Porphyrin-modified electrodes as biomimetic sensors for the determination of organohalide pollutants in aqueous samples
Dobson, DJ; Saini, S
| HERO ID | 3559396 |
|---|---|
| In Press | No |
| Year | 1997 |
| Title | Porphyrin-modified electrodes as biomimetic sensors for the determination of organohalide pollutants in aqueous samples |
| Authors | Dobson, DJ; Saini, S |
| Journal | Analytical Chemistry |
| Volume | 69 |
| Issue | 17 |
| Page Numbers | 3532-3538 |
| Abstract | A preliminary examination of a simple and rapid screening method for quantifying a range of toxic organohalides directly in aqueous solution based on their electrocatalytic reduction with a metalloporphyrin catalyst is described. Homogenous catalysis is described as well as heterogeneous catalysis using precipitated cobalt(II) tetraphenylporphine ((TPP)Co) at a graphite foil electrode which permitted the sensitive detection of a wide range of different organohalides, including a number of chemically diverse industrial pollutants such as 1,2,3,4,5,6-hexachlorocyclohexane (lindane) and carbon tetrachloride, representative of haloalkane compounds, haloalkenes such as perchloroethylene, and aromatics, such as 2,4-dichlorophenoxyacetic acid, pentachlorophenol, and the insecticide DDT. The coordinating effect of solvent on the thermodynamics of the Co(II)/(I) electrode reaction is used to practical advantage to build an amperometric detector that is insensitive to interference from oxygen, a parameter that varies considerably in environmental samples. Devices also appear relatively insensitive to the ionic composition of the analyte sample, The work provides the basis for developing a prototype sensor for screening toxic organohalogen pollutants for use in environmental monitoring situations. |
| Doi | 10.1021/ac970353p |
| Pmid | 21639277 |
| Wosid | WOS:A1997XU10100024 |
| Url | https://www.proquest.com/scholarly-journals/porphyrin-modified-electrodes-as-biomimetic/docview/870547109/se-2?accountid=171501 |
| Is Certified Translation | No |
| Dupe Override | No |
| Comments | Journal: ISSN: |
| Is Public | Yes |
| Language Text | English |