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4,5-Diamino-2,6-dimercaptopyrimidine as a spectrophotometric reagent for the determination of selenium in semiconductors and animal feeds



4,5-Diamino-2,6-dimercaptopyrimidine as a spectrophotometric reagent for the determination of selenium in semiconductors and animal feeds



Analyst 106(1263): 720-723



An acid digest of animal feed is treated with H2O2 to convert Se6+ to Se4+. A portion with 10-100 mu g Se is neutralized with NaOH then 5 ml 5 NHCl, 1 ml 0.1% 4,5-diamino-2,6-dimercaptopyrimidine (DDP) and water to 25 ml are added. Absorbance is measured at 495 nm.

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Accession: 000803734

Download citation: RISBibTeXText

DOI: 10.1039/an9810600720


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