摘要

A novel optical sensor (optode) is described for the determination of thiocyanate using methyltrioctyl ammonium chloride immobilized on triacetylcellulose membrane. The response to thiocyanate is the result of adsorption of [Co(SCN)(4)](2-) on sensing membrane, which caused the colorless membrane to change to blue. This optode can readily be regenerated by using 0.02 mol/l sodium oxalate solution. The linear range of the method was 3.44 x 10(-5) to 8.61 x 10(-4) mol/l of thiocyanate with a limit of detection 1.51 x 10(-5) mol/l. The relative standard deviation for eight replicate measurements of 8.61 x 10(-5) and 4.30 x 10(-4) mol/l of thiocyanate was 3.45 and 1.23%, respectively. The sensor was successfully applied for the determination of thiocyanate in saliva of smokers, nonsmokers and various water samples.

  • 出版日期2007