A critical review on photochemical conversions in flow analysis

Author(s)

Rocha, Diogo L. ^[1] ; Kamogawa, Marcos Y. ^[2] ; Rocha, Fabio R. P. ^[3]

Affiliation

^[1] Fed Univ ABC, Ctr Nat & Human Sci, BR-09210170 Santo Andre, SP - Brazil

^[2] Univ Sao Paulo, Luiz de Queiroz Coll Agr, BR-13418970 Piracicaba, SP - Brazil

^[3] Univ Sao Paulo, Ctr Nucl Energy Agr, BR-13400970 Piracicaba, SP - Brazil

• Document type: Review article
• Source: Analytica Chimica Acta; v. 896, p. 11-33, OCT 8 2015.
• Web of Science Citations: 17

Abstract

Photochemical conversions are cost-effective and environmental friendly processes that require mild experimental conditions and avoid generation of highly acidic wastes. Treated samples are then compatible with most of the analytical techniques. These characteristics become more relevant when the photoconversions are accomplished to flow analysis, thus allowing exploitation of incomplete reactions, the effective use of the photogenerated unstable radicals and in-line sample treatment. Decreasing of reagent consumption and waste generation, sample processing in a closed environment, and improvement of efficiency of the photochemical processes are other inherent advantages. These aspects are critically reviewed in this article, which emphasizes applications to fractionation and speciation analysis, photo-induced luminescence, miniaturization, and in-line waste treatment. Design of flow-through photochemical cells, use of auxiliary reagents in homogeneous and heterogeneous media, and configurations of flow manifolds are also discussed. (C) 2015 Elsevier B.V. All rights reserved. (AU)

• FAPESP's process: 11/23498-9 - Advanced flow systems for technological, agronomical and environmental analysis
• Grantee: Elias Ayres Guidetti Zagatto
• Support Opportunities: Research Projects - Thematic Grants