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公开(公告)号：US20210372924A1
公开(公告)日：2021-12-02
申请号：US16883595
申请日：2020-05-26
Applicant: Hach Company
Inventor： Angella Nicholle Greenawalt
IPC: G01N21/64
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.
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公开(公告)号：US20190317064A1
公开(公告)日：2019-10-17
申请号：US15951927
申请日：2018-04-12
Applicant: Hach Company
Inventor： Darren Kent MacFarland , Angella Nicholle Greenawalt
Abstract: An embodiment provides a method for measuring fluoride concentration in an aqueous solution, including: preparing a polyethylene glycol (PEG) monomethyl ether to produce an ester; reacting the ester in the presence of ammoniated tetrahydrofuran to produce an amino polyethylene glycol; placing, in a solution comprising a benzaldehyde species with a phenol functional group and a carboxylic acid functional group, a 2,3,3-trimethylindolenine derivative to produce a hemicyanine with a phenol functional group and a carboxylic acid functional group; combining, in a polar aprotic solvent, the hemicyanine with the phenol functional group and carboxylic acid functional group with a 1,1-carbonyldiimidazole (CDI) and adding the amino-PEG to produce a hemicyanine-PEG; and creating a fluoride sensitive hemicyanine species by reacting the hemicyanine-PEG that contains a phenol functional group with a SiR3 species. Other embodiments are described and claimed.
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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.
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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
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.
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公开(公告)号：US10890574B2
公开(公告)日：2021-01-12
申请号：US16180384
申请日：2018-11-05
Applicant: Hach Company
Inventor： Angella Nicholle Greenawalt
Abstract: An embodiment provides a method for measuring a concentration of lead(0) in an aqueous sample, including: introducing an aqueous sample to a reaction vessel; adding a copper(II) acetate material to the aqueous sample in the reaction vessel; chelating unreacted copper(II) material by introduction of an organosulfur compound to the aqueous sample in the reaction vessel; adding a colorimetric indicator to the aqueous sample in the reaction vessel; and measuring a concentration of lead(II) in the aqueous sample by measuring a colorimetric change of the aqueous sample caused by a reaction of lead(II) within the aqueous sample with the colorimetric indicator. Other aspects are described and claimed.
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Patent Agency Ranking
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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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
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.
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公开(公告)号：US20220178892A1
公开(公告)日：2022-06-09
申请号：US17598575
申请日：2020-03-28
Applicant: Hach Company
Inventor： Daniel Gustav Mieritz , Angella Nicholle Greenawalt
Abstract: An embodiment provides a method for measuring an ion component of an aqueous sample using a photoreactive species, including: generating a metal organic framework by combining, in a reactive solution, at least one organic linker and at least one metal; impregnating the metal organic framework with the photoreactive species; introducing the impregnated metal organic framework into an aqueous sample; and measuring an analyte component concentration of the aqueous sample, wherein the measuring comprises measuring a change in the aqueous sample, wherein the change is responsive to the analyte component dissolving at least one of: the at least one organic linker and the at least one metal, and releasing the photoreactive species. Other embodiments are described and claimed.
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公开(公告)号：US10317386B2
公开(公告)日：2019-06-11
申请号：US15223708
申请日：2016-07-29
Applicant: Hach Company
Inventor： Darren Kent MacFarland , Angella Nicholle Greenawalt
IPC: G01N33/00 , G01N33/18 , C07C323/20 , C07D235/08 , C07C323/33 , C08G65/40 , G01N21/29 , G01N21/25 , G01N21/27 , G01N21/31
Abstract: A method of measuring nitrate concentration in an aqueous sample includes mixing the aqueous sample with a water-soluble thioether chosen to reduce nitrate in the aqueous sample to nitrite in the presence of a water soluble catalyst, and a water soluble reagent system adapted to interact with nitrite to generate a color; measuring color generation, and correlating the color generation to nitrate concentration.
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公开(公告)号：US20180031536A1
公开(公告)日：2018-02-01
申请号：US15223708
申请日：2016-07-29
Applicant: Hach Company
Inventor： Darren Kent MacFarland , Angella Nicholle Greenawalt
IPC: G01N33/18 , C07D235/08 , C07C323/33 , G01N21/31 , G01N21/29 , G01N21/25 , G01N21/27 , C07C323/20 , C08G65/40
CPC classification number: G01N33/188 , C07C323/20 , C07C323/33 , C07C323/36 , C07D235/08 , C08G65/40 , G01N21/251 , G01N21/27 , G01N21/293 , G01N21/31 , G01N31/227
Abstract: A method of measuring nitrate concentration in an aqueous sample includes mixing the aqueous sample with a water-soluble thioether chosen to reduce nitrate in the aqueous sample to nitrite in the presence of a water soluble catalyst, and a water soluble reagent system adapted to interact with nitrite to generate a color; measuring color generation, and correlating the color generation to nitrate concentration.
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