公开(公告)号：US20230072210A1

公开(公告)日：2023-03-09

申请号：US17986389

申请日：2022-11-14

Applicant: Hach Company

Inventor： Amit Das

IPC: G01N21/64 ,  G01N21/77

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.

公开(公告)号：US20220334059A1

公开(公告)日：2022-10-20

申请号：US17233942

申请日：2021-04-19

Applicant: Hach Company

Inventor： Amit Das

IPC: G01N21/64

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

公开(公告)号：US11422093B2

公开(公告)日：2022-08-23

申请号：US16433752

申请日：2019-06-06

Applicant: Hach Company

Inventor： Amit Das ,  Darren Kent MacFarland ,  Angella Nicholle Greenawalt ,  Daniel Gustav Mieritz

IPC: G01N21/64 ,  G01N33/18

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

公开(公告)号：US20210025862A1

公开(公告)日：2021-01-28

申请号：US17070113

申请日：2020-10-14

Applicant: HACH COMPANY

Inventor： Amit Das

IPC: G01N33/18 ,  G01N21/78 ,  C07D311/10 ,  C07C333/04

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.