Lanthanum (III) Ion Determination by a New Design Optical Sensor

作者：Zare Dorabei Rouhallah^*; Dashtian Kheibar; Jalalat Vahideh

来源：IEEE Sensors Journal, 2015, 15(11): 6715-6721.

DOI：10.1109/JSEN.2015.2465836

• Lanthanum
• optical sensor
• N-(2-aminoethyl) - salicylaldimine
• triacetylcellulose
• water samples

A novel selective and sensitive Lanthanum (La) ions optical sensor based on immobilization of N-(2-aminoethyl)-salicylaldimine (AESI) on a triacetylcellulose membrane was prepared. The prepared optode exhibited a linear range of 30-150 part per billion (ppb) of the La (III) ion concentration with a detection limit of 14.38 ppb. The response time of the newly designed optode was derived within 30-60 s, depending on the La (III) ion concentration, however is independent to the pH of the solution in the range of 3-5. The proposed optode indicated a low detection limit, fast response time, and also remarkable selectivity regarding to the number of transition metals ions (i.e. Ce3+, Cu2+, Cd2+, Cr3+, Zn2+, Hg2+, and Fe2+). The optode was successfully regenerated with a thiourea solution, and its response which might be reversible and reproducible showed the relative standard deviation of less than 1.48%. This optode was applied for determining the La (III) ions in water samples.

• 出版日期2015-11