Details

Autor(en) / Beteiligte

• Belikov, K. N.
• Mikhailova, L. I.
• Spolnik, Z. M.
• Van Grieken, R.

Titel

EDXRF determination of impurities in potassium dihydrogenphosphate single crystals and raw materials

Ist Teil von

• X-ray spectrometry, 2006-03, Vol.35 (2), p.112-115

Ort / Verlag

Chichester, UK: John Wiley & Sons, Ltd

Erscheinungsjahr

2006

Quelle

Wiley Blackwell Single Titles

Beschreibungen/Notizen

• A fast and simple preconcentration procedure for recovering various cation impurities from potassium dihydrogenphosphate (KDP) single crystals and raw materials, followed by energy‐dispersive X‐ray fluorescence analysis (EDXRF), is described. The technique is based on the adsorption of metal 8‐hydroxyquinoline complexes from aqueous solutions of KDP on activated carbon, separation of the concentrate on a Nuclepore filter and subsequent determination by EDXRF. To fix activated carbon powder on a filter surface, an amount of 1‐hexadecanol is added to the KDP solution during the preconcentration procedure. The optimum conditions for the best recovery of the impurities were established. It was shown that a preconcentration factor of 100 can be achieved and the detection limit for a number of elements was down to 0.01 µg g−1. The relative standard deviations were 6–17% for element concentrations of 0.2 µg g−1. The method was successfully applied to the determination of Fe, Co, Cu, Ni, Zn, Mn, Ti and Bi in KDP single crystals and raw materials. Copyright © 2005 John Wiley & Sons, Ltd.