Modified carbon paste sensor for cetyltrimethylammonium ion based on its ion-associate with tetrachloropalladate(II). |
| |
| Authors: | Hosny Ibrahim Amal Khorshid |
| |
| Affiliation: | Chemistry Department, Faculty of Science, Cairo University, Egypt. dr_hosny@yahoo.com |
| |
| Abstract: | A comparative study was made between developed chemically modified carbon paste electrodes and PVC membrane electrodes for the cationic surfactant cetyltrimethylammonium bromide (CTAB). The carbon paste electrode modified with cetyltrimethylammonium-tetrachloropalladate(II) (CTA-TClP) provides a more sensitive and stable device than that shown by electrodes with an inner reference solution. The best performance was obtained by an electrode based on the paste containing 3.6 wt% CTA-TCIP, 1.8 wt% ethylhexadecyldimethylammonium bromide, 37.6 wt% graphite and 57 wt% tricresyl phosphate. The sensor exhibited a Nernstian response for CTAB over a wide concentration range of 3.5 x 10(-7) to 1.0 x 10(-3) M with a detection limit of 2.0 x 10(-7) M between pH 2.7 and 8.2 with a fast response time of
|
| |
| Keywords: | |
|
|
