Abstract
A spectrophotometric method for the microdetermination of sulfur in organic compounds is described. It is based on oxygen-flask combustion to yield sulfate, which is then reacted with an excess of barium dichromate solution in hydrochloric acid, followed by raising the pH with alkali, collection of the combined barium chromate and sulfate precipitate, and spectrophotometric determination of the free chromate (equivalent to the sulfate originally present) using 1,5-diphenylcarbazide at λ max = 540 nm.
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