公开(公告)号：US5413916A

公开(公告)日：1995-05-09

申请号：US175136

申请日：1993-12-29

Applicant: Robert Anglin

Inventor： Robert Anglin

IPC: C12Q1/18 ,  C12Q1/00 ,  C12N1/00

CPC classification number: C12Q1/18 ,  Y10S435/968 ,  Y10S436/80

Abstract: A method is described for determining the toxicity of an environmental sample to bacteria. The method includes the use of resazurin dye as an indicator. Glutaraldehyde is used as an accelerating agent to speed the test.

Abstract translation: 描述了用于确定环境样品对细菌的毒性的方法。 该方法包括使用赤霉素染料作为指示剂。 戊二醛用作加速剂以加速试验。

公开(公告)号：USD333992S

公开(公告)日：1993-03-16

申请号：US637760

申请日：1991-01-07

Applicant: Mark E. Anderson

Designer： Mark E. Anderson

公开(公告)号：US4715710A

公开(公告)日：1987-12-29

申请号：US830969

申请日：1986-02-19

Applicant: Marinus L. Andersen

Inventor： Marinus L. Andersen

IPC: G01N21/27 ,  G01N1/10 ,  G01N21/85

CPC classification number: G01N21/276

Abstract: A pump colorimetric analyzer is described including: (a) a sample cell through which a light beam is transmitted, (b) a light source, (c) a photodetector, and (d) a piston which reciprocates between first and second positions in the cell. The piston includes a sample chamber which permits the light beam to be transmitted therethrough when the piston is in its second position. When the piston is in its first position the light beam is transmitted through the sample cell. The novel analyzer uses a single light source, a single sample cell and a single photodetector.

Abstract translation: 描述了一种泵比色分析仪，其包括：（a）透射光束的样品池，（b）光源，（c）光电检测器，和（d）活塞，其在第一和第二位置之间往复运动 细胞。 活塞包括样品室，当活塞处于其第二位置时允许光束透过。 当活塞处于其第一位置时，光束透过样品池。 新型分析仪使用单个光源，单个样品池和单个光电检测器。

公开(公告)号：US4645745A

公开(公告)日：1987-02-24

申请号：US807537

申请日：1985-12-12

Applicant: Clifford C. Hach

Inventor： Clifford C. Hach

IPC: G01N31/00 ,  G01N1/28 ,  G01N33/00

CPC classification number: G01N31/005 ,  G01N31/002 ,  Y10T436/176152 ,  Y10T436/176921 ,  Y10T436/25125

Abstract: An improved process for quantitatively determining nitrogen content in a wide variety of materials. The process avoids the use of conventional catalysts, is simpler and faster than previous techniques, and results in a very high degree of accuracy. The process involves the use of a reagent solution prepared by mixing hydrogen peroxide and concentrated sulfuric acid. The digestion process also enables quantitative determination of various elements other than nitrogen.

Abstract translation: 用于定量测定各种材料中氮含量的改进方法。 该方法避免使用常规催化剂，比以前的技术更简单和更快，并且导致非常高的准确度。 该方法包括使用通过混合过氧化氢和浓硫酸制备的试剂溶液。 消化过程还能够定量测定除氮以外的各种元素。

公开(公告)号：US12216054B2

公开(公告)日：2025-02-04

申请号：US17070113

申请日：2020-10-14

Applicant: HACH COMPANY

Inventor： Amit Das

IPC: G01N21/64 ,  G01N21/77 ,  G01N31/22 ,  G01N33/18 ,  C07D311/16

Abstract: An embodiment provides a method for measuring total chlorine in a solution, including: preparing a thiocarbamate indicator; introducing the thiocarbamate indicator to a solution, wherein the solution contains an amount of monochloramine; adding an additive to the solution, wherein the additive accelerates the reaction rate between the thiocarbamate indicator and monochloramine and causes a change in fluorescence of the solution; and measuring the amount of monochloramine in the solution by measuring an intensity of the fluorescence. Other aspects are described and claimed.

公开(公告)号：US12210007B2

公开(公告)日：2025-01-28

申请号：US17894803

申请日：2022-08-24

Applicant: Hach Company

Inventor： Corey Alan Salzer ,  Dan Jonathan Kroll

IPC: G01N33/18 ,  G01N1/38 ,  G01N27/42

Abstract: An embodiment provides a method for stirring a sample in a cell, including: providing a cell comprising a sample chamber; placing a boron-doped diamond electrode on an inner surface of the sample chamber, placing a removable stir bar in the sample chamber, the removable stir bar directly contacting and touching the boron-doped diamond electrode; and wherein the stir bar can be operated to rotate within the sample chamber upon the boron-doped diamond electrode. Other aspects are described and claimed.

公开(公告)号：US11959870B2

公开(公告)日：2024-04-16

申请号：US17569076

申请日：2022-01-05

Applicant: Hach Company

Inventor： Corey Alan Salzer ,  Russell Young

IPC: G01N27/333 ,  G01N27/30 ,  G01N27/403

CPC classification number: G01N27/302 ,  G01N27/301 ,  G01N27/333 ,  G01N27/4035

Abstract: An embodiment provides a method for measuring an analyte of a sample, including: introducing a sample to a sample region of a measurement device; the measurement device comprising: a measurement electrode and a ground electrode contacting the sample; a low-slope reference electrode in a reference electrode assembly having an electrolyte solution, wherein the electrolyte solution is in contact with the low-slope reference electrode; wherein the electrolyte solution is electrically coupled to the sample via at least one junction; and measuring a first potential between the measurement electrode and the ground electrode; measuring a second potential between the low-slope reference electrode and the ground electrode; determining an analyte in the sample by comparing the first potential and the second potential. Other aspects are described and claimed.

公开(公告)号：USD1019672S1

公开(公告)日：2024-03-26

申请号：US29801359

申请日：2021-07-28

Applicant: Hach Company

Designer： Michael Jonathan Tschampl ,  Reece W. Hopkins ,  Jennifer Kotch ,  Heather Nicole Goodrich ,  Victor Ray Williams

Abstract: The FIGURE is a front view of the ornamental design for a display screen with graphical user interface.
The portion of the user interface shown in broken lines forms no part of the claimed design. The outermost broken line rectangle in the FIGURE shows the display screen, and forms no part of the claimed design. All other broken lines show portions of the display screen with graphical user interface and form no part of the claimed design.

公开(公告)号：US20240069002A1

公开(公告)日：2024-02-29

申请号：US17894803

申请日：2022-08-24

Applicant: Hach Company

Inventor： Corey Alan Salzer ,  Dan Jonathan Kroll

IPC: G01N33/18 ,  G01N1/38

CPC classification number: G01N33/1853 ,  G01N1/38

Abstract: An embodiment provides a method for stirring a sample in a cell, including: providing a cell comprising a sample chamber; placing a boron-doped diamond electrode on an inner surface of the sample chamber, placing a removable stir bar in the sample chamber, the removable stir bar directly contacting and touching the boron-doped diamond electrode; and wherein the stir bar can be operated to rotate within the sample chamber upon the boron-doped diamond electrode. Other aspects are described and claimed.

公开(公告)号：US11906426B2

公开(公告)日：2024-02-20

申请号：US17058618

申请日：2019-06-27

Applicant: HACH COMPANY

Inventor： Robert Francis Dabkowski

IPC: G01N21/53 ,  C02F1/52

CPC classification number: G01N21/532 ,  C02F1/5209 ,  C02F2209/10

Abstract: The invention provides a method and a system for measuring suspended solids in wastewater, including: introducing an aqueous sample into a measurement system, comprising at least one length of tubing; pumping, using a pump, the aqueous sample through the at least one length of tubing; and measuring, using at least one optical sensor, a quantity of suspended solids in the aqueous sample wherein at least one optical sensor is coupled to the length of tubing in a position to measure the quantity of suspended solids while the aqueous sample is located in the at least one length of tubing.