Derivitization of vaporous chlorine by propylene oxide

Patent metadata

Field	Value
Publication number	US-10968154-B2
Application number	US-202016778208-A
Country	US
Kind code	B2
Filing date	Jan 31, 2020
Priority date	Feb 1, 2019
Publication date	Apr 6, 2021
Grant date	Apr 6, 2021

Abstract

Disclosed is a method of: providing a fiber having propylene oxide adsorbed thereon; exposing the fiber to a gaseous sample; allowing the propylene oxide to react with any chlorine in the sample to form chloro-2-propanol. The method can be used to detect potassium chlorate.

First claim

What is claimed is:

1. A method comprising:
providing a fiber having propylene oxide adsorbed thereon;
exposing the fiber to a gaseous sample;
allowing the propylene oxide to react with any chlorine and water vapor in the sample to form chloro-2-propanol.

2. The method of claim 1 , wherein the fiber is a polydimethylsiloxane/divinylbenzene/carboxen solid phase microextraction fiber.

3. The method of claim 1 , wherein providing the fiber comprises:
placing the fiber in the headspace of a vessel containing propylene oxide; and
allowing the propylene oxide to adsorb to the fiber.

4. The method of claim 1 , wherein the gaseous sample is suspected of containing volatile products of potassium chlorate.

5. The method of claim 1 , further comprising;
injecting the fiber into a gas chromatograph; and
detecting any chloro-2-propanol by gas chromatography.

6. A method comprising:
providing a fiber having ethylene oxide adsorbed thereon;
exposing the fiber to a gaseous sample;
allowing the ethylene oxide to react with any chlorine and water vapor in the sample to form chloro-2-ethanol.

7. The method of claim 6 , wherein the fiber is a polydimethylsiloxane/divinylbenzene/carboxen solid phase microextraction fiber.

8. The method of claim 6 , wherein providing the fiber comprises:
placing the fiber in the headspace of a vessel containing ethylene oxide; and
allowing the ethylene oxide to adsorb to the fiber.

9. The method of claim 6 , wherein the gaseous sample is suspected of containing volatile products of potassium chlorate.

10. The method of claim 6 , further comprising;
injecting the fiber into a gas chromatograph; and
detecting any chloro-2-ethanol by gas chromatography.

11. The method of claim 1 , wherein the gaseous sample is suspected of containing ionic, radical, or molecular chlorine.

12. The method of claim 6 , wherein the gaseous sample is suspected of containing ionic, radical, or molecular chlorine.

Assignees

• Us Gov Sec Navy

Inventors

• Degreeff Lauryn E
• Crespo Cajigas Janet M

Classifications

• G01N2030/067

  by reaction, e.g. derivatising the sample · CPC title

• G01N30/02

  Column chromatography · CPC title

• C07C29/62 Primary

  by introduction of halogen; by substitution of halogen atoms by other halogen atoms · CPC title

• G01N31/22 Primary

  using chemical indicators (G01N31/02 takes precedence) · CPC title

• G01N1/30

  Staining; Impregnating {; Fixation; Dehydration; Multistep processes for preparing samples of tissue, cell or nucleic acid material and the like for analysis} · CPC title