Introducing an analyte into a chemical analyzer

摘要

A chemical pre-concentrator includes a conduit defining a flow path between two ends and having a heating element disposed within the conduit, such that the heating element has at least one sorbent material deposited directly on at least a portion of a conductive surface of the heating element. Some such heating elements are in the form of electrically conductive strips defining both a plurality of apertures through the strip and a series of undulations spaced along the flow path.

主权项

1. A chemical pre-concentrator for increasing the concentration of an analyte comprising:
a conduit having an interior defining a flow path between a first end and a second end of the conduit; a heating element consisting of an electrical conductor with a sorbent material directly coated on at least a portion of a surface of the electrical conductor, wherein the heating element is disposed within the interior of the conduit; a first fitting component coupled to the first end of the conduit, the first fitting component having a first opening for the flow path into the conduit and having a first electrical lead extending through the first fitting component that is electrically connected to a first end of the heating element; and a second fitting component coupled to the second end of the conduit, the second fitting component having a second opening for the flow path into the conduit and having a second electrical lead extending through the second fitting component that is electrically connected to a second end of the heating element,
wherein the flow path extends along a path through the first opening, through the conduit, and through the second opening, andwherein the first and second fitting components are configured to allow evacuation of the conduit, such that, during an evacuation, the flow path between the first and second ends of the conduit is evacuated.