Abstract
A simple and accurate spectrophotometric method for the determination of micro amount of tin (0.010 ppm) in some drinks and seasonings with gallin has been established.
Organic substance in the sample was decomposed with a sulfuric acid-nitric acid mixture and tin in the solution was concentrated by an extraction with benzene as its iodide, by which was removed the interference from large amount of sulfate ion in the decomposed solution.
The reproducibility of the method represented as a coefficient of variation was 1.3% for vinegar. The time required for a single determination was about 2 hours.
