US4895808A
Expired / Lapsed
US
⏱️ 0.0 years remaining
Method and apparatus for adsorption detection
Assignee: Romer Labs Inc
•
Filing: 1988-07-26
•
Granted: 1990-01-23
•
Expires: 2008-07-26
Abstract
Abstract A method and apparatus for adsorption and detection of adsorbents or analytes. The method and apparatus can be employed in the field for rapid adsorption of analytes and is particularly useful for detection of mycotoxins. A sample to be analyzed is prepared in solution and placed in a test tube. A tube-like adsorption column having a seal and a valve member is forcefully fed into the test tube to force solutions through the valve member into the column and through a filter and adsorbent to trap interference. The semi-purified solution may then be analyzed for the presence of analytes. The column with the purified solution may be further employed with a second smaller adsorption column similarly equipped with a seal and valve member fitting within the first column. In similar fashion the second column may be forced into the first column to expel the solution therein into the second column and through one or more selective adsorbents for different analytes such as one or more mycotixins. Detection of the adsorbed analyte may be made by shining a fluorescent or "black" light on the adsorbent which fluoresces to indicate presence of the analyte.
Inventors
- 👤 Thomas R. Romer
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-05 10:01
CPC Classifications
B; B01; B01L; B01L3/00; B01L3/50; B01L3/508; B01L3/5082; G; G01; G01N; G01N30/00; G01N30/02; G01N30/26; G01N30/38; G01N33/00; G01N33/48; G01N33/50; G01N33/52; G01N33/528; G01N33/53; G01N33/569; G01N33/56961; G01N2030/381; G01N21/00; G01N21/62; G01N21/63; G01N21/64; G01N30/62; G01N30/74; Y; Y10; Y10T; Y10T436/00; Y10T436/25; Y10T436/25375; Y10T436/255
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
96 words
A method for purification of analytes in a solution which comprises placing said solution in a test tube, inserting a pressure exerting adsorption column having a resilient seal closely engaging an inner wall of said test tube to force said solution into said column through a bottom opening in said column past a filter member and past an adsorbent packing material to adsorb interference material to provide semi-purified solution in which solid and soluble interferences are removed, withdrawing said semi-purified solution and subjecting said solution to a selective detection procedure for further analysis of analytes therein.
Claim 2
Independent Claim
96 words
A method for purification of analytes in a solution which comprises placing said solution in a test tube, inserting a pressure exerting adsorption column having a resilient seal closely engaging an inner wall of said test tube to force said solution into said column through a bottom opening in said column past a filter member and past an adsorbent packing material to adsorb interference material to provide semi-purified solution in which solid and soluble interferences are removed, withdrawing said semi-purified solution and subjecting said solution to a selective detection procedure for further analysis of analytes therein.
Claim 3
Dependent Claim
30 words
The method of claim 1 in which the detection is determined for separate analytes to indicate their presence by application of fluorescent lights of different wave lengths for separate analytes.
Claim 4
Dependent Claim
21 words
The method of claim 1 in which the selective detection is determined to indicate the presence of said analytes by chromatography.
Claim 5
Dependent Claim
21 words
The method of claim 1 in which the selective detection is determined to indicate the presence of said analytes by adsorption.
Claim 6
Dependent Claim
100 words
The method of claim 1 in which said selective detection is determined by analyzing said semi-purified solution in a test tube or the like by inserting a second pressure exerting adsorption column into said last named test tube, said second column having a resilient seal closely engaging an inner wall of said last named test tube to force said semi-purified solution into said second column through a bottom opening in said column past a selective adsorbent packing material having a selective adsorbent capacity for the analyte to be detected and testing said selective adsorbent for the presence of said analyte.
Claim 7
Independent Claim
164 words
A method for purification of analytes in a solution which comprises placing said solution in a test tube, inserting a first pressure exerting adsorption column having a resilient seal closely engaging an inner wall of said test tube to force said solution into said first column through a bottom opening in said first column past a filter member and past an adsorbent packing material to adsorb interference material to provide a semi-purified solution and withdrawing said semi-purified solution for further analysis of analytes therein, said analytes in the semi-purified solution being detected by inserting a second pressure exerting adsorption column into said first column, said second column having a resilient seal closely engaging an inner wall of said first column to force said semi-purified solution into said second column through a bottom opening in said column past a selective adsorbent packing material having a selective adsorbent capacity for the analyte to be detected and testing said selective adsorbent for the presence of said analyte.
Claim 8
Independent Claim
164 words
A method for purification of analytes in a solution which comprises placing said solution in a test tube, inserting a first pressure exerting adsorption column having a resilient seal closely engaging an inner wall of said test tube to force said solution into said first column through a bottom opening in said first column past a filter member and past an adsorbent packing material to adsorb interference material to provide a semi-purified solution and withdrawing said semi-purified solution for further analysis of analytes therein, said analytes in the semi-purified solution being detected by inserting a second pressure exerting adsorption column into said first column, said second column having a resilient seal closely engaging an inner wall of said first column to force said semi-purified solution into said second column through a bottom opening in said column past a selective adsorbent packing material having a selective adsorbent capacity for the analyte to be detected and testing said selective adsorbent for the presence of said analyte.
Claim 9
Dependent Claim
34 words
The method of claim 6 in which the selective adsorbent is one that selectively adsorbs a mycotoxin and detection is determined by shining a light thereon to indicate presence of said mycotoxin by fluorescence.
Claim 10
Dependent Claim
21 words
The method of claim 7 in which said mycotoxin is aflatoxin and the light has a wavelength of about 365 nanometers.
Claim 11
Dependent Claim
27 words
The method of claim 7 in which said mycotoxin is zearalenone and the light has a wavelength of at least one of about 365 and 224 nanometers.
Claim 12
Dependent Claim
25 words
The method of claim 6 in which a plurality of separate selective adsorbents are employed in said second column for separate adsorption of different analytes.
Claim 13
Dependent Claim
33 words
The method of claim 10 in which the selective adsorbents selectively adsorb aflatoxin and zearalenone and detection is determined by shining a light thereon to indicate presence of aflatoxin and zearalenone by fluorescence.
Claim 14
Dependent Claim
34 words
The method of claim 11 in which a light having a wavelength of about 365 nanometers is employed for aflatoxin and a light having a wavelength of about 224 nanometers is employed for zearalenone.
Claim 15
Dependent Claim
44 words
The method of claim 10 in which the separate selective adsorbents are fluorescently active and responsive to adsorption by the separate analytes to be detected and the adsorbents are subjected to fluorescent lights of different wave lengths to determine the adsorption of said analytes.
Claim 16
Dependent Claim
38 words
The method of claim 6 in which the selective adsorbent is fluorescently active and responsive to adsorption by the analyte to be detected, and the adsorbent is subjected to fluorescent light to determine the adsorption of said analyte.
Claim 17
Independent Claim
108 words
A method for purification of mycotoxin analytes in a solution containing at least one of feed grains and foodstuffs which comprises placing said solution in a test tube, inserting a pressure exerting adsorption column having a resilient seal closely engaging an inner wall of said test tube to force said solution into said column through a bottom opening in said column past a filter member and past an adsorbent packing material to adsorb interference material to provide a semi-purified solution in which solid and soluble interferences are removed, withdrawing said semi-purified solution and subjecting said solution to a selective detection procedure for further analysis of mycotoxin analytes therein.
Claim 18
Independent Claim
108 words
A method for purification of mycotoxin analytes in a solution containing at least one of feed grains and foodstuffs which comprises placing said solution in a test tube, inserting a pressure exerting adsorption column having a resilient seal closely engaging an inner wall of said test tube to force said solution into said column through a bottom opening in said column past a filter member and past an adsorbent packing material to adsorb interference material to provide a semi-purified solution in which solid and soluble interferences are removed, withdrawing said semi-purified solution and subjecting said solution to a selective detection procedure for further analysis of mycotoxin analytes therein.
Claim 19
Dependent Claim
20 words
The method of claim 15 in which the selective detection is determined to indicate presence of said mycotoxin by fluorescence.
Claim 20
Dependent Claim
21 words
The method of claim 16 in which said mycotoxin is aflatoxin and the light has a wavelength of about 365 nanometers.
Claim 21
Dependent Claim
27 words
The method of claim 16 in which said mycotoxin is zearalenone and the light has a wavelength of at least one of about 365 and 224 nanometers.
Claim 22
Dependent Claim
20 words
The method of claim 16 in which the detection is determined to indicate presence of aflotoxin and zearalenone by fluorescence.
Claim 23
Dependent Claim
34 words
The method of claim 19 in which a light having a wavelength of about 365 nanometers is employed for aflotoxin and a light having a wavelength of about 224 nanometers is employed for zearalenone.
Claim 24
Dependent Claim
22 words
The method of claim 15 in which the selective detection is determined to indicate the presence of said mycotoxin analytes by chromatography.
Claim 25
Dependent Claim
22 words
The method of claim 15 in which the selective detection is determined to indicate the presence of said mycotoxin analytes by adsorption.
References Cited (Backward Citations)
US3512940A
Cited
US3693804A
Cited
US3846077A
Cited
US3832141A
Cited
US3873449A
Cited
US3932277A
Cited
US4022576A
Cited
US4189385A
Cited
US4268270A
Cited
US4679737A
Cited
USPTO Annuity & Maintenance Windows
| Annuity Stage | Window Opens | Payment Deadline | Surcharge Period Until | Estimated Fee | Status |
|---|---|---|---|---|---|
| 3.5 Years (Year 4) | 1993-01-22 | 1993-07-24 | 1994-01-23 | $2000.00 | Window Closed / Lapsed |
| 7.5 Years (Year 8) | 1997-01-22 | 1997-07-24 | 1998-01-23 | $3760.00 | Window Closed / Lapsed |
| 11.5 Years (Year 12) | 2001-01-22 | 2001-07-24 | 2002-01-23 | $7700.00 | Window Closed / Lapsed |