Chris T Harvey

US Patent:

20060260419, Nov 23, 2006

Filed:

May 18, 2006

Appl. No.:

11/437906

Inventors:

Chris Harvey - French Camp CA, US

International Classification:

G01N 1/22

US Classification:

073864000

Abstract:

An offline solid phase microextraction (SPME) sampling apparatus for enabling SPME samples to be taken a number of times from a previously collected fluid sample (e.g. sample atmosphere) stored in a fused silica lined bottle which keeps volatile organics in the fluid sample stable for weeks at a time. The offline SPME sampling apparatus has a hollow body surrounding a sampling chamber, with multiple ports through which a portion of a previously collected fluid sample may be (a) released into the sampling chamber, (b) SPME sampled to collect analytes for subsequent GC analysis, and (c) flushed/purged using a fluidically connected vacuum source and purging fluid source to prepare the sampling chamber for additional SPME samplings of the same original fluid sample, such as may have been collected in situ from a headspace.

US Patent:

20140366651, Dec 18, 2014

Filed:

Jun 18, 2014

Appl. No.:

14/308503

Inventors:

Chris Harvey - French Camp CA, US
Jerry Carter - Livermore CA, US
David M. Chambers - Johns Creek GA, US

International Classification:

G01N 1/10

US Classification:

7386321

Abstract:

A magnetically-induced SPME fiber actuation system includes a SPME fiber holder and a SPME fiber holder actuator, for holding and magnetically actuating a SPME fiber assembly. The SPME fiber holder has a plunger with a magnetic material to which the SPME fiber assembly is connected, and the magnetic SPME fiber holder actuator has an elongated barrel with a loading chamber for receiving the SPME fiber assembly-connected SPME fiber holder, and an external magnet which induces axial motion of the magnetic material of the plunger to extend/retract the SPME fiber from/into the protective needle of the SPME fiber assembly.