ISSN print edition: 0366-6352 ISSN electronic edition: 1336-9075 Registr. No.: MK SR 9/7 Published monthly

Fluorine determination in food and feed with the aid of the zirconium-SPADNA[2-(4-sulfophenylazo)-1,8-dihydroxy-3,6-naphthalene disulfonic acid] system after diffusion separation from perchloric acid

J. Tušl

Forschungsinstitut für Tierernährung, Pohořelice

Abstract:  In the present paper, a method for determination of fluorine in food-stuffs is described. Fluorine is separated by diffusion from 25% perchloric acid containing silver sulfate without previous ashing of the samples. After separation, fluorine is determined by an indirect photometric method, based on the decolouration of zirconium —SPADNS complex in the presence of perchloric and hydrochloric acids.

Full paper in Portable Document Format: 234a295.pdf (in German)

Chemical Papers 23 (4) 295–300 (1969)