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8452626 
Journal Article 
Determination of trace impurities in high-purity phosphorus by atomic absorption spectrometry 
Wunderlich, E; Hädeler, W 
1977 
0 
Fresenius' Zeitschrift für Analytische Chemie
ISSN: 0016-1152 
284 
1 
19-21 
German 
After oxidizing the sample to H3PO4 with HNO3/HCl, the cations are absorbed on a strong acid cation exchange resin. They are eluted with HCl and are determined by AAS. Under the most commonly found impurities of high-purity red phosphorus, the alkali and alkaline earth elements and most of the heavy metals can be separated. Fe and As are not separated, Al is partially separated. Fe and Al are isolated by extraction of their 8-quinolinol compounds. As is extracted from HBr with benzene and is determined by means of the AsH3-method. © 1977 Springer-Verlag.