The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Dec. 31, 1991
Filed:
Jul. 25, 1990
Theodore E Miller, Jr, Midland, MI (US);
Melanie C Poon, Reynoldsburg, OH (US);
The Dow Chemical Company, Midland, MI (US);
Abstract
A chemical analysis method for indirect detection thin layer chromatography of cations that provides a rapid indication of the amount and type of cation present with minimal equipment requirements. The method includes four steps. The first step is to equilibrate a thin layer cation exchange chromatography plate with a color-forming cation, such as with copper II, to form a prepared plate. The second step is to deposit a sample on the prepared plate to form a spotted plate, the sample containing a cation of interest, such as sodium I. The third step is to develop the spotted plate with a liquid solution containing the color-forming cation, such as a solution of copper II ions, to chromatograph the cation of the sample to form a developed plate. The last step is to expose the developed plate to a chemical agent, such as ammonia, to visualize the color-forming cation by a chemical reaction between the chemical agent and the color-forming cation to form a colored species, such as the blue colored copper II/ammonia complex. When this is done, the chromatographed sample cation is apparent as region of less intense color in a field of color on the plate generated by the colored species.