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公开(公告)号：US09746451B2
公开(公告)日：2017-08-29
申请号：US14677718
申请日：2015-04-02
Applicant: Hach Company
Inventor： Kevin J. West , Brian Harmon , Zhao Lu
CPC classification number: G01N33/182 , G01N33/84
Abstract: An aspect provides a method of determining a concentration of free chlorine in an aqueous sample, including adding a reagent to the sample, the reagent being reactive with the free chlorine at a first kinetic rate and reactive with at least one chloramine at a second kinetic rate, the first kinetic rate being different from the second kinetic rate; measuring an absorbance response over time resulting from reaction of the free chlorine and the at least one chloramine with the reagent over time; and determining the concentration of the free chlorine in the sample based on a determined rate of change of the absorbance response over time. Other aspects are described and claimed.
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公开(公告)号：US10175163B2
公开(公告)日：2019-01-08
申请号：US15281678
申请日：2016-09-30
Applicant: Hach Company
Inventor： Zhao Lu , Brian Harmon
Abstract: An embodiment provides a method for determining a concentration of an analyte in a fluid sample, including: introducing a fluid sample into a measurement chamber; operating a measurement device to introduce light of a first wavelength to the fluid sample; measuring, with a detector, absorbance of the light of the first wavelength with respect to the fluid sample; operating the measurement device to introduce light of a second wavelength to the fluid sample; measuring, with the detector, absorbance of the light of the second wavelength with respect to the fluid sample; determining, using a processor of the measurement device, an absorbance ratio of the fluid sample using both the measured absorbance of the light of the first wavelength and the measured absorbance of the light of the second wavelength; and providing, via an output device, a determined concentration value for the fluid sample that correlates to the absorbance ratio. Other aspects are described and claimed.
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公开(公告)号：US20170097300A1
公开(公告)日：2017-04-06
申请号：US15281678
申请日：2016-09-30
Applicant: Hach Company
Inventor： Zhao Lu , Brian Harmon
CPC classification number: G01N21/27 , G01N21/78 , G01N33/1853 , G01N2201/0221 , G01N2201/12
Abstract: An embodiment provides a method for determining a concentration of an analyte in a fluid sample, including: introducing a fluid sample into a measurement chamber; operating a measurement device to introduce light of a first wavelength to the fluid sample; measuring, with a detector, absorbance of the light of the first wavelength with respect to the fluid sample; operating the measurement device to introduce light of a second wavelength to the fluid sample; measuring, with the detector, absorbance of the light of the second wavelength with respect to the fluid sample; determining, using a processor of the measurement device, an absorbance ratio of the fluid sample using both the measured absorbance of the light of the first wavelength and the measured absorbance of the light of the second wavelength; and providing, via an output device, a determined concentration value for the fluid sample that correlates to the absorbance ratio. Other aspects are described and claimed.
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公开(公告)号：US20150285779A1
公开(公告)日：2015-10-08
申请号：US14677718
申请日：2015-04-02
Applicant: Hach Company
Inventor： Kevin J. West , Brian Harmon , Zhao Lu
IPC: G01N33/18
CPC classification number: G01N33/182 , G01N33/84
Abstract: An aspect provides a method of determining a concentration of free chlorine in an aqueous sample, including adding a reagent to the sample, the reagent being reactive with the free chlorine at a first kinetic rate and reactive with at least one chloramine at a second kinetic rate, the first kinetic rate being different from the second kinetic rate; measuring an absorbance response over time resulting from reaction of the free chlorine and the at least one chloramine with the reagent over time; and determining the concentration of the free chlorine in the sample based on a determined rate of change of the absorbance response over time. Other aspects are described and claimed.
Abstract translation: 一方面提供一种测定水样品中游离氯浓度的方法，包括向样品中加入试剂，试剂以游离氯以第一动力学速率反应，并以第二动力学速率与至少一种氯胺反应 第一动力学速率与第二动力学速率不同; 随着时间的推移测量随着游离氯和至少一种氯胺与试剂反应而产生的随时间的吸光度响应; 并根据确定的吸光度响应随时间变化的变化率确定样品中游离氯的浓度。 描述和要求保护其他方面。
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