Single reaction interface in flow analysis

• Type: Article in International Scientific Journal
• Date: 2005

Authors

Ribeiro, MFT (Author) Other; Santos, JLM (Author) FFUP; Lima, JLFC (Author) FFUP; Dias, ACB (Author) Other; Zagatto, EAG (Author) Other

Journal

Title: Talanta

Vol. 68

Pages: 351-358

ISSN: 0039-9140

Publisher: Elsevier

Indexing

ISI Web of Knowledge - 16 Citations

ISI Web of Science

Scopus - 15 Citations

Scientific classification

FOS: Natural sciences > Chemical sciences

CORDIS: Health sciences

Other information

Authenticus ID: P-000-01W

DOI: 10.1016/j.talanta.2005.08.061

Resumo (PT): The dual or multiple reaction interface concept, commonly associated to the distinct flow techniques, was replaced by a single interface concept, which do not no rely on the utilisation of a well-defined and compelling sample volume but only on mutual penetration of sample and reagent zones at a single reaction interface where both sample and reagent met together prior to detection. In the proposed approach basic principles of flow analysis, such as controlled dispersion and reaction zone formation, are not influenced by sample and reagent volumes but determined exclusively by the extension of the overlap of two adjoining quasi-infinite zones enhanced by multiple flow reversals and the pulsed nature of the flowing streams. The detector is positioned at the core of the flow manifold (not in the conventional terminal position), and repetitive flow reversals enable interface manipulations, including multi-detection of the entire reaction interface or the monitoring of the evolution of a pre-selected interface zone by using suitable reversal cycle times. The implementation of the developed approach was facilitated due to the configuration simplicity and operational versatility of multi-pumping flow systems. Its performance was evaluated by monitoring processes involving two or four-solution reaction interfaces. <br> <br> Keywords: Flow analysis; Single reaction interface; Multi-pumping flow system; Solenoid micro-pump <br> <a target="_blank" href="http://www.sciencedirect.com/science?_ob=ArticleURL&_udi=B6THP-4H8MNPS-3&_user=2460038&_coverDate=12%2F15%2F2005&_rdoc=33&_fmt=high&_orig=browse&_srch=doc-info(%23toc%235288%232005%23999319997%23610440%23FLA%23display%23Volume)&_cdi=5288&_sort=d&_docanchor=&_ct=51&_acct=C000057398&_version=1&_urlVersion=0&_userid=2460038&md5=09ce8003e9648a7423f0184902aa3cd3"> Texto integral</a> <br> <br>

Abstract (EN): The dual or multiple reaction interface concept, commonly associated to the distinct flow techniques, was replaced by a single interface concept, which do not no rely on the utilisation of a well-defined and compelling sample volume but only on mutual penetration of sample and reagent zones at a single reaction interface where both sample and reagent met together prior to detection. In the proposed approach basic principles of flow analysis, such as controlled dispersion and reaction zone formation, are not influenced by sample and reagent volumes but determined exclusively by the extension of the overlap of two adjoining quasi-infinite zones enhanced by multiple flow reversals and the pulsed nature of the flowing streams. The detector is positioned at the core of the flow manifold (not in the conventional terminal position), and repetitive flow reversals enable interface manipulations, including multi-detection of the entire reaction interface or the monitoring of the evolution of a pre-selected interface zone by rising suitable reversal cycle times. The implementation of the developed approach was facilitated due to the configuration simplicity and operational versatility of multi-pumping flow systems. Its performance was evaluated by monitoring processes involving two or four-solution reaction interfaces.

Language: English

Type (Professor's evaluation): Scientific

No. of pages: 8