Cathodic stripping voltammetric determination at a hanging mercury drop electrode of the environmental heavy metal precipitant trimercapto-s-triazine (TMT)
Trimercapto-s-triazine (TMT) is available commercially for precipitating heavy metals in effluents prior to discharge and for recovering silver and copper. The TMT content of an effluent for discharge is normally monitored down to about 2 ppm by means of its UV absorption at 285 nm. Indirect cathodi...
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| Format: | Article |
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Elsevier
1997
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| author | Fogg, Arnold G. Ismail, Razali Mohd. Yusoff, Abd. Rahim Ahmad, Rahmalan Banica, Florin G. |
| author_facet | Fogg, Arnold G. Ismail, Razali Mohd. Yusoff, Abd. Rahim Ahmad, Rahmalan Banica, Florin G. |
| author_sort | Fogg, Arnold G. |
| collection | ePrints |
| description | Trimercapto-s-triazine (TMT) is available commercially for precipitating heavy metals in effluents prior to discharge and for recovering silver and copper. The TMT content of an effluent for discharge is normally monitored down to about 2 ppm by means of its UV absorption at 285 nm. Indirect cathodic-stripping voltammetric methods of determining TMT at sub-ppb levels in standard solutions are reported here. These methods might prove suitable for the determination of TMT in effluent at levels lower than is currently possible. TMT can be accumulated and determined indirectly at pH 9.0 as its mercury salt down to sub-ppb levels. Accumulation is made at 0 V and the mercury TMT reduction peak is at -0.47 V. Alternatively, by adding nickel(II), TMT can be determined optimally at pH 7.8, using the catalytic nickel peak at -0.73 V and accumulating between -0.10 and -0.60 V: at this pH the HgTMT peak at -0.47 V is small. At slightly higher pH (pH 8.6) the nickel TMT complex can be accumulated directly at -0.40 V, but at this pH, however, a slightly increased sensitivity can be achieved by accumulating TMT as its mercury salt, at -0.1 V in the presence of nickel(II), the nickel TMT complex being formed during the potential sweep on the release of the TMT when the mercury salt is reduced. Unlike many other thiols TMT is not accumulated as its copper(I) salt on addition of copper(II) to the solution. |
| first_indexed | 2024-03-05T17:54:37Z |
| format | Article |
| id | utm.eprints-534 |
| institution | Universiti Teknologi Malaysia - ePrints |
| last_indexed | 2024-03-05T17:54:37Z |
| publishDate | 1997 |
| publisher | Elsevier |
| record_format | dspace |
| spelling | utm.eprints-5342017-10-16T00:53:43Z http://eprints.utm.my/534/ Cathodic stripping voltammetric determination at a hanging mercury drop electrode of the environmental heavy metal precipitant trimercapto-s-triazine (TMT) Fogg, Arnold G. Ismail, Razali Mohd. Yusoff, Abd. Rahim Ahmad, Rahmalan Banica, Florin G. QD Chemistry Trimercapto-s-triazine (TMT) is available commercially for precipitating heavy metals in effluents prior to discharge and for recovering silver and copper. The TMT content of an effluent for discharge is normally monitored down to about 2 ppm by means of its UV absorption at 285 nm. Indirect cathodic-stripping voltammetric methods of determining TMT at sub-ppb levels in standard solutions are reported here. These methods might prove suitable for the determination of TMT in effluent at levels lower than is currently possible. TMT can be accumulated and determined indirectly at pH 9.0 as its mercury salt down to sub-ppb levels. Accumulation is made at 0 V and the mercury TMT reduction peak is at -0.47 V. Alternatively, by adding nickel(II), TMT can be determined optimally at pH 7.8, using the catalytic nickel peak at -0.73 V and accumulating between -0.10 and -0.60 V: at this pH the HgTMT peak at -0.47 V is small. At slightly higher pH (pH 8.6) the nickel TMT complex can be accumulated directly at -0.40 V, but at this pH, however, a slightly increased sensitivity can be achieved by accumulating TMT as its mercury salt, at -0.1 V in the presence of nickel(II), the nickel TMT complex being formed during the potential sweep on the release of the TMT when the mercury salt is reduced. Unlike many other thiols TMT is not accumulated as its copper(I) salt on addition of copper(II) to the solution. Elsevier 1997-03 Article PeerReviewed Fogg, Arnold G. and Ismail, Razali and Mohd. Yusoff, Abd. Rahim and Ahmad, Rahmalan and Banica, Florin G. (1997) Cathodic stripping voltammetric determination at a hanging mercury drop electrode of the environmental heavy metal precipitant trimercapto-s-triazine (TMT). Talanta, 44 (3). pp. 497-500. ISSN 0039-9140 https://www.ncbi.nlm.nih.gov/pubmed/18966768 doi:10.1016/S0039-9140(96)02073-5 |
| spellingShingle | QD Chemistry Fogg, Arnold G. Ismail, Razali Mohd. Yusoff, Abd. Rahim Ahmad, Rahmalan Banica, Florin G. Cathodic stripping voltammetric determination at a hanging mercury drop electrode of the environmental heavy metal precipitant trimercapto-s-triazine (TMT) |
| title | Cathodic stripping voltammetric determination at a hanging mercury drop electrode of the environmental heavy metal precipitant trimercapto-s-triazine (TMT) |
| title_full | Cathodic stripping voltammetric determination at a hanging mercury drop electrode of the environmental heavy metal precipitant trimercapto-s-triazine (TMT) |
| title_fullStr | Cathodic stripping voltammetric determination at a hanging mercury drop electrode of the environmental heavy metal precipitant trimercapto-s-triazine (TMT) |
| title_full_unstemmed | Cathodic stripping voltammetric determination at a hanging mercury drop electrode of the environmental heavy metal precipitant trimercapto-s-triazine (TMT) |
| title_short | Cathodic stripping voltammetric determination at a hanging mercury drop electrode of the environmental heavy metal precipitant trimercapto-s-triazine (TMT) |
| title_sort | cathodic stripping voltammetric determination at a hanging mercury drop electrode of the environmental heavy metal precipitant trimercapto s triazine tmt |
| topic | QD Chemistry |
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