کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
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1244269 | 969683 | 2007 | 6 صفحه PDF | دانلود رایگان |
![عکس صفحه اول مقاله: Carbon nanotube composite coated platinum electrode for detection of Cr(III) in real samples Carbon nanotube composite coated platinum electrode for detection of Cr(III) in real samples](/preview/png/1244269.png)
This paper demonstrates the application of composite multi-walled carbon nanotube (MWNT) polyvinylchloride (MWNT-PVC) based on 1,5-diphenylcarbazide as chromium ionophore in potentiometric measurement. The sensor shows a good Nernstian slope of 19.52 ± 0.40 mV/decade in a wide linear range concentration of 6.3 × 10−8 to 1.0 × 10−2 M for Cr(NO3)3. The detection limit of this electrode was found to be 3.2 × 10−8 M of Cr(NO3)3 and is applicable in a pH range of 3.0–6.8. It has a short response time of about 10 s. This chromium electrode has a good selectivity over 16 various metal ions. The practical analytical utility of this electrode was demonstrated by measurement of Cr(III) in drinking water and mineral water samples without any serious preliminary pre-treatment and chromium in multivitamin.
Journal: Talanta - Volume 71, Issue 2, 15 February 2007, Pages 887–892