specific components of a bath fluid having a plurality of components in a metal-depositing bath, comprising the steps of: a. pumping the bath fluid for several minutes in a circulation system located partially outside the bath; b. taking a sample quantity from the circulation system and diluting the sample quantity in at least first and second dilution operations including the step of, i. removing a diluted measured fractional quantity from the first dilution operation and again diluting that fractional quantity in the second dilution operation to create a highly diluted measured quantity; c. adding a reaction agent and solvent to the highly diluted measured quantity to create a solvent-reaction agent mixture; d. rinsing a measuring cuvette of a colorimeter with the solvent-reaction agent mixture; and e. colorimetrically measuring the solvent-reaction agent mixture to determine the magnitude of the specific bath component.
Claim 2
Independent Claim
153 words
A method for the automatic analysis and determination of the magnitude of specific components of a bath fluid having a plurality of components in a metal-depositing bath, comprising the steps of: a. pumping the bath fluid for several minutes in a circulation system located partially outside the bath; b. taking a sample quantity from the circulation system and diluting the sample quantity in at least first and second dilution operations including the step of, i. removing a diluted measured fractional quantity from the first dilution operation and again diluting that fractional quantity in the second dilution operation to create a highly diluted measured quantity; c. adding a reaction agent and solvent to the highly diluted measured quantity to create a solvent-reaction agent mixture; d. rinsing a measuring cuvette of a colorimeter with the solvent-reaction agent mixture; and e. colorimetrically measuring the solvent-reaction agent mixture to determine the magnitude of the specific bath component.
Claim 3
Dependent Claim
34 words
The method of claim 1 comprising the further step of rinsing with acetone a reaction vessel in which said solvent-reaction agent mixture is created, and also rinsing with acetone the cuvette of the colorimeter.
Claim 4
Independent Claim
138 words
A method adapted for the automatic analysis of the concentration of specific components of a fluid in a metal-depositing bath comprising the steps of: a. pumping the bath fluid for several minutes to a receiving vessel in a circulation system outside the bath; b. taking a sample quantity from the receiving vessel and diluting it in a dilution vessel to create a diluted quantity; c. taking a quantity from the diluted quantity and diluting it in a reaction vessel to create a highly diluted quantity; d. adding a reaction agent and solvent to the highly diluted quantity in the reaction vessel to create a separated mixture containing the reaction agent and solvent; e. rinsing a measuring portion of a colorimeter with said mixture; and f. colorimetrically measuring said mixture to determine the concentration of a specific bath component.
Claim 5
Independent Claim
138 words
A method adapted for the automatic analysis of the concentration of specific components of a fluid in a metal-depositing bath comprising the steps of: a. pumping the bath fluid for several minutes to a receiving vessel in a circulation system outside the bath; b. taking a sample quantity from the receiving vessel and diluting it in a dilution vessel to create a diluted quantity; c. taking a quantity from the diluted quantity and diluting it in a reaction vessel to create a highly diluted quantity; d. adding a reaction agent and solvent to the highly diluted quantity in the reaction vessel to create a separated mixture containing the reaction agent and solvent; e. rinsing a measuring portion of a colorimeter with said mixture; and f. colorimetrically measuring said mixture to determine the concentration of a specific bath component.
References Cited (Backward Citations)
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1980-07-18 | 1981-01-17 | 1981-07-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1984-07-18 | 1985-01-17 | 1985-07-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1988-07-18 | 1989-01-17 | 1989-07-19 | $7700.00 | Window Closed / Lapsed |