# US 10,309,950 B2 · Test-element for a mobile water analysis arrangement > Agents: this data is available as JSON from the patentgrep API and MCP server — see https://patentgrep.com/llms.txt - Number: US 10,309,950 B2 - Document ID: US10309950B2 - Status: Granted - Kind: B2 - Application number: 15/447,138 - Filed: 2017-03-02 - Published: 2017-06-22 - Granted: 2019-06-04 - Earliest claimed: 2008-10-06 - Assignees: Hach Lange GmbH - Applicants: Hach Lange GmbH - Inventors: Ulrich Lundgreen; Aria Farjam; Rolf Uthemann; Andreas Mitreiter; Isabel Huenig; Markus Lenhard; Rainer Froemel; Hans-Joachim Kumpch - Web page: https://patentgrep.com/patent/US10309950B2 ## CPC - G01N 33/1893: {using flow cells} - B01L 3/502715: {characterised by interfacing components, e.g. fluidic, electrical, optical or mechanical interfaces} - B01L 3/50273: {characterised by the means or forces applied to move the fluids} - 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)} - G01N 21/3151: {using two sources of radiation of different wavelengths (G01N21/33 - G01N21/39 take precedence)} - G01N 21/59: Transmissivity (G01N21/25 takes precedence) - G01N 21/78: producing a change of colour - G01N 27/30: Electrodes, e.g. test electrodes; Half-cells (G01N27/414 takes precedence) - G01N 27/4167: {pH (electrodes therefor G01N27/302, G01N27/36)} - G01N 27/4168: {Oxidation-reduction potential, e.g. for chlorination of water (water analysis G01N33/18)} - G01N 33/1886: {using probes, e.g. submersible probes, buoys} - 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} - B01L 2300/0645: Electrodes - B01L 2300/0654: Lenses; Optical fibres - B01L 2300/0681: Filter - B01L 2300/0838: Capillaries - B01L 2400/0475: specific mechanical means and fluid pressure - G01N 2201/0245: with insertable-removable part - G01N 2201/061: Sources - G01N: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES (measuring or testing apparatus or processes other than immunoassay, involving enzymes or microorganisms C12M, C12Q) - B01L: CHEMICAL OR PHYSICAL LABORATORY APPARATUS FOR GENERAL USE ## 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 ### Claim 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. ### Claim 2 (depends on 1) The test element as recited in claim 1, wherein the sample line is a microfluidic sample line. ### Claim 3 (depends on 1) 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. ### Claim 4 (depends on 1) 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. ### Claim 5 (depends on 1) 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. ### Claim 6 (depends on 1) The test element as recited in claim 1, further comprising a pump membrane configured to be controlled by a pump actuator. ### Claim 7 (depends on 6) 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. ### Claim 8 (depends on 1) 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. ### Claim 9 (depends on 1) 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. ### Claim 10 (depends on 1) The test element as recited in claim 1, wherein test element further comprises a sample filter disposed in the inlet section. ### Claim 11 (depends on 1) The test element as recited in claim 1, wherein test element further comprises a hydrophobic stopper capillary disposed in the sample line. ### Claim 12 (depends on 1) The test element as recited in claim 1, wherein the test element further comprises a dose capillary disposed in the sample line. ### Claim 13 (depends on 1) The test element as recited in claim 1, wherein test element is prefabricated. ### Claim 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. ### Claim 15 (depends on 1) The test element as recited in claim 1, wherein the key reagent disposed in the sample line is provided in a dry state.