Details

Autor(en) / Beteiligte

• Bichinho, Kátia M.
• Pires, Gilvan Pozzobon
• dos Santos, João Henrique Z.
• Wolf, Carlos Rodolfo

Titel

Determination of Mg and Ti in Ziegler-Natta catalysts by x-ray fluorescence spectrometry

Ist Teil von

• X-ray spectrometry, 2005-03, Vol.34 (2), p.131-134

Ort / Verlag

Chichester, UK: John Wiley & Sons, Ltd

Erscheinungsjahr

2005

Link zum Volltext

Quelle

Wiley Online Library - AutoHoldings Journals

Beschreibungen/Notizen

• The metal content in Ziegler–Natta catalysts based on Ti and Mg derivatives could not be determined directly by x‐ray fluorescence (XRF) spectrometry owing to the instability of the catalyst. The samples were then calcined and the resultant Mg and Ti oxides were characterized by x‐ray diffraction (XRD). A series of synthetic standards were prepared with high‐purity MgO and TiO2, since there were no available certified standards for the catalysts. Samples and standards were compressed with high‐purity H3BO3 flux. This protocol was shown to be reproducible, having a correlation coefficient of 0.9999. The metal contents determined by XRF were in accordance with those obtained by a complexometric titration (Mg) and a UV–visible spectrophotometric method (Ti). Copyright © 2004 John Wiley & Sons, Ltd.