Rangel, António O. S. S.

English

Repositório Institucional da Universidade Católica Portuguesa

Flow Analysis XII.Y,.1••••• • ••••INTERNATIONAL CONFERENCEON FLOWANALYSISThessaloniki. Greece. 23-28 September. 2012AnodicBasedNickelCapiUaryIII~'u:õ:liR . ceactlon.2FluidelUQ.fQ.BOOKDF ABSTRACTSAristotLe Univerisity of Thessaloniki (AUTH)Depatrment of O1emistryLab. of Analytical Chemistry>-cu m.~ .,..~ cU) ••• ta ta; O~~§a. ._...,Q.J:! ln s:: •••••«1) Platform0i: .- o u~f·z; CU 51A'- ta· ••.••-a; u E: ~IE ::::: - Derlvatlzatlon.-~ ,...'- o •••~!~FlOWE~SpectrophotETAASPt C.rbohydrlto Ana] Ana~ ••••• Environ.: ...., o o.c .-ii C I-E _ ta u u8 ....J: .-.-~ ~ ~~~IL·lTackling the challenges of monitoring dynamic systems by using flow analysisAntónio O. S. S. RangelCBQF/EscofaSuperior de Biotecnologia, Universidade Católica Portuguesa, Porto, Portugale-mail: arangel@parta.ucp.ptFlow analysis has started as an automation tool for wet chemical assays.Its scope was further expandedto study chemical and biochemical processes. Due to its versatility and possibility for real time monitoring, ithas also become a powerful tool to study dynamic systems, namely associated to environmental research orto understand biological processes. To monitor these processes, some important analytical challengesemerge: need for efficient sampling procedures; cope with a wide range of analyte concentrations; possibleneed for pre-concentration; minimization of interferences; search for greener chemistries; reducing sampieand reagents consumption.To tackle the above-mentioned challenges, the use of in-Iine separation processes Iike gas diffusion,dialysis, solid phase extraction (either in the reusable ar renewable bead injection rnode), andchromatography-Iike separation (use of monolithic columns), have emerged as powerful tools to bothincreasethe selectivity and sensitivity of flow analysis methods, and yet to maintain the major advantages ofits use, that is, the relative simplicity and low cost.ln this scenario, some recent contributions of the group on this line of work are discussed. Examples ofthe approaches used to deal with the complexity of measurements in samples of high temporal and specialvariability Iike estuarine and coastal waters will be presented, comprehending the determination of macroand micro nutrients. Strategies used to monitor processes like codfish desalting or wine analysis will also bebrought to discussion.AcknowledgementsThls wark was supported by National Funds from FCT through projects PTDC/AAC-AMB/l04882/2008 and PEst-C/EQB/LA0016!2011.iz" International Conference on Flow Analysis

Tackling the challenges of monitoring dynamic systems by using flow analysis

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Tackling the challenges of monitoring dynamic systems by using flow analysis

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