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公开(公告)号：WO2022055691A1
公开(公告)日：2022-03-17
申请号：PCT/US2021/046934
申请日：2021-08-20
申请人： HACH COMPANY
摘要： 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：WO2020006272A1
公开(公告)日：2020-01-02
申请号：PCT/US2019/039566
申请日：2019-06-27
申请人： HACH COMPANY
摘要： 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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公开(公告)号：WO2023033888A1
公开(公告)日：2023-03-09
申请号：PCT/US2022/031235
申请日：2022-05-27
申请人： HACH COMPANY
摘要： An embodiment of a method for measuring an amount of manganese in an aqueous sample includes: reducing, using a dechlorination reagent, wherein the dechlorination reagent comprises iron(ll) and potassium iodide; oxidizing, under an alkaline condition using sodium hydroxide, Mn(ll) to Mn(IV) in the aqueous sample, chelating, using etidronic acid (HEDP), Fe(ll) and Fe(lll) in the aqueous sample, oxidizing an amount of the colorimetric indicator 3, 3', 5,5'- tetramethylbenzidine (TMB) with Mn(IV); and measuring the amount of manganese within the aqueous sample, by measuring an absorbance intensity at a wavelength of the oxidized amount of 3,3',5,5'-tetramethylbenzidine (TMB). Other aspects are described and claimed.
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公开(公告)号：WO2020214707A1
公开(公告)日：2020-10-22
申请号：PCT/US2020/028324
申请日：2020-04-15
申请人： HACH COMPANY
IPC分类号： G01N31/22
摘要： An embodiment provides A method for measuring fluoride concentration in an aqueous solution, including: preparing a metal-ligand complex, wherein the metal-ligand complex comprises chromeazurol S and aluminum; placing the metal-ligand complex in a sample containing fluoride, wherein the placing generates a color change by releasing the chromeazurol S from the metal-ligand complex; and measuring, using colorimetric techniques, a concentration of fluoride within the sample, wherein the measuring comprises measuring an absorbance wavelength of a colorimetric ligand. Other embodiments are described and claimed.
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5.发明申请
公开(公告)号：WO2020198725A1
公开(公告)日：2020-10-01
申请号：PCT/US2020/025588
申请日：2020-03-28
申请人： HACH COMPANY
摘要： 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：WO2020097020A3
公开(公告)日：2020-05-14
申请号：PCT/US2019/059781
申请日：2019-11-05
申请人： HACH COMPANY
摘要： 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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公开(公告)号：WO2021086866A1
公开(公告)日：2021-05-06
申请号：PCT/US2020/057559
申请日：2020-10-27
申请人： HACH COMPANY
摘要： An embodiment provides a method for measuring nitrate in an aqueous sample, including: introducing an aqueous sample containing an amount of nitrate to a cation exchange resin; flowing the aqueous sample over copper metal; adding a reducing reagent to the aqueous sample; adding a colorimetric indicator to the aqueous sample; and measuring the amount of nitrate in the aqueous sample by measuring a change in intensity of the absorbance. Other aspects are described and claimed.
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公开(公告)号：WO2020247720A8
公开(公告)日：2020-12-10
申请号：PCT/US2020/036269
申请日：2020-06-05
申请人： HACH COMPANY
IPC分类号： G01N33/18 , G01N31/22 , G01N2021/6439 , G01N2021/6443 , G01N21/643
摘要： 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：WO2020097020A2
公开(公告)日：2020-05-14
申请号：PCT/US2019/059781
申请日：2019-11-05
申请人： HACH COMPANY
摘要： An embodiment provides a method for measuring a concentration of lead(O) 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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公开(公告)号：WO2018144232A1
公开(公告)日：2018-08-09
申请号：PCT/US2018/014254
申请日：2018-01-18
申请人： HACH COMPANY
摘要： A method tor measuring aqueous manganese concentration includes adding a metal- ligand chelate including a chelating ligand and a metal coordinated with the chelating ligand to an aqueous sample wherein the metal of the metal-ligand chelate is other than Mn, such that the metal is preferentially displaced by MR from the aqueous sample under the conditions of reaction, and measuring the displaced metal
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