DETECTION OF OXIDANT IN SEAWATER
    2.
    发明申请

    公开(公告)号:US20210341418A1

    公开(公告)日:2021-11-04

    申请号:US16864675

    申请日:2020-05-01

    Applicant: Hach Company

    Abstract: An embodiment provides a method for measuring total oxidant in a seawater sample, comprising: forming a seawater solution and a formed iodine by introducing a buffer and an iodide reagent to a seawater sample, wherein the seawater sample contains an amount of oxidant; placing the seawater solution in a measurement device, wherein the measurement device comprises a boron doped diamond working electrode reacting with the seawater solution and the formed iodine, wherein an electrochemical process reduces the formed iodine to iodide; and measuring the amount of total oxidant in the seawater sample by measuring, using the measurement device, an amount of iodide in the seawater sample. Other aspects are described and claimed.

    ISOLATING INTERFERENCES IN ALKALINITY MEASUREMENT

    公开(公告)号:US20220196588A1

    公开(公告)日:2022-06-23

    申请号:US17132527

    申请日:2020-12-23

    Applicant: Hach Company

    Abstract: An embodiment provides a method for measuring a characteristic of an aqueous sample, including: introducing the aqueous sample to a titration region and a reaction region of a measurement device, wherein the titration region comprises a pH electrode and a protonator electrode contacting a first portion of an aqueous sample, wherein the reaction region comprises a counter electrode contacting a second portion of the aqueous sample; placing an electrolyte reservoir in a state of electrical continuity with the titration region and the reaction region, wherein the electrolyte reservoir comprises a reference electrode, wherein the volume of the electrolyte reservoir comprises a large volume of an electrolyte; and determining a characteristic of the aqueous sample by measuring an electrochemical characteristic between the reference electrode and at least one of: the pH electrode and the counter electrode. Other aspects are described and claimed.

    ELECTROCHEMICAL CELL STIRRING
    5.
    发明申请

    公开(公告)号:US20250116645A1

    公开(公告)日:2025-04-10

    申请号:US18983771

    申请日:2024-12-17

    Applicant: Hach Company

    Abstract: An embodiment provides a method for stirring a sample in a cell, including: providing a cell comprising a sample chamber; placing an electrode on an inner surface of the sample chamber, placing a removable stir bar in the sample chamber, the removable stir bar directly contacting and touching the electrode; and wherein the stir bar can be operated to rotate within the sample chamber upon the electrode. Other aspects are described and claimed.

    DIFFERENTIAL PROBE WITH LOW-SLOPE COMPONENT
    6.
    发明公开

    公开(公告)号:US20230213469A1

    公开(公告)日:2023-07-06

    申请号:US17569076

    申请日:2022-01-05

    Applicant: Hach Company

    CPC classification number: G01N27/302 G01N27/301 G01N27/333

    Abstract: An embodiment provides a method for measuring an analyte of a sample, including: introducing a sample to a sample region of a measurement device; the measurement device comprising: a measurement electrode and a ground electrode contacting the sample; a low-slope reference electrode in a reference electrode assembly having an electrolyte solution, wherein the electrolyte solution is in contact with the low-slope reference electrode; wherein the electrolyte solution is electrically coupled to the sample via at least one junction; and measuring a first potential between the measurement electrode and the ground electrode; measuring a second potential between the low-slope reference electrode and the ground electrode; determining an analyte in the sample by comparing the first potential and the second potential. Other aspects are described and claimed.

    Alkalinity measurement of an aqueous sample

    公开(公告)号:US10801990B2

    公开(公告)日:2020-10-13

    申请号:US15955124

    申请日:2018-04-17

    Applicant: Hach Company

    Abstract: An embodiment provides a method for compensating for inteferants in measurement of alkalinity in a reagent-less system, including: introducing an aqueous sample into a measurement device comprising one or more series of electrodes; applying an electrical signal to the aqueous sample using the one or more series of electrodes, wherein the electrical signal is selected from the group consisting of: current and voltage; identifying, during application of the electrical signal, that the electrical signal reaches an oxidation threshold and measuring, prior to reaching the oxidation threshold, a first electrical response to the electrical signal, the first electrical response attributable to interferants in the aqueous sample; identifying, during application of the electrical signal, that the electrical signal reaches an endpoint and measuring, from the oxidation threshold to the endpoint, a second electrical response to the electrical signal; and measuring an alkalinity of the aqueous sample based upon a difference between the first electrical response and the second electrical response. Other aspects are described and claimed.

    Isolating interferences in alkalinity measurement

    公开(公告)号:US11714059B2

    公开(公告)日:2023-08-01

    申请号:US17132527

    申请日:2020-12-23

    Applicant: Hach Company

    CPC classification number: G01N27/302 G01N27/301 G01N27/308

    Abstract: An embodiment provides a method for measuring a characteristic of an aqueous sample, including: introducing the aqueous sample to a titration region and a reaction region of a measurement device, wherein the titration region comprises a pH electrode and a protonator electrode contacting a first portion of an aqueous sample, wherein the reaction region comprises a counter electrode contacting a second portion of the aqueous sample; placing an electrolyte reservoir in a state of electrical continuity with the titration region and the reaction region, wherein the electrolyte reservoir comprises a reference electrode, wherein the volume of the electrolyte reservoir comprises a large volume of an electrolyte; and determining a characteristic of the aqueous sample by measuring an electrochemical characteristic between the reference electrode and at least one of: the pH electrode and the counter electrode. Other aspects are described and claimed.

    Alkalinity measurement of an aqueous sample

    公开(公告)号:US11474071B2

    公开(公告)日:2022-10-18

    申请号:US17007750

    申请日:2020-08-31

    Applicant: Hach Company

    Abstract: An embodiment provides a method for compensating for inteferants in measurement of alkalinity in a reagent-less system, including: introducing an aqueous sample into a measurement device comprising one or more series of electrodes; applying an electrical signal to the aqueous sample using the one or more series of electrodes, wherein the electrical signal is selected from the group consisting of: current and voltage; identifying, during application of the electrical signal, that the electrical signal reaches an oxidation threshold and measuring, prior to reaching the oxidation threshold, a first electrical response to the electrical signal, the first electrical response attributable to interferants in the aqueous sample; identifying, during application of the electrical signal, that the electrical signal reaches an endpoint and measuring, from the oxidation threshold to the endpoint, a second electrical response to the electrical signal; and measuring an alkalinity of the aqueous sample based upon a difference between the first electrical response and the second electrical response. Other aspects are described and claimed.

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