Test-element for a mobile water analysis arrangement

• US 10,309,950 B2
• Filed: 03/02/2017
• Issued: 06/04/2019
• Est. Priority Date: 10/06/2008
• Status: Active Grant

• Current Assignee: Hach Lange GmbH (Danaher Corporation)
• Original Assignee: Hach Lange GmbH (Danaher Corporation)
• Inventors: Lundgreen, Ulrich, Farjam, Aria, Uthemann, Rolf, Mitreiter, Andreas, Huenig, Isabel, Lenhard, Markus, Froemel, Rainer, Kumpch, Hans-Joachim
• Primary Examiner(s): Siefke, Samuel P
• Application Number:
  US15/447,138
• Publication Number:
  US 20170176406A1
• Time in Patent Office: 824 Days
• CPC Class Codes: B01L 2300/0645 Electrodes
• CPC Class Codes: B01L 2300/0654 Lenses; Optical fibres
• CPC Class Codes: B01L 2300/0681 Filter
• CPC Class Codes: B01L 2300/0838 Capillaries
• CPC Class Codes: B01L 2400/0475 specific mechanical means and fluid pressure
• CPC Class Codes: B01L 3/5027 by integrated microfluidic structures, i.e. dimensions of channels and chambers are such that surface tension forces are important, e.g. lab-on-a-chip B01L3/5023 takes precedence; micromixers B01F33/30; microreactors for synthesis B01J19/0093; microcapillary devices in general B81B1/00
• CPC Class Codes: B01L 3/502715 characterised by interfacing components, e.g. fluidic, electrical, optical or mechanical interfaces
• 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: G01N 21/31 Investigating relative effect of material at wavelengths characteristic of specific elements or molecules, e.g. atomic absorption spectrometry G01N21/72 takes precedence
• CPC Class Codes: G01N 21/3151 using two sources of radiation of different wavelengths G01N21/33 - G01N21/39 take precedence
• CPC Class Codes: G01N 21/59 Transmissivity G01N21/25 takes precedence
• CPC Class Codes: G01N 21/78 producing a change of colour
• CPC Class Codes: G01N 2201/0245 with insertable-removable part
• CPC Class Codes: G01N 2201/061 Sources
• CPC Class Codes: G01N 27/30 Electrodes, e.g. test electrodes; Half-cells G01N27/414 takes precedence
• CPC Class Codes: G01N 27/4167 pH electrodes therefor G01N27/302, G01N27/36
• CPC Class Codes: G01N 27/4168 Oxidation-reduction potential, e.g. for chlorination of water water analysis G01N33/18
• CPC Class Codes: G01N 33/1886 using probes, e.g. submersible probes, buoys
• CPC Class Codes: G01N 33/1893 using flow cells

Abstract

A test element for a mobile water analyzing system includes a sample line and a key reagent disposed in the sample line. The sample line includes an inlet opening arranged at a first end, a pump port arranged at a second end of the sample line, an inlet section arranged between the inlet opening and the pump port, and a measuring section with at least one window arranged at an end of the measuring section. The inlet opening receives a water sample. The measuring section is arranged between the inlet section and the pump port and is coincident with a sample pathway.

Claims

1. A test element for a mobile water analyzing system, the test element comprising:

a test element body comprising a test element body length, a test element body width, and a test element body thickness, the test element body length being greater than the test element body width, and the test element body width being greater than the test element body thickness;

a sample line comprising;

an inlet opening disposed at a first end, the inlet opening being configured to receive a water sample,

a pump port disposed at a second end of the sample line,

an inlet section disposed between the inlet opening and the pump port, and

a measuring section comprising at least one window arranged at an end of the measuring section within the test element body thickness, the measuring section being arranged between the inlet section and the pump port and being coincident with a sample pathway,

wherein,

the measuring section is formed by a longitudinal section of the sample line which is arranged perpendicular to the test element body length and parallel to the test element body width; and

a key reagent disposed in the sample line.

2. The test element as recited in claim 1, wherein the sample line is a microfluidic sample line.

3. The test element as recited in claim 1, further comprising a bottom part and a separate cover part, the bottom part and the separate cover part being arranged so as to form the sample line therebetween.

4. The test element as recited in claim 1, further comprising at least one contact, and at least one electrode arranged in the measuring section, wherein the at least one electrode is configured to connect with an analyzer via the at least one contact and via at least one contact of a separate basic unit.

5. The test element as recited in claim 1, wherein, during a photometric measurement with a measurement beam, the measurement beam is aligned with the measuring section so that the photometric measurement occurs along the measuring section and not in a cross direction thereto.

6. The test element as recited in claim 1, further comprising a pump membrane configured to be controlled by a pump actuator.

7. The test element as recited in claim 6, wherein the pump actuator is a part of a sample pump of a separate basic unit, the sample pump being connected with the pump port.

8. The test element as recited in claim 1, wherein the test element further comprises an auxiliary reagent disposed in the sample line, the auxiliary reagent being disposed between the key reagent and the pump port.

9. The test element as recited in claim 1, wherein test element further comprises an absorption body disposed between the measuring section and the pump port.

10. The test element as recited in claim 1, wherein test element further comprises a sample filter disposed in the inlet section.

11. The test element as recited in claim 1, wherein test element further comprises a hydrophobic stopper capillary disposed in the sample line.

12. The test element as recited in claim 1, wherein the test element further comprises a dose capillary disposed in the sample line.

13. The test element as recited in claim 1, wherein test element is prefabricated.

15. The test element as recited in claim 1, wherein the key reagent disposed in the sample line is provided in a dry state.

14. A test element for a mobile water analyzing system comprising a photometer, the test element comprising:

a test element body comprising a test element body length, a test element body width, and a test element body thickness, the test element body length being greater than the test element body width, and the test element body width being greater than the test element body thickness;

a microfluidic sample line comprising;

an inlet opening disposed at a first end, the inlet opening being configured to receive a water sample,

a pump port disposed at a second end of the sample line,

an inlet section disposed between the inlet opening and the pump port, and

a measuring section formed by a longitudinal section of the microfluidic sample line, the measuring section comprising at least one window arranged at an end of the measuring section within the test element body thickness, the measuring section being arranged between the inlet section and the pump port and being coincident with a sample pathway; and

a key reagent disposed in the microfluidic sample line,

wherein,

during a photometric measurement with a measurement beam, the measurement beam is aligned with the measuring section so that the photometric measurement occurs along the measuring section and not in a cross direction thereto, and

the measuring section is formed by a longitudinal section of the sample line which is arranged perpendicular to the test element body length and parallel to the test element body width.