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Direct Determination of Stannic Ion in the Presence of Stanous Ion

IP.com Disclosure Number: IPCOM000095491D
Original Publication Date: 1964-Feb-01
Included in the Prior Art Database: 2005-Mar-07
Document File: 1 page(s) / 11K

Publishing Venue

IBM

Related People

Sankuer, RF: AUTHOR [+2]

Abstract

Stannic ion can be analyzed directly and quantitatively in the presence of varying amounts of stannous ion where the ions are in a strongly acid medium. There is no need to separate or convert the stannous species to stannic ion since it does not interfere in the analysis.

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Direct Determination of Stannic Ion in the Presence of Stanous Ion

Stannic ion can be analyzed directly and quantitatively in the presence of varying amounts of stannous ion where the ions are in a strongly acid medium. There is no need to separate or convert the stannous species to stannic ion since it does not interfere in the analysis.

An example of the procedure is to prepare a 4% by weight solution of 8- hydroxyquinoline in hydrochloric acid with the solution having a pH of between
0.7 to 0. 9. Twenty-five ml each of chloroform and the prepared 4% solution of 8-hydroxyquinoline are added to a separatory funnel. An appropriate aliquot of solution to be tested for stannic ion is also added to the separatory funnel.

The mixture in the separatory funnel is shaken for approximately two minutes with occasional venting. The mixture is allowed to separate into two layers. The lower chloroform layer is drained into an appropriate cell and the light transmission characteristic measured on a spectrophotometer. The absorbency is compared against a calibration of absorbency versus concentration of the stannic ion and the stannic ion concentration of the sample is determined.

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