Abstract
Abstract Selenium(IV) reacts with 4-nitro-o-phenylenediamine to form 5-nitropiaselenol, which is detected by means of a gas chromatograph equipped with an electron-capture detector. By this highly sensitive method, the determination of very small amounts of selenium in plant materials has been investigated. Fuming nitric acid digests the plant sample completely, and the selenium is converted to the quadrivalent state. No loss of selenium can be found by this treatment. A method is proposed for the determination of selenium in plant materials at levels as low as 0.005 μg/g in dried material.
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