公开(公告)号：US20240219309A1

公开(公告)日：2024-07-04

申请号：US18090163

申请日：2022-12-28

Applicant: HACH COMPANY

Inventor： Douglas ROYER

IPC: G01N21/78 ,  G01N33/18

CPC classification number: G01N21/78 ,  G01N33/18

Abstract: A reagent for chlorine analysis includes N,N-diethyl-p-phenylenediamine (DPD), an inorganic chloride salt at a concentration of 0.5 M or more, and water. Additionally, a method for detecting chlorine in an aqueous sample includes subjecting a test sample to photometry. The test sample includes the aqueous sample; and a DPD reagent that includes DPD, an inorganic chloride salt at a concentration of 0.5 M or more, and water. The reagent and detection method can be used with minimal or no strong acids.

公开(公告)号：US12019021B2

公开(公告)日：2024-06-25

申请号：US16883595

申请日：2020-05-26

Applicant: Hach Company

Inventor： Angella Nicholle Greenawalt

IPC: G01N21/64

CPC classification number: G01N21/643 ,  G01N2021/6439

Abstract: An embodiment provides a method for measuring zinc in a solution, including: preparing an indicator solution; introducing the indicator solution to a solution, wherein the solution contains an amount of zinc and the introducing causes a change in fluorescence of the solution in response to the indicator solution reacting with the zinc; and measuring the amount of zinc in the solution by measuring a change in intensity of the fluorescence. Other aspects are described and claimed.

公开(公告)号：US20240175817A1

公开(公告)日：2024-05-30

申请号：US18060181

申请日：2022-11-30

Applicant: Hach Company

Inventor： Amit Das

IPC: G01N21/64 ,  G01N21/03 ,  G01N21/77 ,  G01N31/16

CPC classification number: G01N21/643 ,  G01N21/03 ,  G01N21/77 ,  G01N31/16 ,  G01N2021/6443 ,  G01N2021/7786

Abstract: An embodiment provides a method for measuring ozone in a sample, including: introducing an indigo-based indicator to a sample, wherein the sample contains an amount of ozone and the introducing causes a change in fluorescence of the solution; and measuring the amount of ozone in the sample by measuring the change in intensity of the fluorescence. Other aspects are described and claimed.

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

Inventor： Corey Alan Salzer ,  Russell Young

IPC: G01N27/30 ,  G01N27/333

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.

公开(公告)号：US11549884B2

公开(公告)日：2023-01-10

申请号：US17020154

申请日：2020-09-14

Applicant: Hach Company

Inventor： Angella Nicholle Greenawalt ,  Brendan Easley Young ,  Melanie Ann Roth

IPC: G01N21/31 ,  G01N1/28 ,  G01N33/18

Abstract: An embodiment provides a method for measuring zinc and copper in an aqueous sample, including: reducing an aqueous sample containing an amount of zinc and an amount of copper with a reducing agent; buffering the reduced aqueous sample; chelating the amount of copper in the buffered aqueous sample with a copper(I) chelating agent; measuring the amount of copper in the aqueous sample by measuring a first change in intensity of the absorbance of the copper chelated aqueous sample; chelating the amount of zinc in the buffered aqueous sample with a zinc(II) chelating agent; and measuring the amount of zinc in the aqueous sample by measuring a second change in intensity of the absorbance of the zinc chelated aqueous sample. Other aspects are described and claimed.

公开(公告)号：US20220397534A1

公开(公告)日：2022-12-15

申请号：US17345359

申请日：2021-06-11

Applicant: Hach Company

Inventor： Douglas F. Royer

IPC: G01N21/78 ,  G01N33/18

Abstract: An embodiment provides a method for measuring arsenic in a sample, showing marked increase in sensitivity over previous methods including: preparing a compound of metal-plated zinc and zinc; introducing the compound to an acidified sample, wherein the sample contains an amount of arsenic, wherein the compound reduces the amount of arsenic to produce arsine gas; wherein sufficient hydrogen gas is produced to purge the sample solution; wherein the arsine gas is completely purged from the sample and captured on a test pad, wherein the pad comprises mercuric bromide, wherein the capturing produces a color change of the pad; and measuring the amount of arsenic in the sample by measuring the color change of the pad. Other aspects are described and claimed.

公开(公告)号：US20220334098A1

公开(公告)日：2022-10-20

申请号：US17621024

申请日：2020-08-19

Applicant: Hach Company

Inventor： Michael Jonathan Tschampl ,  Peter Michalski ,  Reece W. Hopkins ,  Frederik Nordahl

IPC: G01N33/487 ,  B01L3/00

Abstract: The invention provides a method for selecting a color for a chemistry or instrument based upon a parameter of a test, the method including: identifying a color corresponding to a parameter of a test for the parameter; selecting, if the color corresponding to the parameter has not previously been used for another parameter, the color for designating a chemistry or an instrument as corresponding to the parameter; selecting, if the color corresponding to the parameter has previously been used for another parameter, a different color other than the color for designating a chemistry or an instrument as corresponding to the parameter, wherein the selecting a color other than the color comprises identifying a color having a measure of change in visual perception of the different color against other previously selected colors a predetermined value from the other previously selected colors; and utilizing the selected colors for parameters across both chemistries (102, 104, 105) and instruments (101, 103) that are utilized in tests for the parameters.

公开(公告)号：US11431596B1

公开(公告)日：2022-08-30

申请号：US17174945

申请日：2021-02-12

Applicant: Hach Company

Inventor： Vishnu Vardhanan Rajasekharan ,  Russell Young

IPC: H04L43/065 ,  G06Q10/00 ,  H04L41/0681 ,  G01F23/2962 ,  G01F1/05 ,  G01F15/075

Abstract: An embodiment provides a method for real-time management of device maintenance utilizing quality metrics defined based upon inputs of the device, the method including: receiving inputs corresponding to a particular device, wherein the particular device provides measurements of a parameter of a fluid; generating, from the inputs, quality metrics for and unique to the particular device; monitoring the particular device while the particular device is deployed, wherein the monitoring occurs in view of the quality metrics; and triggering, responsive to detecting information corresponding to the particular device is violating at least one of the quality metrics, a notification to a user to perform an action corresponding to the particular device.

公开(公告)号：US11268943B2

公开(公告)日：2022-03-08

申请号：US16128326

申请日：2018-09-11

Applicant: Hach Company

Inventor： Steven James Boutelle

IPC: G01N31/22 ,  G01N21/63 ,  G01N33/18 ,  G01N21/64 ,  G01N35/00

Abstract: An embodiment provides a method for measuring dissolved oxygen of an aqueous sample, including: introducing an aqueous sample into a measurement device comprising at least two dissolved oxygen sensors, wherein at least one of the at least two dissolved sensors comprises a trend sensor and at least another of the at least two dissolved sensors comprises a reference sensor; measuring a first value of dissolved oxygen using the trend sensor, wherein the trend sensor samples at a trend frequency; measuring a second value of dissolved oxygen from a reference sensor, wherein the reference sensor samples at a reference frequency, the reference frequency being less than the trend frequency; and correcting the first value of dissolved oxygen based upon the second value of dissolved oxygen. Other aspects are described and claimed.

公开(公告)号：US20210252644A1

公开(公告)日：2021-08-19

申请号：US17126730

申请日：2020-12-18

Applicant: Hach Company

Inventor： Zoë Duncan

IPC: B23K26/359 ,  G01N27/30 ,  B23K26/0622 ,  B23K26/402

Abstract: An embodiment provides a method for manufacturing a pH electrode with a carbon region, including: determining at least one pulse overlap modification for a laser pulse used when machining the carbon region; selecting a pattern for machining the carbon region; and machining a sp2 carbon region having the at least one pulse overlap modification and in the selected pattern by pulsing a laser onto a BDD electrode surface in the selected pattern with the at least one pulse overlap modification. Other aspects are described and claimed.