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US4865992A
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System and method for quantitative analysis of a solution
Assignee: Hach Co
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Filing: 1986-08-28
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Granted: 1989-09-12
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Expires: 2006-08-28
Abstract
Abstract A system and method for quantitative analysis of a solution to determine the concentration of a chemical species in the solution. The system includes a reaction vessel; a source of at least one liquid reagent for reacting with the chemical species being tested for; a conduit leading from the reagent source to the reaction vessel; pneumatic pressure for forcing the reagent through the conduit; controls for controlling the amount of reagent added to the reaction vessel; and a detection device for detecting reaction between the reagent and the chemical species.
Inventors
- 👤 Clifford C. Hach
- 👤 John G. Wasson
Bibliographic Details
Application Number
—
Jurisdiction
US
Data Source
google_patents
Last Synchronized
2026-11-07 17:01
CPC Classifications
G; G01; G01N; G01N35/00; G01N21/00; G01N21/75; G01N21/77; G01N21/82; G01N21/83; G01N31/00; G01N31/16; G01N2035/00465; G01N2035/00534; Y; Y10; Y10T; Y10T436/00; Y10T436/11; Y10T436/115831; Y10T436/116664
Claims Analysis
Total Claims: 25
Claim 1
Independent Claim
172 words
A system for quantitative analysis of a solution to determine the concentration of a chemical species present in said solution, said system comprising: (a) a single reaction vessel; (b) addition means for adding said solution to said reaction vessel; (c) a source of liquid reagent, said reagent being capable of reacting with said chemical species in said solution; (d) conduit means communicating between said source of liquid reagent and said reaction vessel; wherein said conduit means includes a feed line which extends into said source of liquid reagent; (e) pneumatic pressure means comprising a source of gas at a pressure in the range of about 4 to 30 p.s.i. for applying a constant positive pneumatic pressure to said liquid reagent to force said reagent into said feed line and through said conduit means to said reaction vessel; (f) control means adapted to control the amount of said reagent added to said reaction vessel; and (g) detection means adapted to detect reaction between said reagent and said chemical species in said reaction vessel.
Claim 2
Independent Claim
172 words
A system for quantitative analysis of a solution to determine the concentration of a chemical species present in said solution, said system comprising: (a) a single reaction vessel; (b) addition means for adding said solution to said reaction vessel; (c) a source of liquid reagent, said reagent being capable of reacting with said chemical species in said solution; (d) conduit means communicating between said source of liquid reagent and said reaction vessel; wherein said conduit means includes a feed line which extends into said source of liquid reagent; (e) pneumatic pressure means comprising a source of gas at a pressure in the range of about 4 to 30 p.s.i. for applying a constant positive pneumatic pressure to said liquid reagent to force said reagent into said feed line and through said conduit means to said reaction vessel; (f) control means adapted to control the amount of said reagent added to said reaction vessel; and (g) detection means adapted to detect reaction between said reagent and said chemical species in said reaction vessel.
Claim 3
Dependent Claim
15 words
A system in accordance with claim 1, wherein said reaction vessel has a predetermined volume.
Claim 4
Dependent Claim
14 words
A system in accordance with claim 1, further comprising additional sources of additional reagents.
Claim 5
Dependent Claim
31 words
A system in accordance with claim 1, further comprising displacement means adapted to displace a predetermined volume of said reaction vessel, said displacement means being movable between first and second positions.
Claim 6
Dependent Claim
35 words
A system in accordance with claim 1, wherein said detection means comprises a light source and a photodetector, wherein said photodetector is adapted to detect light transmitted from said light source through said reaction vessel.
Claim 7
Dependent Claim
15 words
A system in accordance with claim 1, wherein said detection means comprises a pH meter.
Claim 8
Dependent Claim
14 words
A system in accordance with claim 1, wherein said detection means comprises a potentiometer.
Claim 9
Dependent Claim
28 words
A system in accordance with claim 1, wherein said control means comprises: (a) valve means in said conduit means; and (b) flow restrictor means in said conduit means.
Claim 10
Dependent Claim
24 words
A system in accordance with claim 8, wherein said flow restrictor means comprises an elongated tube having a smaller diameter than said conduit means.
Claim 11
Independent Claim
182 words
A system for quantitative analysis of a solution to determine the concentration of a chemical species present in said solution, said system comprising: (a) a single reaction vessel of predetermined volume; (b) addition means for adding said solution to said reaction vessel; (c) a source of liquid reagent, said reagent being capable of reacting with said chemical species in said solution; (d) conduit means communicating between said source of liquid reagent and said reaction vessel; wherein said conduit means includes a feed line which extends into said source of liquid reagent; (e) pneumatic pressure means comprising a source of gas at a pressure in the range of about 4 to 30 p.s.i. for applying a constant positive pneumatic pressure to said liquid reagent to force said reagent into said feed line and through said conduit means to said reaction vessel; (f) control means adapted to control the amount of said reagent means added to said reaction vessel; said control means including valve means; and (g) detection means adapted to detect reaction between said reagent and said chemical species in said reaction vessel.
Claim 12
Independent Claim
182 words
A system for quantitative analysis of a solution to determine the concentration of a chemical species present in said solution, said system comprising: (a) a single reaction vessel of predetermined volume; (b) addition means for adding said solution to said reaction vessel; (c) a source of liquid reagent, said reagent being capable of reacting with said chemical species in said solution; (d) conduit means communicating between said source of liquid reagent and said reaction vessel; wherein said conduit means includes a feed line which extends into said source of liquid reagent; (e) pneumatic pressure means comprising a source of gas at a pressure in the range of about 4 to 30 p.s.i. for applying a constant positive pneumatic pressure to said liquid reagent to force said reagent into said feed line and through said conduit means to said reaction vessel; (f) control means adapted to control the amount of said reagent means added to said reaction vessel; said control means including valve means; and (g) detection means adapted to detect reaction between said reagent and said chemical species in said reaction vessel.
Claim 13
Dependent Claim
19 words
A system in accordance with claim 10, wherein said liquid reagent means comprises a plurality of separate reagent solutions.
Claim 14
Dependent Claim
20 words
A system in accordance with claim 10, wherein said control means further comprises flow restrictor means in said conduit means.
Claim 15
Dependent Claim
35 words
A system in accordance with claim 10, wherein further comprising displacement means adapted to displace a predetermined fraction of the volume of said reaction vessel, said displacement means being movable between first and second positions.
Claim 16
Dependent Claim
35 words
A system in accordance with claim 10, wherein said detection means comprises a light source and a photodetector, wherein said photodetector is adapted to detect light transmitted from said light source through said reaction vessel.
Claim 17
Dependent Claim
15 words
A system in accordance with claim 10, wherein said detection means comprises a pH meter.
Claim 18
Dependent Claim
14 words
A system in accordance with claim 10, wherein said detection means comprises a potentiometer.
Claim 19
Independent Claim
165 words
A method for quantitatively determining the concentration of a chemical species in a solution, said method comprising the steps of: (a) adding a predetermined volume of said solution to a reaction vessel; (b) providing a source of reagent which is capable of reacting with said chemical species in said solution; (c) providing conduit means which communicates between said source of liquid reagent and said reaction vessel; wherein said conduit means includes a feed line which extends into said source of liquid reagent; (d) forcing said reagent through said conduit means to said reaction vessel by means of pneumatic pressure comprising a source of gas at a pressure in the range of about 4 to 30 p.s.i. which applies a constant positive pneumatic pressure to said liquid reagent to force said reagent into said feed line and through said conduit means; (e) controlling the amount of said liquid reagent added to said reaction vessel; and (f) detecting the reaction between said reagent and said chemical species.
Claim 20
Independent Claim
165 words
A method for quantitatively determining the concentration of a chemical species in a solution, said method comprising the steps of: (a) adding a predetermined volume of said solution to a reaction vessel; (b) providing a source of reagent which is capable of reacting with said chemical species in said solution; (c) providing conduit means which communicates between said source of liquid reagent and said reaction vessel; wherein said conduit means includes a feed line which extends into said source of liquid reagent; (d) forcing said reagent through said conduit means to said reaction vessel by means of pneumatic pressure comprising a source of gas at a pressure in the range of about 4 to 30 p.s.i. which applies a constant positive pneumatic pressure to said liquid reagent to force said reagent into said feed line and through said conduit means; (e) controlling the amount of said liquid reagent added to said reaction vessel; and (f) detecting the reaction between said reagent and said chemical species.
Claim 21
Dependent Claim
48 words
A method in accordance with claim 17, wherein a plurality of reagents are provided, wherein separate conduit means communicate between each said reagent and said reaction vessel, and wherein each said reagent is forced through a respective conduit means to said reaction vessel by means of pneumatic pressure.
Claim 22
Dependent Claim
13 words
A method in accordance with claim 17, wherein said reaction is detected colorimetrically.
Claim 23
Dependent Claim
18 words
A method in accordance with claim 17, wherein said reaction is detected by means of a pH meter.
Claim 24
Dependent Claim
17 words
A method in accordance with claim 17, wherein said reaction is detected by means of a potentiometer.
Claim 25
Dependent Claim
18 words
A method in accordance with claim 17, wherein said reaction is detected by means of a conductivity meter.
References Cited (Backward Citations)
US1498682A
Cited
US2992077A
Cited
US3019091A
Cited
US3769178A
Cited
US4231990A
Cited
US4199323A
Cited
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