High flow membrane probe

• US 5,553,484 A
• Filed: 05/12/1995
• Issued: 09/10/1996
• Est. Priority Date: 05/12/1995
• Status: Expired due to Fees

• Current Assignee: The Dow Chemical Company (Dow, Inc.)
• Original Assignee: The Dow Chemical Company (Dow, Inc.)
• Inventors: Daigle, Emanuel L., Ribes, Carolyn W., Bender, William J. H., DeLeo, Gary D., Westlake, Theodore N. III
• Primary Examiner(s): Williams, Hezron E.
• Assistant Examiner(s): WIGGINS, JOHN DAVID
• Application Number:
  US08/439,909
• Time in Patent Office: 487 Days
• Field of Search: 73/53.01, 73/54.05, 73/61.44, 73/863.21, 73/863.41, 73/863.81, 73/863.23, 73/861.04, 73/864.73, 73/866.5, 210/323.2, 210/433.1, 210/321.72, 210/321.88
• US Class Current: 73/53.01
• CPC Class Codes: G01N 1/34 Purifying; Cleaning processes or apparatus for extracting or separating nucleic acids from biological samples C12N15/1003
• CPC Class Codes: G01N 2001/4016 being a selective membrane, e.g. dialysis or osmosis

Abstract

A supported capillary membrane separator probe that uses multiple membrane tubes in a parallel configuration connected through common manifolds to the feed and return lines thus allowing greater carrier flow rates to and from the probe resulting in reduced sample lag time from the probe to its analyzer.

Claims

1. A high flow rate sampling apparatus having a carrier gas inlet, a gas return line outlet and a multitude of fluid flow paths disposed therebetween for use in determining the presence and/or concentration of one or more selected materials in a matrix stream or aggregation of flowable materials comprising:

a) a support member having a first, internal end for inserting into said matrix stream to facilitate fluid flow sampling when said apparatus is placed in service and a second end positioned externally of said matrix stream and wherein said support member underlies and defines a plurality of grooves in and along an external surface thereof of which at least a portion extends into said matrix stream in use;

b) a plurality of conduits which define a multitude of flow paths adapted to be placed in fluid communication with an analytical device external of said matrix stream each of which conduits are positioned and supported individually and substantially wholly within one different groove of said plurality of grooves in said support member extending into said matrix stream whereby said plurality of conduits with associated multitude of flow paths that may be placed in contact with said matrix stream while being protected by and supported within said plurality of grooves; and

c) a common header manifold formed from a carrier gas feed line and a return line where said header manifold is mounted in-between the location of said support member and said feed line and said return line for mixing together of said multitude of fluid flow paths.

2. An apparatus as defined in claim 1 having a flow rate of up to about 3,000 cc/min maintained through the plurality of conduits at a pressure of about 25 psig applied to said carrier gas feed line.