US 2025/0027856 A1Published application

Thermal Desorption Preconcentrator Adapted for Spectroscopic Gas Analysis

AssigneePicarro, Inc.

InventorsKai M. Skog, James M. Hamilton, Chris W. Rella, Bruce A. Richman, Elizabeth R. Schemm, Rebecca Wernis

Life of this patent

Estimating the term…

Loading patent…

Abstract

Improved gas sample preprocessing is provided for scanning optical spectroscopic analysis instruments by tailoring characteristic gas handling times to the scan time Ts of the analysis instrument. In particular, for sample preconcentration, the desorption duration Td of the sample preconcentrator should be ≥2Ts. For gas chromatography, the elution duration Te of relevant eluted species should be ≥2Ts. This advantageously avoids having significant changes in the gas sample within the analysis instrument as a scan is being performed.

Claims36

Dependent claims

Apparatus for performing gas analysis, the apparatus comprising:

a gas analysis instrument based on optical absorption spectroscopy, wherein the gas analysis instrument performs a spectral scan in a scan time Ts;
a sample preconcentrator having an adsorption mode and a desorption mode;
a controller configured to at least switch between the adsorption mode and desorption mode of the sample preconcentrator;
wherein the adsorption mode includes receiving an input gas sample and adsorbing one or more constituents of the input gas sample to collect one or more adsorbed species;
wherein the desorption mode includes heating the sample preconcentrator to release at least some of the one or more adsorbed species to provide a preprocessed gas sample;
wherein the preprocessed gas sample is provided to the gas analysis instrument in a desorption time Td;
wherein Td is at least 2Ts.

4 more elements

Dependencies are inferred from the claim text.

Facts

Application: 18/225,012Filed 21 Jul 2023
Published: 23 Jan 2025
Term ends: Not estimatedThe source records don’t support an estimate.

Classification7 codes

G01N 1/405
Concentrating samples: by adsorption or absorption
G01N 1/44
Preparing specimens for investigation including physical details of chemical methods covered elsewhere, e.g. G01N33/50, C12Q: sample treatment…
G01N 21/31
Colour; Spectral properties, i.e. comparison of effect of material on the light at two or more different wavelengths or wavelength bands:…
G01N 21/3504
Using infrared light: for analysing gases, e.g. multi-gas analysis

Family

US 12,416,553 B2Related patent
US 2025/0027856 A1This patent

From the US filing history. Foreign family members aren’t listed.

Timeline

Citations

Open elsewhere

Building an agent or pulling many patents? Use the API or MCP server instead of scraping pages. Get an API key