Methods and apparatus for detecting metals in liquids

Patent metadata

Field	Value
Publication number	US-9599560-B2
Application number	US-201414563304-A
Country	US
Kind code	B2
Filing date	Dec 8, 2014
Priority date	Jun 6, 2014
Publication date	Mar 21, 2017
Grant date	Mar 21, 2017

Abstract

Method for detecting metals in a liquid are described. The liquid is contacted with a hexahydrotriazine and/or a hemiaminal material, and a UV absorption spectrum of the material before and after exposure to the liquid is examined to determine whether metals are present in the liquid.

First claim

What is claimed is:

1. A method comprising:
exposing a detection material comprising a PHT material or a PHA material to UV radiation and detecting a first UV transmission spectrum of the detection material;
contacting the detection material with a liquid including one or more metals;
while contacting the detection material with the liquid containing metals, or after contacting the detection material with the liquid containing metals, detecting a second UV transmission spectrum of the detection material;
comparing the first UV transmission spectrum with the second UV transmission spectrum; and
determining whether metals are present in the detection material based on the comparison of the first UV spectrum with the second UV spectrum.

2. The method of claim 1 , wherein the detection material is a reaction product of an aldehyde and a primary diamine.

3. The method of claim 2 , wherein the detection material is a PHT material.

4. The method of claim 3 , wherein the PHT material comprises an aromatic bridging group.

5. The method of claim 2 , wherein the contacting the detection material with the liquid comprises forming a powder of the detection material and adding the powder to the liquid.

6. The method of claim 5 , wherein the powder is at least partially soluble in the liquid.

7. The method of claim 1 , wherein the contacting the detection material with the liquid comprises continuously flowing the liquid across the detection material.

8. The method of claim 2 , wherein the detection material is a material comprising a PHT material and a PHA material.

9. The method of claim 8 , wherein the PHT material or the PHA material comprises an aromatic bridging group.

10. The method of claim 1 , wherein the detection material is formed by a process comprising:
forming a mixture comprising one or more monomers comprising two aromatic primary amine groups having the general structure H 2 N—Ar-L′-Ar—N—H 2 , where Ar denotes a benzene ring group and L′ is a divalent group having the general structure

and a solvent; and
heating the mixture at a temperature of about 165° C. to about 280° C. for about 1 minute to about 24 hours.

Assignees

• IBM

Inventors

• Boday Dylan J
• Garcia Jeannette M
• Hedrick James L
• Wojtecki Rudy J
• Zimmerman Thomas

Classifications

• G01N21/59 Primary

  Transmissivity (G01N21/25 takes precedence) · CPC title

• G01N21/33

  using ultraviolet light (G01N21/39 takes precedence) · CPC title

• G01N2201/061

  Sources · CPC title

• G01N33/20

  Metals · CPC title

• G01N21/77 Primary

  by observing the effect on a chemical indicator · CPC title