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公开(公告)号：US12044622B2
公开(公告)日：2024-07-23
申请号：US17986389
申请日：2022-11-14
Applicant: Hach Company
Inventor： Amit Das
IPC: G01N21/64 , G01N21/77 , C07D311/16 , C09B57/02
CPC classification number: G01N21/643 , G01N21/77 , C07D311/16 , C09B57/02 , G01N2021/6439 , G01N2021/6443 , G01N2021/7786 , Y10T436/173845 , Y10T436/193333
Abstract: An embodiment provides a method for measuring total chlorine in a solution, including: preparing a thiocarbamate indicator; introducing the thiocarbamate indicator to a solution, wherein the solution contains an amount of monochloramine; adding an additive to the solution, wherein the additive accelerates the reaction rate between the thiocarbamate indicator and monochloramine and causes a change in fluorescence of the solution; and measuring the amount of monochloramine in the solution by measuring an intensity of the fluorescence. Other aspects are described and claimed.
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公开(公告)号：US11549888B2
公开(公告)日：2023-01-10
申请号：US16592339
申请日：2019-10-03
Applicant: Hach Company
Inventor： Amit Das
IPC: G01N21/64 , G01N21/77 , G01N33/18 , G01N31/22 , C07D311/16
Abstract: An embodiment provides a method for measuring total chlorine in a seawater sample, including: preparing a thiocarbamate-based indicator; introducing the thiocarbamate-based indicator to a seawater sample, wherein the seawater sample contains an amount of total chlorine; adding an additive to the seawater sample, wherein the additive accelerates the reaction rate between the thiocarbamate-based indicator and total chlorine and causes a change in fluorescence of the seawater sample; and measuring the amount of total chlorine in the seawater sample by measuring an intensity of the fluorescence. Other aspects are described and claimed.
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公开(公告)号：US11506605B2
公开(公告)日：2022-11-22
申请号：US16411855
申请日：2019-05-14
Applicant: Hach Company
Inventor： Amit Das
IPC: G01N21/64 , G01N21/77 , C07D311/16 , C09B57/02
Abstract: An embodiment provides a method for measuring total chlorine in a solution, including: preparing a thiocarbamate indicator; introducing the thiocarbamate indicator to a solution, wherein the solution contains an amount of monochloramine; adding an additive to the solution, wherein the additive accelerates the reaction rate between the thiocarbamate indicator and monochloramine and causes a change in fluorescence of the solution; and measuring the amount of monochloramine in the solution by measuring an intensity of the fluorescence. Other aspects are described and claimed.
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公开(公告)号：US20200378893A1
公开(公告)日：2020-12-03
申请号：US16425173
申请日：2019-05-29
Applicant: Hach Company
Inventor： Amit Das
Abstract: An embodiment provides a method for measuring sulfite in a solution, including: preparing a hemicyanine indicator; introducing the hemicyanine indicator to a solution containing an amount of sulfite, wherein the hemicyanine indicator reacts with the sulfite and causes a change in fluorescence of the solution; and measuring the amount of sulfite in the solution by measuring an intensity of the fluorescence. Other aspects are described and claimed.
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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
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.
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Patent Agency Ranking
公开(公告)号：US20210102930A1
公开(公告)日：2021-04-08
申请号：US16592339
申请日：2019-10-03
Applicant: Hach Company
Inventor： Amit Das
Abstract: An embodiment provides a method for measuring total chlorine in a seawater sample, including: preparing a thiocarbamate-based indicator; introducing the thiocarbamate-based indicator to a seawater sample, wherein the seawater sample contains an amount of total chlorine; adding an additive to the seawater sample, wherein the additive accelerates the reaction rate between the thiocarbamate-based indicator and total chlorine and causes a change in fluorescence of the seawater sample; and measuring the amount of total chlorine in the seawater sample by measuring an intensity of the fluorescence. Other aspects are described and claimed.
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7.发明申请公开(公告)号：US20250003936A1
公开(公告)日：2025-01-02
申请号：US18342216
申请日：2023-06-27
Applicant: Hach Company
Inventor： Amit Das
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 intensity of the solution; introducing an ammonium salt to the sample; and measuring the amount of ozone in the sample by measuring the change in intensity of the fluorescence.
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公开(公告)号：US11231368B2
公开(公告)日：2022-01-25
申请号：US16425173
申请日：2019-05-29
Applicant: Hach Company
Inventor： Amit Das
Abstract: An embodiment provides a method for measuring sulfite in a solution, including: preparing a hemicyanine indicator; introducing the hemicyanine indicator to a solution containing an amount of sulfite, wherein the hemicyanine indicator reacts with the sulfite and causes a change in fluorescence of the solution; and measuring the amount of sulfite in the solution by measuring an intensity of the fluorescence. Other aspects are described and claimed.
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公开(公告)号：US12216054B2
公开(公告)日：2025-02-04
申请号：US17070113
申请日：2020-10-14
Applicant: HACH COMPANY
Inventor： Amit Das
IPC: G01N21/64 , G01N21/77 , G01N31/22 , G01N33/18 , C07D311/16
Abstract: An embodiment provides a method for measuring total chlorine in a solution, including: preparing a thiocarbamate indicator; introducing the thiocarbamate indicator to a solution, wherein the solution contains an amount of monochloramine; adding an additive to the solution, wherein the additive accelerates the reaction rate between the thiocarbamate indicator and monochloramine and causes a change in fluorescence of the solution; and measuring the amount of monochloramine in the solution by measuring an intensity of the fluorescence. Other aspects are described and claimed.
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公开(公告)号：US20230375514A1
公开(公告)日：2023-11-23
申请号：US18319143
申请日：2023-05-17
Applicant: Hach Company
Inventor： Angella Nicholle Greenawalt , Amit Das
CPC classification number: G01N31/225 , G01N33/18
Abstract: An embodiment provides a method for measuring ozone in a sample, including: preparing a thiocarbamate-based indicator; introducing the thiocarbamate-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.
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