Microflow analytical system

• US 8,431,412 B2
• Filed: 07/06/2012
• Issued: 04/30/2013
• Est. Priority Date: 05/29/2009
• Status: Active Grant

• Current Assignee: Ecolab USA Incorporated (Ecolab, Inc.)
• Original Assignee: Ecolab USA Incorporated (Ecolab, Inc.)
• Inventors: Tokhtuev, Eugene, Owen, Christopher, Pilipchenko, Anna
• Primary Examiner(s): Mui, Christine T
• Application Number:
  US13/543,596
• Publication Number:
  US 20120275259A1
• Time in Patent Office: 298 Days
• Field of Search: 436/180, 436/174, 738/630.2, 738/630.1, 738/63, 250/576, 250/573, 250/216, 422/68.1, 422/50, 435/286.5, 435/286.1, 435/283.1
• US Class Current: 436/180
• CPC Class Codes: B01L 2300/0867 Multiple inlets and one sample wells, e.g. mixing, dilution
• CPC Class Codes: B01L 2300/087 Multiple sequential chambers
• CPC Class Codes: B01L 2300/0874 Three dimensional network
• CPC Class Codes: B01L 2300/0887 Laminated structure
• CPC Class Codes: B01L 2300/1822 using Peltier elements
• CPC Class Codes: B01L 2400/0481 squeezing of channels or chambers
• CPC Class Codes: B01L 2400/0638 membrane valves, flap valves
• CPC Class Codes: B01L 3/50273 characterised by the means or forces applied to move the fluids micropumps F04B19/006, of the membrane type F04B43/043
• CPC Class Codes: B01L 3/502738 characterised by integrated valves microvalves F16K99/0001
• CPC Class Codes: F04B 19/006 Micropumps F04B43/043 and F04B43/095 take precedence
• CPC Class Codes: G01N 2021/0346 Capillary cells; Microcells
• CPC Class Codes: G01N 2035/00237 Handling microquantities of analyte, e.g. microvalves, capillary networks
• CPC Class Codes: G01N 21/0332 with temperature control control of temperature G05D23/00; cryostats F17C3/08
• CPC Class Codes: G01N 21/05 Flow-through cuvettes G01N21/09 takes precedence; handling fluid samples G01N1/10
• CPC Class Codes: G01N 35/00 Automatic analysis not limited to methods or materials provided for in any single one of groups G01N1/00 - G01N33/00; Handling materials therefor
• CPC Class Codes: G01N 35/1097 characterised by the valves valves in general F16K
• CPC Class Codes: Y10T 436/15 Inorganic acid or base [e.g. , hcl, sulfuric acid, etc. ]
• CPC Class Codes: Y10T 436/206664 Ozone or peroxide
• CPC Class Codes: Y10T 436/25 including sample preparation
• CPC Class Codes: Y10T 436/2575 Volumetric liquid transfer

Abstract

A microflow analytical system includes a laminate pump assembly connectable with one or more sources of fluid, one or more pneumatic control pumps, a mixer, and a sensor. The laminate pump assembly is adapted to deliver predetermined volumes of the fluid(s) through a plurality of flow paths which are formed within layers of the assembly. Each flow path can include an inlet valve, a pump valve, and an outlet valve each of which are controllable by the pneumatic control pumps. A series of manifolds can be formed within the layers of the pump assembly to provide for simultaneous activation of selected flow paths. Delivered fluid volumes can be mixed in the mixer which, in some embodiments, may be integral with the laminate pump assembly. The sensor can measure one or more characteristics of the mixed fluids to determine one or more properties of the fluids.

Claims

1. A system comprising:

a laminate pump assembly defining a plurality of flow paths, each flow path of the plurality of flow paths extending between an inlet passage and an outlet passage;

a plurality of fluid sources connected to the laminate pump assembly, each fluid source of the plurality of fluid sources being connected to a different one of the plurality of flow paths; and

a mixer connected to the outlet passage of each flow path of the plurality of flow paths,

wherein each flow path of the plurality of flow paths extend through an inlet valve, a pump valve, and an outlet valve, and

wherein the inlet valve, the pump valve and the outlet valve each comprise a chamber and a membrane dividing the chamber so as to define a fluid flow chamber and a control chamber, the control chamber being configured to expand in response to a control fluid entering the control chamber and collapse in response to the control fluid exiting the control chamber.

2. The system of claim 1, wherein the plurality of fluid sources comprise a water source and a use composition source.

3. The system of claim 2, wherein the use composition includes a peracid and a peroxide.

4. The system of claim 2, wherein the plurality of fluid sources further comprise a reagent source and an acid source.

5. The system of claim 1, further comprising at least one pneumatic control pump configured to introduce the control fluid into the control chamber.

6. The system of claim 5, wherein the pneumatic control pump is further configured to withdraw the control fluid from the control chamber.

7. The system of claim 5, further comprising a control manifold connecting the pneumatic control pump to a plurality of control chambers.

8. The system of claim 5, wherein the control fluid is air.

9. The system of claim 1, wherein the control chamber of the inlet valve, the pump valve, and the outlet valve of each flow path of the plurality of flow paths is independently controllable.

10. The system of claim 1, further comprising an optical sensor positioned downstream of the mixer and configured to measure an optical characteristic of a mixed fluid flowing from the mixer.

11. A method comprising:

introducing a plurality of fluids into a laminate pump assembly defining a plurality of flow paths that each extend between an inlet passage and an outlet passage, wherein each fluid of the plurality of fluids is introduced into a different one of the plurality of flow paths, and wherein each flow path of the plurality of flow paths extend through an inlet valve, a pump valve, and an outlet valve, the inlet valve, the pump valve and the outlet valve each comprising a chamber and a membrane dividing the chamber so as to define a fluid flow chamber and a control chamber;

introducing a control fluid into the control chamber of at least one of the inlet valve, the pump valve and outlet valve so as to expand the control chamber and close the fluid flow chamber;

withdrawing the control fluid from the control chamber of the at least one of the inlet valve, the pump valve and outlet valve so as to collapse the control chamber and open the fluid flow chamber; and

delivering the plurality of fluids through a mixer connected to the outlet passage of each flow path of the plurality of flow paths so as to mix the plurality of fluids.

12. The method of claim 11, wherein the plurality of fluids comprise water and a use composition.

13. The method of claim 12, wherein the use composition includes a peracid and a peroxide.

14. The method of claim 12, wherein the plurality of fluids further comprise a reagent and an acid.

15. The method of claim 11, wherein introducing the control fluid into the control chamber comprises activating a pneumatic control pump so as to introduce the control fluid into the control chamber.

16. The method of claim 15, wherein withdrawing the control fluid from the control chamber comprises activating the pneumatic control pump so as to withdraw the control fluid from the control chamber.

17. The method of claim 15, wherein the laminate pump assembly comprises a control manifold connecting the pneumatic control pump to a plurality of control chambers.

18. The method of claim 11, wherein the control fluid is air.

19. The method of claim 11, wherein the control chamber of the inlet valve, the pump valve, and the outlet valve of each flow path of the plurality of flow paths is independently controllable.

20. The method of claim 11, further comprising measuring an optical characteristic of a mixed fluid flowing from the mixer.