Influence of polymer composition on the sensitivity towards nitrite and nitric oxide of colorimetric disposable test strips
| Autor: | Víctor Fabregat, Francisco Galindo, M. Isabel Burguete, Santiago V. Luis |
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| Rok vydání: | 2016 |
| Předmět: |
Anions
Polymers Health Toxicology and Mutagenesis Nitrite Inorganic chemistry 02 engineering and technology 010402 general chemistry Nitric Oxide 01 natural sciences Nitric oxide Absorption chemistry.chemical_compound Limit of Detection Environmental Chemistry Sensitivity (control systems) Nitrites Acrylic acid chemistry.chemical_classification Detection limit Sensors General Medicine Polymer 021001 nanoscience & nanotechnology Pollution 0104 chemical sciences Monomer chemistry Colorimetry Absorption (chemistry) 0210 nano-technology Hydrophobic and Hydrophilic Interactions Analysis |
| Zdroj: | Environmental science and pollution research international. 24(4) |
| ISSN: | 1614-7499 |
| Popis: | The influence of polymer composition on the sensitivity towards nitrite (NO 2 − ) and nitric oxide (NO) of a series of 19 polymeric hydrogel films has been stud- ied. The polymers, based on the hydrophilic monomer 2- hydroxyethylmethacrylate (HEMA), are able to encapsu- late the colorimetric indicator 1,2-diaminoanthraquinone (DAQ) and to respond to NO 2 − and NO by visual chang- es. In the case of nitrite, the calculated limits of detection (LOD) for two of the polymeric sensors (10 μ M) are very close to the sensitivity estimated for free DAQ in solution (LOD 5 μ M), but with the advantage of a solid supported sensor with the format of a disposable test- strip made with affordable starting chemicals. The re- sults are interpreted taking into account the nature and proportions of monomers and cross-linkers used for the synthesis of polymers. Key factors for obtaining sensi- tive materials are the hydro philic character of the film along with the utilization of low levels of cross-linker and the use of an acidic monomer, like acrylic acid, as a building block. Financial support from the Spanish MINECO (CTQ2015-68429-R) and Fundació Caixa Castelló-UJI (P1·1B2015-76) is acknowledged. V. F. thanks the financial support from UJI (predoctoral fellowship). We thank SCIC/UJI for technical assistance. |
| Databáze: | OpenAIRE |
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