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公开(公告)号：US10794882B2
公开(公告)日：2020-10-06
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：US10670573B2
公开(公告)日：2020-06-02
申请号：US15714455
申请日：2017-09-25
Applicant: Hach Company
Inventor： Arnold Bertron Kidd, IV
Abstract: An embodiment provides a method for measuring ions in a solution, including: preparing a measurement device comprising an active indicator, wherein the active indicator comprises a silver complex; introducing the measurement device to a solution, wherein the silver complex reacts with the solution and generates a precipitation comprising one of the elements selected from the group consisting of: silver chloride, silver sulfide, and mixtures thereof; and measuring an amount of one of the elements selected from the group consisting of: chloride and sulfide, in the solution, wherein the measuring comprises identifying a peak of the precipitation on a portion of the measurement device and comparing the peak to a measurement chart.
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213.发明授权公开(公告)号：US10539529B2
公开(公告)日：2020-01-21
申请号：US15690587
申请日：2017-08-30
Applicant: HACH COMPANY
Inventor： Vishnu V Rajasekharan
IPC: G01N27/49
Abstract: A method for determination of an unknown analyte using quantitative electrochemical generation of a detectable species, which provides specified quantities of the species, is described. As an example, free chlorine concentration measurements may be performed using N,N-Diethyl-p-phenylenediamine (DPD), or N,N-bis(2,4-di-sulfobenzyl)toluidinetetrasodium salt (SBT), for obtaining an in-situ calibration curve, whereby matrix effects are eliminated.
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公开(公告)号：US10408648B2
公开(公告)日：2019-09-10
申请号：US15198911
申请日：2016-06-30
Applicant: Hach Company
Inventor： David L. Rick , Ernie Ray Paoli , Philip N. King
IPC: G01F1/66 , G01F1/00 , G01P5/24 , G01N29/024
Abstract: An embodiment provides a method for measuring a fluid parameter of fluid flowing in a channel, including: transmitting, using a transmitter of a device, directed energy carrying a signal toward a surface of a fluid in a fluid channel, so as to produce one or more reflections from the fluid surface; detecting, by at least one receiver of the device, one or more received signals associated with the one or more reflections so produced; and determining, based upon a measurement beam comprising characteristics of the transmitted and received signals, a fluid parameter to be measured using a processor of the device; wherein, a measurement beam characteristic is adjusted based on a distance from the device to the fluid surface. Other embodiments are described and claimed.
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公开(公告)号：US10302552B2
公开(公告)日：2019-05-28
申请号：US14521713
申请日：2014-10-23
Applicant: Hach Company
Inventor： Vishnu V. Rajasekharan , John Lee , Richard E. Leggett
Abstract: Methods for measuring chemical oxygen demand, a composition and a kit useful for measuring chemical oxygen demand, a method for calibrating a chemical oxygen demand analysis method, and a method for determining carbonaceous chemical oxygen demand are disclosed.
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Patent Agency Ranking
公开(公告)号：US10295385B2
公开(公告)日：2019-05-21
申请号：US15199249
申请日：2016-06-30
Applicant: Hach Company
Inventor： David L. Rick , Lawrence J. Scally , Dean Joseph Pizio , Ernie Ray Paoli , Philip N. King
Abstract: An embodiment provides a method for measuring velocity of fluid flow in a channel, including: transmitting, using a transmitter, directed energy carrying a signal toward a surface of a fluid in a fluid channel so as to produce a plurality reflections from locations substantially spanning the entire width of the fluid channel; detecting, using a plurality of measurement beams, received signals from the plurality of reflections so produced; determining, based upon differences between transmitted and received signals, a plurality of localized velocities; and computing, from the plurality of localized velocities, a cross-sectional average velocity of fluid in the channel. Other embodiments are described and claimed.
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公开(公告)号：US20190086531A1
公开(公告)日：2019-03-21
申请号：US15711591
申请日：2017-09-21
Applicant: Hach Company
Inventor： David L. Rick
CPC classification number: G01S13/582 , G01F23/284 , G01F23/2962 , G01S7/354 , G01S7/4911 , G01S7/4913 , G01S7/536 , G01S13/10 , G01S13/34 , G01S13/583 , G01S13/88 , G01S15/32 , G01S15/586 , G01S15/88 , G01S17/32 , G01S17/58 , G01S17/88 , G01S2007/356 , H04B1/69 , H04B2001/6912
Abstract: A method for constructing a frequency profile of an emitted signal suitable for use in a non-contact ranging system with multi-scale spectral analysis includes determining N stepped frequency chirps, wherein each frequency chirp of the N stepped frequency chirps has a linear FM modulation of predetermined bandwidth and slope, and wherein a starting frequency for each of the plurality of stepped frequency chirps is chosen so that a non-linear step profile is created which extends over a predetermined total bandwidth, sorting the plurality of N stepped frequency chirps into P sub-sequences, where P is equal to the product of decimation factors to be used in the multi-scale spectral analysis, and ordering the P sub-sequences end to end in time.
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公开(公告)号：US10203316B2
公开(公告)日：2019-02-12
申请号：US15223781
申请日：2016-07-29
Applicant: Hach Company
Inventor： Darren Kent MacFarland , Brendan Easley Young
IPC: G01N31/22 , G01N33/18 , G01N21/78 , B01J31/24 , C07C323/66 , C07D311/82 , B01J31/18 , B01J31/28 , B01J31/30
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：USD806826S1
公开(公告)日：2018-01-02
申请号：US29569867
申请日：2016-06-30
Applicant: Hach Company
Designer： Michael John Larsen , Jonathan Paul Janney , Paul Perlic , Alexander Evan Roeca
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公开(公告)号：US09791430B2
公开(公告)日：2017-10-17
申请号：US14721960
申请日：2015-05-26
Applicant: HACH COMPANY
Inventor： Ramon Hammerschmidt
CPC classification number: G01N33/1846 , G01N21/272 , G01N21/3504 , G01N21/61 , G01N21/75 , Y10T436/204998 , Y10T436/235
Abstract: A method for determining the total organic carbon in a sample which includes mixing the sample with a reagent containing at least one acid effective for reacting with inorganic carbon-containing materials in the sample, and at least one oxidizing agent effective for oxidizing organic carbon-containing materials in the sample in the presence of ultraviolet radiation, and detecting the carbon dioxide generated, is described. The at least one acid may include phosphoric acid, while the oxidizing agent may include sodium persulfate. In accordance with an embodiment of the inventive concept, the sample is first injected into a reaction chamber, which is continuously flushed with carbon dioxide free gas with no UV light present, and CO2 generated from any inorganic carbon in the sample as carbonates is flowed through the detector, and may be recorded. Subsequent to this step, the UV light is passed through the reaction chamber and CO2 generated from the reaction of the at least one oxidizing agent with the organic material in the solution in the presence of ultraviolet radiation, is flowed through the detector, which may be a non-dispersive infrared detector, after the reaction chamber is sparged using a carbon dioxide free gas, and recorded.
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