Determination of terbium with solid surface room temperature luminescence optosensing

✍ Scribed by Wei Shoulian; Lu Jianzhong; Zhang Zhujun

• Publisher: Elsevier Science
• Year: 1996
• Tongue: English
• Weight: 367 KB
• Volume: 322
• Category: Article
• ISSN: 0003-2670
• DOI: 10.1016/0003-2670(95)00609-5

✦ Synopsis

Transient immobilization of the complex formed by acetylacetone with Tb(III) on the chelating resin of Chelex 100 packed in a flow cell can induce a room temperature luminescence behaviour in aqueous solutions. Based on this phenomenon, a new room temperature luminescence optosensing method in aqueous flow system was established to determine terbium in the range of 4.0 X lo-*-4.0 X IO-' M by using a response time of 30 s. Each measurement takes 1 min. The response mechanism of the optosensor was also studied. The present optosensor was easy to prepare and the lifetime of the optosensor was at least 1 month. The optosensor has been applied to the determination of terbium ion in the synthetic samples.