Method and composition for testing for the presence of an alkali metal
First Claim
1. A liquid composition for detecting the presence of an alkali metal on the surface of a body comprising:
- a light-colored pigment, an acid-base indicator, and a nonionic wetting agent dispersed in a liquid carrier which comprises a minor amount of water and a major amount of an organic solvent selected from the group consisting of lower aliphatic alcohols, ketones and ethers.
0 Assignments
0 Petitions
Accused Products
Abstract
A method and composition for detecting the presence of an alkali metal on the surface of a body such as a metal plate, tank, pipe or the like is provided. The method comprises contacting the surface with a thin film of a liquid composition comprising a light-colored pigment, an acid-base indicator, and a nonionic wetting agent dispersed in a liquid carrier comprising a minor amount of water and a major amount of an organic solvent selected from the group consisting of the lower aliphatic alcohols, ketones and ethers. Any alkali metal present on the surface in elemental form or as an alkali metal hydroxide or alkali metal carbonate will react with the acid-base indicator to produce a contrasting color change in the thin film, which is readily discernible by visual observation or automatic techniques.
-
Citations
9 Claims
-
1. A liquid composition for detecting the presence of an alkali metal on the surface of a body comprising:
a light-colored pigment, an acid-base indicator, and a nonionic wetting agent dispersed in a liquid carrier which comprises a minor amount of water and a major amount of an organic solvent selected from the group consisting of lower aliphatic alcohols, ketones and ethers. - View Dependent Claims (2, 3, 4)
-
5. A method for detecting the presence of an alkali metal on the surface of a body comprising:
applying to said surface a thin film of a liquid composition comprising a light-colored pigment, an acid-base indicator and a nonionic wetting agent dispersed in a liquid carrier which comprises a minor amount of water and a major amount of an organic solvent selected from the group consisting of lower aliphatic alcohols, ketones and ethers, whereby any alkali metal present on the surface will react with the acid-base indicator to produce a contrasting color change in the thin film which is readily discernable. - View Dependent Claims (6, 7, 8, 9)
Specification