Patent US4500411A successfully refreshed from Google Patents.
US4500411A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Automatically operated polarographic analyzer
Assignee: Technion Research and Development Foundation Ltd
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Filing: 1983-06-01
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Granted: 1985-02-19
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Expires: 2003-06-01
Abstract
Abstract The present invention relates to an automatic cell for polarographic analysis. According to the invention said cell comprises a vessel (14) containing a nebulizer (3) for deaerating the sample to be analyzed, the deaerated sample being accumulated into a collector (16) and conveyed to a polarographic cell (15) provided with means for the removal of the sample after its analysis. The automatic polarographic analyzer is characterized by the very short time required for its analysis.
Inventors
- 👤 Chaim N. Yarnitzky
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-09 02:40
CPC Classifications
G; G01; G01N; G01N27/00; G01N27/26; G01N27/416; G01N27/48; G01N27/28; G01N27/30; G01N27/34
Claims Analysis
Total Claims: 12
Claim 1
Independent Claim
175 words
An automatically operated polarographic analyzing system for analyzing discrete samples comprising: a vessel including in an upper portion means for deaerating each one of said samples comprising a nebulizer and a stream of inert gas; collector means for collecting successive ones of said deaerated samples and an outlet for the exit of excess substances; a polarographic cell including a dropping mercury electrode, said cell being external to said vessel and connected to said collector means by means of tubing passing through a wall of said vessel; first pump means, coupled with said polarographic cell, defining means for moving a sample from said collector means to said polarographic cell for analysis, and second pump means, coupled with said polarographic cell, defining means for removing the sample after its analysis, said removing means being disposed below said dropping mercury electrode; a platinum wire extending below the dropping mercury electrode of said polarographic cell and passing out of said polarographic cell; and an outlet, close to the bottom end of the polarographic cell, connected to a reference electrode.
Claim 2
Dependent Claim
175 words
An automatically operated polarographic analyzing system for analyzing discrete samples comprising: a vessel including in an upper portion means for deaerating each one of said samples comprising a nebulizer and a stream of inert gas; collector means for collecting successive ones of said deaerated samples and an outlet for the exit of excess substances; a polarographic cell including a dropping mercury electrode, said cell being external to said vessel and connected to said collector means by means of tubing passing through a wall of said vessel; first pump means, coupled with said polarographic cell, defining means for moving a sample from said collector means to said polarographic cell for analysis, and second pump means, coupled with said polarographic cell, defining means for removing the sample after its analysis, said removing means being disposed below said dropping mercury electrode; a platinum wire extending below the dropping mercury electrode of said polarographic cell and passing out of said polarographic cell; and an outlet, close to the bottom end of the polarographic cell, connected to a reference electrode.
Claim 3
Dependent Claim
17 words
An automatically operated polarographic analyzer according to claim 1, wherein said removing means consists of a valve.
Claim 4
Dependent Claim
16 words
An automatically operated polarographic analyzer according to claim 2, wherein said valve is a mercury valve.
Claim 5
Dependent Claim
18 words
An automatically operated polarographic analyzer according to claim 1, wherein said removing means consists of a syphon-type device.
Claim 6
Dependent Claim
20 words
An automatically operated polarographic analyzer according to claim 1, wherein said nebulizer is activated by a stream of nitrogen gas.
Claim 7
Dependent Claim
16 words
An automatically operated polarographic analyzer according to claim 1, wherein said collector has a funnel-like shape.
Claim 8
Dependent Claim
26 words
An automatically operated polarographic analyzer according to claim 6, wherein said collector is located at a distance of between 80 and 100 mm from the nebulizer.
Claim 9
Dependent Claim
20 words
An automatically operated polarographic analyzer according to claim 1, used in conjunction with an automatic scale expansion and autoranging instrument.
Claim 10
Dependent Claim
16 words
An automatically operated polarographic analyzer according to claim 1, used in conjunction with a microprocessor control.
Claim 11
Dependent Claim
148 words
An automatically operated polarographic analyzing system for analyzing discrete samples comprising: a vessel including therein means for deaerating said samples comprising a nebulizer and a stream of inert gas; collector means for collecting the deaerated sample; and an outlet for the exit of excess substances; a polarographic cell including a dropping mercury electrode, said cell being external to said vessel and connected to said collector by means of tubing passing through the wall of said vessel; means in line with said polarographic cell, for removing the sample after analysis; a connecting member between said removing means and an external pump; a connecting member between said polarographic cell and another external pump; a platinum wire extending below the dropping mercury electrode of said polarographic cell and passing out of said polarographic cell; and an outlet, close to the bottom end of the polarographic cell, connected to a reference electrode.
Claim 12
Dependent Claim
148 words
An automatically operated polarographic analyzing system for analyzing discrete samples comprising: a vessel including therein means for deaerating said samples comprising a nebulizer and a stream of inert gas; collector means for collecting the deaerated sample; and an outlet for the exit of excess substances; a polarographic cell including a dropping mercury electrode, said cell being external to said vessel and connected to said collector by means of tubing passing through the wall of said vessel; means in line with said polarographic cell, for removing the sample after analysis; a connecting member between said removing means and an external pump; a connecting member between said polarographic cell and another external pump; a platinum wire extending below the dropping mercury electrode of said polarographic cell and passing out of said polarographic cell; and an outlet, close to the bottom end of the polarographic cell, connected to a reference electrode.
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) | 1988-02-19 | 1988-08-20 | 1989-02-19 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1992-02-19 | 1992-08-20 | 1993-02-19 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 1996-02-19 | 1996-08-20 | 1997-02-19 | $7700.00 | Window Closed / Lapsed |