公开(公告)号：AU2010292492B2

公开(公告)日：2014-02-06

申请号：AU2010292492

申请日：2010-08-27

Applicant: 1ST DETECT CORP

Inventor： OJEDA PEDRO ,  RAFFERTY DAVID ,  SPENCER MICHAEL ,  WYLDE JAMES

IPC: G01N1/40

Abstract: A chemical analysis system is disclosed wherein, in evacuating a preconcentrator housing (2) prior to desorption, a pump system (13) reduces an internal pressure of the preconcentrator housing to a level substantially equal to an internal pressure of a chemical analyzer such that flow restrictors and/or membranes (15) between the chemical analyzer (7) and the preconcentrator housing (2) may be omitted. The chemical analysis system includes a chemical analyzer (7), a preconcentrator housing (2) coupled to the chemical analyzer, the preconcentrator housing enclosing a temperature control element (5, 18) and a sorbent material (1), the temperature control element configured to heat the sorbent material to adsorb or desorb a chemical of interest; and a pump system (13) coupled to the preconcentrator housing and the chemical analyzer, the pump system configured to evacuate the preconcentrator housing prior to desorption of the chemical of interest.

公开(公告)号：CA2839890A1

公开(公告)日：2012-12-27

申请号：CA2839890

申请日：2012-06-21

Applicant: 1ST DETECT CORP

Inventor： RAFFERTY DAVID ,  RIAZ ABRAR ,  SPENCER MICHAEL ,  STOTT WILLIAM R ,  WYLDE JAMES

IPC: G01N1/40 ,  B01D3/10

Abstract: Processing a liquid sample (204) having an analyte (206) by reducing a pressure in a container (200) including the liquid sample to less than atmospheric pressure and maintaining a reduced pressure in the container. Reducing the pressure in the container (200) and optionally agitating the liquid sample increases an amount of vapor-phase analyte (206) above the liquid sample. In some cases, a concentration of the vapor-phase analyte is further increased, for example, with a chemical trap (502). The vapor-phase analyte can be provided to a chemical analyzer (302).

公开(公告)号：CA2826873A1

公开(公告)日：2012-08-16

申请号：CA2826873

申请日：2012-02-07

Applicant: 1ST DETECT CORP

Inventor： RAFFERTY DAVID ,  SPENCER MICHAEL ,  WYLDE JAMES ,  OJEDA PEDRO ,  BOWDEN THOMAS

IPC: G01N1/40

Abstract: A chemical preconcentrator (100) includes a conduit (200) defining a flow path (106) between two ends (108A, 108B) and having a heating element (102) disposed within the conduit, such that the heating element has at least one sorbent material (115) deposited directly on at least a portion of a conductive surface of the heating element. Some such heating elements (102) are in the form of electrically conductive strips defining both a plurality of apertures (112, 710) through the strip and a series of undulations (114) spaced along the flow path (106).