Citation: Jia Ming Liu, Tian Long Yang, Xiao Mei Huang, Xiu Mei Shi, Zhong Bin Shi, Hong Wu, Guo Hui Zhu, Zhi Ming Li, Cui Lian Chen. Determination of trace calcium by solid substrate-room temperature phosphorimetry[J]. Chinese Chemical Letters, ;2007, 18(2): 195-197. doi: 10.1016/j.cclet.2006.12.016 shu

Determination of trace calcium by solid substrate-room temperature phosphorimetry

a Department of Chemistry and Environmental Science, Zhangzhou Normal College, Zhangzhou 363000, China;
b Department of Food and Biological Engineering, Zhangzhou Institute of Technology, Zhangzhou 363000, China

Received Date: 28 March 2006

Fund Project: This work was supported by Fujian Province Natural Science Foundation (Nos. C 0510028,D 0510027 and 2006J0386).

A new method for the determination of trace calcium by solid substrate-room temperature phosphorimetry is established. It is based on the fact that chromeazurols azurol S-phenanthroline-NaCMC (CAS-phen-NaCMC) system can emit strong and stable room temperature phosphorescence (RTP) on the solid substrate in the filter paper. Ca²⁺ and phenanthroline can form complex ion Ca(phen)₃²⁺, which will form complex [Ca(phen)₃(CAS)₂] with CAS. In the result, the number of CAS molecules in each spot increased, causing sharp increase of the RTP signal of the CAS-phen-NaCMC system.
- Calcium,
- Solid substrate-room temperature phosphorimetry,
- Sodium carboxymethyl cellulose
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