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Novel analytical applications of porphyrin to HPLC post-column flow injection system for determination of the lanthanides
- Source :
-
Talanta . Mar2006, Vol. 69 Issue 1, p61-67. 7p. - Publication Year :
- 2006
-
Abstract
- Abstract: A novel indirect substitution spectrophotometric methodology using porphyrin is developed for the determination of some metals that do not react with porphyrin directly. The methodology is concerned with a multistep reaction system, which consists of 3 complexation reactions that occur in a sequence of EDTA with metal, EDTA with Cu(II) and porphyrin with Cu(II). The complexation reaction of Cu(II) with a cationic porphyrin, meso-tetrakis (4-N-trimethylaminophenyl)-porphine (ttmapp), which has a high molar absorptivity about 5×105 lmol−1 cm−1, serves for spectrophotometric detection. This methodology was verified through individual determinations of 14 species of lanthanides following a batchwise procedure, which was further developed to an automatic procedure on a HPLC post-column flow injection system for simultaneous analysis of the lanthanides. Compared with the conventional post-column derivatization method using 4-(2-pyridylazo) resorcinol (PAR), the analytical sensitivity was greatly improved in this method and the results also showed good linearity. [Copyright &y& Elsevier]
Details
- Language :
- English
- ISSN :
- 00399140
- Volume :
- 69
- Issue :
- 1
- Database :
- Academic Search Index
- Journal :
- Talanta
- Publication Type :
- Academic Journal
- Accession number :
- 19589090
- Full Text :
- https://doi.org/10.1016/j.talanta.2005.08.056