# US 2024/0201057 A1 · Toc analyzer

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- Number: US 2024/0201057 A1
- Document ID: US20240201057A1
- Status: Published application
- Kind: A1
- Application number: 18/545,404
- Filed: 2023-12-19
- Published: 2024-06-20
- Earliest claimed: 2022-12-20
- Assignees: Endress+Hauser Conducta GmbH+Co. KG
- Applicants: Endress+Hauser Conducta GmbH+Co. KG
- Inventors: Christian Cramer; Eva-Maria Petat; Maik Röder; Joachim Rotter; Kay Steen
- Web page: https://patentgrep.com/patent/US20240201057A1

## CPC

- G01N 1/44: Sample treatment involving radiation, e.g. heat
- G01N 1/38: Diluting, dispersing or mixing samples
- G01N 21/3504: for analysing gases, e.g. multi-gas analysis
- 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)

## Abstract

The present disclosure discloses a TOC analyzer for determining a carbon content of a sample, comprising a reservoir vessel having a sample feed line and at least one sample removal line to a high-temperature furnace, a stirrer for stirring the sample in the reservoir vessel and at least one inlet for introducing CO2-free gas into the sample in the reservoir vessel. The high-temperature furnace vaporizes and/or oxidizes the introduced sample at a high temperature so as to form water vapor and carbon dioxide gas. An analysis unit determines the carbon content of the sample on the basis of the carbon dioxide gas produced from the vaporization and/or oxidation of the sample. A data processing unit which is designed at least to control the inflow and outflow of the sample from and into the reservoir vessel or the high-temperature furnace, and to determine the carbon content of the sample.

## Claims

### Claim 1

A TOC analyzer for determining a carbon content of a sample, comprising
a reservoir vessel having a sample feed line for the sample and at least one sample removal line to a high-temperature furnace, a stirrer for stirring the sample in the reservoir vessel and at least one inlet for introducing CO2-free gas into the sample in the reservoir vessel;
the high-temperature furnace for vaporizing and/or oxidizing the introduced sample at a high temperature so as to form water vapor and carbon dioxide gas;
the analysis unit for determining the carbon content of the sample on the basis of the carbon dioxide gas produced from the vaporization and/or oxidation of the sample; and
a data processing unit which is designed at least to control the inflow and outflow of the sample from and into the reservoir vessel or the high-temperature furnace, and to determine the carbon content of the sample.

### Claim 2 (depends on 1)

The TOC analyzer according to claim 1,
wherein the stirrer is configured as a magnetic stirrer.

### Claim 3 (depends on 1)

The TOC analyzer according to claim 1,
wherein the reservoir vessel comprises at least two sample removal lines, wherein the sample removal lines are arranged at different heights.

### Claim 4 (depends on 1)

The TOC analyzer according to claim 1,
wherein the inlet for introducing CO2-free gas into the reservoir vessel is designed as a capillary.

### Claim 5 (depends on 4)

The TOC analyzer according to claim 4,
wherein the reservoir vessel comprises at least two inlets for introducing CO2-free gas.

### Claim 6 (depends on 1)

The TOC analyzer according to claim 1,
wherein the inlet for introducing CO2-free gas is arranged close to the bottom.

### Claim 7 (depends on 1)

The TOC analyzer according to claim 1,
wherein the inlet for introducing CO2-free gas protrudes into the reservoir vessel such that the distance from all walls and other inlets is equal.

### Claim 8 (depends on 1)

The TOC analyzer according to claim 1,
wherein the reservoir vessel is designed as a hollow cylinder, in particular as a rotary part made of a plastics material.

### Claim 9 (depends on 1)

The TOC analyzer according to claim 1,
wherein the TOC analyzer comprises an inlet for a carrier gas, wherein the inlet leads to a high-temperature furnace, wherein the carrier gas serves to transport the carbon dioxide gas formed in the high-temperature furnace during oxidation of the sample to the analysis unit.

### Claim 10 (depends on 1)

The TOC analyzer according to claim 1, comprising
a filter between the high-temperature furnace and the analysis unit for filtering acid gases, dust and/or aerosols.