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Article Dans Une Revue Analytical and Bioanalytical Chemistry Année : 2011

A rapid and reversible colorimetric assay for the characterization of aminated solid surfaces

Résumé

The covalent immobilization of synthetic or natural macromolecular compounds containing amino groups onto polystyrene (PS) solid surfaces is of great interest in diagnostic applications. A sensitive assay allowing the determination of reactive end groups is therefore a powerful tool for predicting the performance of the active surface. Recently, we reported the use of the Coomassie Brilliant Blue (CBB) colorimetric reagent to quantify protonated groups (N+) in linear and dendritic structures in solution (Coussot G et al. Polym Int 58(5):511-518). In this work, a simple method using CBB dye for the characterization of PS aminated solid-surfaces is developed. The proposed Amino Density Estimation by Colorimetric Assay (ADECA) method is based on the reversible complexation of the dye with the N+ groups on solid surfaces. The assay measures the released dye thanks to the use of a unique sodium carbonate-methanol buffer. Thereby, for the first time, the same surface can be used for characterization and for further coupling applications. A surface density of 4 N + groups per nm2 can be measured in PS microwell format, the whole characterization being done within 30 min. Performances of this new colorimetric-based method are detailed. The ADECA method is further demonstrated to be useful for the characterization of aminated polypropylene, and glass materials with various sizes and shapes.

Domaines

Chimie organique

Dates et versions

hal-00553885 , version 1 (10-01-2011)

Identifiants

Citer

Gaëlle Coussot, Catherine Perrin, Thomas Moreau, M. Dobrijevic, A. Le Postollec, et al.. A rapid and reversible colorimetric assay for the characterization of aminated solid surfaces. Analytical and Bioanalytical Chemistry, 2011, 399 (3), pp.1061-1069. ⟨10.1007/s00216-010-4363-7⟩. ⟨hal-00553885⟩
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