中科微点-全球专利检索

  1. Login
  2. Sign Up

Search Results

236 records (took 0.024 seconds)

    COMBINED AND FREE CHLORINE MEASUREMENT THROUGH ELECTROCHEMICAL MICROSENSORS
    121.
    发明申请
    COMBINED AND FREE CHLORINE MEASUREMENT THROUGH ELECTROCHEMICAL MICROSENSORS 审中-公开

    公开(公告)号：US20180328885A1

    公开(公告)日：2018-11-15

    申请号：US15775928

    申请日：2016-11-11

    Applicant: HACH COMPANY

    Inventor： Vishnu Rajasekharan ,  Corey Salzer

    IPC: G01N27/416 ,  G01N33/18 ,  G01N27/403

    CPC classification number: G01N27/4168 ,  C02F2209/29 ,  G01N27/403 ,  G01N33/18 ,  G01N33/182

    Abstract: One embodiment provides a method, including: initiating, at a generator electrode in an electrode array having a collector electrode adjacent to but physically separate from the generator electrode, a reduction reaction for an oxygen containing species and a monochloramine species present in a water sample; said initiating comprising generating, at the generator electrode, a generator current producing the reduction reaction; detecting, at the collector electrode, a collector current associated with products formed from the reduction reaction; wherein the electrode array is biased to preferentially detect one or more products of the reduction reaction; and determining, by comparing the generator current with the collector current, concentrations of oxygen containing species and monochloramine species present in the water sample.

    ALKALINITY SENSOR
    123.
    发明申请
    ALKALINITY SENSOR 审中-公开

    公开(公告)号：US20180224397A1

    公开(公告)日：2018-08-09

    申请号：US15745586

    申请日：2017-06-22

    Applicant: HACH COMPANY

    Inventor： Dan J Kroll ,  Corey SALZER

    IPC: G01N27/44 ,  G01N27/416 ,  G01N27/42 ,  G01N27/30 ,  G01N33/18 ,  G01N31/16

    CPC classification number: G01N27/44 ,  G01N27/302 ,  G01N27/308 ,  G01N27/4167 ,  G01N27/423 ,  G01N31/164 ,  G01N33/182

    Abstract: An embodiment provides a method for determining the alkalinity of an aqueous sample using an alkalinity sensor, including: monitoring the pH of an aqueous sample using a pH sensor in a sample cell, the pH sensor including a pH sensor electrode made of boron-doped diamond; generating hydronium ions, using a hydronium generator, in the aqueous sample in the sample cell, the hydronium generator including a hydronium-generating electrode; changing the pH of the aqueous sample by causing the hydronium generator to generate an amount of hydronium ions in the aqueous sample; quantifying and converting a current or charge to the number of hydronium ions produced to an end point of the electrochemical titration, the end point correlating to the alkalinity of a sample; and analyzing the alkalinity of the aqueous sample based on the generated amount of hydronium ions and the resulting change in pH monitored by the pH sensor.

    DETERMINATION OF ANALYTES USING ELECTROCHEMICALLY ACTIVE INDICATOR SPECIES AS REACTANTS
    124.
    发明申请
    DETERMINATION OF ANALYTES USING ELECTROCHEMICALLY ACTIVE INDICATOR SPECIES AS REACTANTS 审中-公开

    公开(公告)号：US20180059057A1

    公开(公告)日：2018-03-01

    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.

    FLOW METER WITH ADAPTABLE BEAM CHARACTERISTICS
    126.
    发明申请
    FLOW METER WITH ADAPTABLE BEAM CHARACTERISTICS 审中-公开

    公开(公告)号：US20180003533A1

    公开(公告)日：2018-01-04

    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

    IPC: G01F1/58 ,  G01F1/66

    CPC classification number: G01F1/58 ,  G01F1/002 ,  G01F1/66 ,  G01F1/663

    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.

    Chlorine analytical test element and a stabilized N, N-diethyl-p-phenylenediamine solution
    129.
    发明授权
    Chlorine analytical test element and a stabilized N, N-diethyl-p-phenylenediamine solution 有权
    氯分析试验元素和稳定的N，N-二乙基对苯二胺溶液

    公开(公告)号：US09545781B2

    公开(公告)日：2017-01-17

    申请号：US14310512

    申请日：2014-06-20

    Applicant: HACH COMPANY

    Inventor： Ibrahim A. Ismail ,  Matthew Hertel ,  Teresa Lynn Swanson

    IPC: B32B38/00 ,  G01N31/22

    CPC classification number: B32B38/164 ,  G01N31/224 ,  Y10T436/193333

    Abstract: A test element (10) used to determine concentration levels of free and total chlorine in a water sample comprises a test pad (12) adhered to a substrate (14), wherein the test pad (12) is impregnated with a stabilized DPD solution. The test pad (12) is color responsive to different concentration levels of chlorine in the water and compared to a color chart to determine the level of free chlorine and/or total chlorine in the water. The stabilized DPD solution may include N,N-diethyl-p-phenylenediamine oxalate salt, a polymeric anhydride such as a methyl-vinyl anhydride and an organo-sulfate such as dimethylsulfone.

    Abstract translation: 用于确定水样品中游离和总氯浓度水平的测试元件（10）包括粘附到基底（14）的测试垫（12），其中用稳定的DPD溶液浸渍测试垫（12）。 测试垫（12）对水中氯的不同浓度水平进行颜色响应，并与比色图进行比较，以确定水中游离氯和/或总氯的含量。 稳定的DPD溶液可以包括N，N-二乙基 - 对苯二胺草酸盐，聚合酐如甲基 - 乙烯基酐和有机硫酸酯如二甲基砜。

Patent Agency Ranking