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  • Development of a fluorescent optode membrane for sodium ion based on the calix[4]arene and tetraphenylporphine.

Development of a fluorescent optode membrane for sodium ion based on the calix[4]arene and tetraphenylporphine.

Talanta (2008-10-31)
X Yang, K Wang, D Xiao, C Guo, Y Xu
ABSTRACT

A fluorescent optode membrane for sodium ion that works on the basis of a cation-exchange mechanism has been developed. The plasticized poly(vinyl chloride) (PVC) membrane incorporating sodium-selective ionophore (4-tert-butylcalix[4]arene tetraacetic acid tetraethyl ester), acidic fluorescent pH indicator (5,10,15,20-tetraphenylporphine, TPP) and a lipophilic anionic site (potassium tetrakis(4-chlorophenyl)borate) was used as the sensing device, which exhibits the theoretically expected fluorescent response to sodium ion. The selectivity, response time, reproducibility and lifetime of the optode membrane were discussed.

MATERIALS
Product Number
Brand
Product Description

Supelco
Potassium tetrakis(4-chlorophenyl)borate, Selectophore, ≥98.0%