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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：US20210018442A1
公开(公告)日：2021-01-21
申请号：US16512054
申请日：2019-07-15
Applicant: Hach Company
Inventor： Darren Kent MacFarland , Rachel Nicole Seals
IPC: G01N21/76
Abstract: An embodiment provides a method for measuring amines in a solution, including: preparing an indicator-metal complex, wherein the indicator-metal complex comprises an indicator and a metal; introducing the indicator-metal complex to a solution, wherein the solution contains an amount of amine, wherein the amine activates the indicator-metal complex causing a change in fluorescence intensity of the indicator-metal complex; and measuring the amount of amine in the solution by measuring the change in fluorescence intensity of the indicator-metal complex. Other aspects are described and claimed.
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公开(公告)号：US20180031535A1
公开(公告)日：2018-02-01
申请号：US15223781
申请日：2016-07-29
Applicant: Hach Company
Inventor： Darren Kent MacFarland , Brendan Easley Young
IPC: G01N33/18 , B01J31/24 , C07C323/66 , G01N31/22 , G01N21/78 , C07D311/82
CPC classification number: G01N33/182 , B01J31/1875 , B01J31/2404 , B01J31/28 , B01J31/30 , B01J2231/70 , B01J2531/64 , B01J2540/32 , C07C323/66 , C07C2603/50 , C07D311/82 , G01N21/78 , G01N31/227 , Y10T436/173076
Abstract: A method of measuring nitrate concentration in an aqueous sample include mixing the aqueous sample with a water-soluble thioether compound including a chromophore group in the presence of a water soluble catalyst; measuring a color change, and correlating the color change to nitrate concentration.
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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：US11035798B2
公开(公告)日：2021-06-15
申请号：US16512054
申请日：2019-07-15
Applicant: Hach Company
Inventor： Darren Kent MacFarland , Rachel Nicole Seals
Abstract: An embodiment provides a method for measuring amines in a solution, including: preparing an indicator-metal complex, wherein the indicator-metal complex comprises an indicator and a metal; introducing the indicator-metal complex to a solution, wherein the solution contains an amount of amine, wherein the amine activates the indicator-metal complex causing a change in fluorescence intensity of the indicator-metal complex; and measuring the amount of amine in the solution by measuring the change in fluorescence intensity of the indicator-metal complex.
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Patent Agency Ranking
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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公开(公告)号：US20240192136A1
公开(公告)日：2024-06-13
申请号：US18078153
申请日：2022-12-09
Applicant: Hach Company
Inventor： Daniel Gustav Mieritz , Darren Kent MacFarland
CPC classification number: G01N21/6428 , G01N33/52 , G01N2021/6439
Abstract: An embodiment provides a method for measuring an analyte component of an aqueous sample, including: introducing an indicator solution to the aqueous sample, wherein the indicator solution comprises a plurality of micelles, wherein an indicator is within the micelles and the plurality of micelles is assembled from a cationic surfactant to form an indicator solution; and measuring an analyte component concentration of the aqueous sample, wherein the measuring comprises measuring a change in fluorescence in the aqueous sample, wherein the change in fluorescence is responsive to the analyte component interacting with the indicator. Other aspects are described and claimed.
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公开(公告)号：US20240191130A1
公开(公告)日：2024-06-13
申请号：US18078146
申请日：2022-12-09
Applicant: Hach Company
Inventor： Daniel Gustav Mieritz , Darren Kent MacFarland
CPC classification number: C09K11/06 , G01N21/643 , G01N2021/7786
Abstract: An embodiment provides a method for measuring an analyte component of an aqueous sample, including: introducing an indicator solution to the aqueous sample, wherein the indicator solution comprises a plurality of micelles, wherein an indicator is within the micelles and the plurality of micelles is assembled from a cationic surfactant to form an indicator solution, wherein the assembly occurs in the presence of an amount of alcohol; and measuring an analyte component concentration of the aqueous sample, wherein the measuring comprises measuring a change in fluorescence in the aqueous sample, wherein the change in fluorescence is responsive to the analyte component interacting with the indicator. Other aspects are described and claimed.
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公开(公告)号：US11953480B2
公开(公告)日：2024-04-09
申请号：US17058610
申请日：2019-06-27
Applicant: HACH COMPANY
Inventor： Angella Nicholle Greenawalt , Darren Kent MacFarland
CPC classification number: G01N31/226 , A01N37/16 , A01N59/00 , C02F1/722 , G01N21/63 , C02F2303/04
Abstract: An embodiment provides a method for measuring peracetic acid concentration in an aqueous solution, including: combining, in a reactive solution, 4-(methylthio)aniline and at least one reactive species to produce a chromophore, wherein the at least one reactive species comprises a chromotropic acid disodium salt; placing the chromophore in an aqueous solution, wherein the aqueous solution comprises peracetic acid, wherein peracetic acid within the aqueous solution reacts with the chromophore; and measuring a concentration of peracetic acid within the aqueous solution, wherein the measuring comprises quantifying a colorimetric change of the aqueous solution caused by the peracetic acid reacting with the chromophore. Other embodiments are described and claimed.
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