# US 10,119,951 B2 · On-line wet chemistry analyzer

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- Number: US 10,119,951 B2
- Document ID: US10119951B2
- Status: Granted
- Kind: B2
- Application number: 14/852,008
- Filed: 2015-09-11
- Published: 2016-03-17
- Granted: 2018-11-06
- Earliest claimed: 2014-09-12
- Assignees: Rosemount Inc.
- Applicants: Rosemount Inc.
- Inventors: Bradley A. Butcher; Hoang Minh Nguyen; Chang-Dong Feng
- Web page: https://patentgrep.com/patent/US10119951B2

## CPC

- G01N 33/18: Water
- G01N 1/4077: {by other techniques involving separation of suspended solids}
- G01N 21/01: Arrangements or apparatus for facilitating the optical investigation
- G01N 21/11: Filling or emptying of cuvettes
- G01N 21/78: producing a change of colour
- G01N 31/02: using precipitation {(measuring deposition or liberation of materials from an electrolyte G01N27/42)}
- G01N 31/22: using chemical indicators (G01N31/02 takes precedence)
- G01J 4/04: Polarimeters using electric detection means (G01J4/02 takes precedence)
- G01N 21/21: Polarisation-affecting properties (G01N21/19 takes precedence)
- G01N 21/3103: {Atomic absorption analysis}
- G01N 2201/0612: Laser diodes
- G01N 2201/062: LED's
- G01N 2201/127: Calibration; base line adjustment; drift compensation
- G01N: INVESTIGATING OR ANALYSING MATERIALS BY DETERMINING THEIR CHEMICAL OR PHYSICAL PROPERTIES (measuring or testing apparatus or processes other than immunoassay, involving enzymes or microorganisms C12M, C12Q)
- G01J: MEASUREMENT OF INTENSITY, VELOCITY, SPECTRAL CONTENT, POLARISATION, PHASE OR PULSE CHARACTERISTICS OF INFRARED, VISIBLE OR ULTRAVIOLET LIGHT; COLORIMETRY; RADIATION PYROMETRY (light sources F21, H01J, H01K, H05B; investigating properties of materials by optical means G01N)

## Abstract

A wet chemistry analyzer is provided. The wet chemistry analyzer comprises a reaction chamber configured to receive a reactant solution from a sample inlet and facilitate a process reaction. The wet chemistry analyzer also includes a detection chamber configured to receive a portion of a reaction mixture from the reaction chamber and measure a concentration of a chemical within the reaction mixture. The reaction chamber and the detection chamber are fluidically coupleable such that a portion of the reaction mixture can be directed to flow into the detection chamber to pre-condition a surface inside the detection chamber.

## Claims

### Claim 1

A wet chemistry analyzer comprising:
a reaction chamber configured to receive a reactant solution from a sample inlet and facilitate a process reaction;
a detection chamber, fluidically connected, through a first three-way valve to the reaction chamber, wherein the detection chamber is configured to receives a portion of a reaction mixture from the reaction chamber while the process reaction is ongoing and before the process reaction is completed; and
wherein the reaction chamber and the detection chamber are fluidically connected, through the first three-way valve, wherein the portion of the partially reacted reaction mixture is provided to the detection chamber and is configured to pre-condition a surface inside the detection chamber while the process reaction is occurring in parallel and proceeds to completion.

### Claim 2 (depends on 1)

The analyzer of claim 1, and further comprising:
a gas inlet fluidically connected to the reaction chamber, through a second three-way valve, wherein a gas flows into the reaction chamber from the gas inlet.

### Claim 3 (depends on 2)

The analyzer of claim 2, wherein the gas flows into the reaction chamber at a position that it facilitates mixing within the reaction chamber.

### Claim 4 (depends on 2)

The analyzer of claim 2, wherein the gas flows through the reaction chamber and the detection chamber and facilitates a partial removal of the portion of the reaction mixture from the detection chamber, through a third three-way valve, after the detection chamber surface is pre-conditioned.

### Claim 5 (depends on 1)

The analyzer of claim 1, wherein the first three-way valve is alternatively causes a coupling between the detection chamber and either a liquid holding portion of the reaction chamber or a gas holding portion of the reaction chamber.

### Claim 6 (depends on 1)

The analyzer of claim 1, wherein the detection chamber is also fluidically connected to a waste stream, through a third three-way valve that facilitates removal of the portion of the reaction mixture from the detection chamber prior to a second portion of the reaction mixture entering the detection chamber.

### Claim 7 (depends on 1)

The analyzer of claim 1, wherein the reaction chamber is coupled to the detection chamber, and wherein the portion of the reaction mixture enters the detection chamber without significant disturbance to the ongoing process reaction.