Browse Prior Art Database

Detection of Metal Chlorides

IP.com Disclosure Number: IPCOM000083015D
Original Publication Date: 1975-Mar-01
Included in the Prior Art Database: 2005-Feb-28
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

DiGiacomo, G: AUTHOR

Abstract

Metal chlorides may be significant contaminates in electrical apparatus and other articles that have been cleaned with a material that contains chlorine. A method of detecting and measuring this chlorine contamination has these steps:.

This text was extracted from a PDF file.
This is the abbreviated version, containing approximately 100% of the total text.

Page 1 of 1

Detection of Metal Chlorides

Metal chlorides may be significant contaminates in electrical apparatus and other articles that have been cleaned with a material that contains chlorine. A method of detecting and measuring this chlorine contamination has these steps:.

1. An ammonium hydroxide solution is applied to the sample that is to be tested. Any metal chloride in the sample reacts with the ammonium hydroxide to form ammonium chloride and a metal hydroxide. The ammonium chloride is soluble in the ammonium hydroxide solution and the metal hydroxide precipitates out of the solution.

2. After this reaction has taken place, a measured amount of the solution is put on a nonmetallic support such as a wafer of silicon. The ammonium chloride is left as a residue when this solution is evaporated from the wafer.

3. The ammonium chloride residue is free of any metal structure of the original test sample and metal of the original metal chloride, and it is tested by x- ray techniques. A standard sample can be prepared by performing these steps on a metal chloride film of known thickness.

1