Determination of acetylacetone and alcohols in titanium chelates

✍ Scribed by Erik Kissa

• Publisher: Elsevier Science
• Year: 1993
• Tongue: English
• Weight: 350 KB
• Volume: 281
• Category: Article
• ISSN: 0003-2670
• DOI: 10.1016/0003-2670(93)85196-q

✦ Synopsis

Acetylacetone (2,4pentanedione) and alcohols in titanium chelates have been determined by gas chromatography of the solvolyzed chelate. For the determination of acetylacetone, the titanium chelate is cleaved with acetic acid at 140-150°C for 2-4 h in a closed system. The acetylacetone liberated is determined by capillary gas chromatography as the trimethylsilyl derivative. Normal alcohols elute as acetates, isopropyl alcohol elutes as a mixture of the corresponding acetate and trimethylsilyl derivative. The cleavage of a titanium chelate with acetic anhydride by heating at 130°C for 2 h converts alcohols, including isopropyl alcohol, quantitatively to their acetates which elute as a single peak for each alcohol. Acetylacetone decomposes partially under these conditions and the acetic anhydride method is useful only for the determination of alcohols.