کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
741762 | 894263 | 2007 | 7 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Mercury(II)-selective polymeric membrane electrode based on the 3-[4-(dimethylamino)phenyl]-5-mercapto-1,5-diphenylpentanone Mercury(II)-selective polymeric membrane electrode based on the 3-[4-(dimethylamino)phenyl]-5-mercapto-1,5-diphenylpentanone](/preview/png/741762.png)
A new poly(vinylchloride) (PVC) membrane electrode based on 4-(4-N,N-dimethylphenyl)-2,6-diphenylpyrilium tetrafluoroborate as the ionophore was prepared, which shows a good selectivity for mercury(II) ions. The electrode indicates a good linear response for mercury(II) over a wide concentration range from 1.0 × 10−8 to 1.0 × 10−3 M, with a near-Nernstian slope of 34 mV per decade and the detection limit is 1.0 × 10−8 M. This membrane electrode operates well in the pH range of 2.5–7.0 and can be used for at least 30 days without observing any considerable deviation. Selectivity coefficients of some mono-, di- and trivalent metal ions were also determined. The sensor exhibits high selectivity towards mercury(II), compared with the alkali, alkaline earth and transition metal ions. The electrode was also applied as an indicator electrode for potentiometric titration of mercury(II) ion with I−.
Journal: Sensors and Actuators B: Chemical - Volume 123, Issue 1, 10 April 2007, Pages 352–358