caa a22 4500 445879653 CHVBK 20180317145538.0 cr unu---uuuuu 170323e20110301xx s 000 0 eng 10.1007/s00604-010-0520-0 doi (NATIONALLICENCE)springer-10.1007/s00604-010-0520-0 Compact optical instrument for simultaneous determination of oxygen and carbon dioxide [Elektronische Daten] [Isabel Pérez de Vargas-Sansalvador, Antonio Martinez-Olmos, Alberto Palma, María Fernández-Ramos, Luis Capitán-Vallvey] A multi-analyte platform based on a portable instrument is presented that enables oxygen and carbon dioxide to be determined in sample gases. The use of four sensing channels (two channels for each analyte to provide redundancy) warrants high system reliability. The sensing scheme in case of oxygen is based on the quenching of the phosphorescence of the platinum octaethylporphyrin complex. In case of carbon dioxide, a secondary inner-filter effect is exploited that is caused by a pH indicator whose color is reversibly changed. The sensing membranes were placed directly on the detectors and on the light sources so to make additional optical element dispensable, reduce system costs, avoid problems related to optical alignment, optimize the efficiency of data acquisition, and enable facile replacement of sensors. The resulting microcontroller-based system is immune against optical and electrical interferences, contains simple digital signal processing circuitry, and has low power consumption. The response of the system to the two gases was modeled, and calibration curves are corrected for effects of temperature. The instrument was characterized in terms of cross-sensitivity and dynamic response. It can determine oxygen and carbon dioxide in terms of volume percentage. Figure Gas sensing module for simultaneous determination of O2 and CO2 Springer-Verlag, 2010 Carbon dioxide nationallicence Oxygen nationallicence Optical gas sensor nationallicence Phosphorescence nationallicence Portable instrumentation nationallicence Pérez de Vargas-Sansalvador Isabel ECsens. Department of Analytical Chemistry, Faculty of Sciences, University of Granada, Campus Fuentenueva, E-18071, Granada, Spain aut Martinez-Olmos Antonio ECsens. Department of Electronics and Computer Technology, Faculty of Sciences, University of Granada, Campus Fuentenueva, E-18071, Granada, Spain aut Palma Alberto ECsens. Department of Electronics and Computer Technology, Faculty of Sciences, University of Granada, Campus Fuentenueva, E-18071, Granada, Spain aut Fernández-Ramos María ECsens. Department of Analytical Chemistry, Faculty of Sciences, University of Granada, Campus Fuentenueva, E-18071, Granada, Spain aut Capitán-Vallvey Luis ECsens. Department of Analytical Chemistry, Faculty of Sciences, University of Granada, Campus Fuentenueva, E-18071, Granada, Spain aut Microchimica Acta Springer Vienna 172/3-4(2011-03-01), 455-464 0026-3672 172:3-4<455 2011 172 604 https://doi.org/10.1007/s00604-010-0520-0 text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s00604-010-0520-0 text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Pérez de Vargas-Sansalvador Isabel ECsens. Department of Analytical Chemistry, Faculty of Sciences, University of Granada, Campus Fuentenueva, E-18071, Granada, Spain aut NATIONALLICENCE 700 1- Martinez-Olmos Antonio ECsens. Department of Electronics and Computer Technology, Faculty of Sciences, University of Granada, Campus Fuentenueva, E-18071, Granada, Spain aut NATIONALLICENCE 700 1- Palma Alberto ECsens. Department of Electronics and Computer Technology, Faculty of Sciences, University of Granada, Campus Fuentenueva, E-18071, Granada, Spain aut NATIONALLICENCE 700 1- Fernández-Ramos María ECsens. Department of Analytical Chemistry, Faculty of Sciences, University of Granada, Campus Fuentenueva, E-18071, Granada, Spain aut NATIONALLICENCE 700 1- Capitán-Vallvey Luis ECsens. Department of Analytical Chemistry, Faculty of Sciences, University of Granada, Campus Fuentenueva, E-18071, Granada, Spain aut NATIONALLICENCE 773 0- Microchimica Acta Springer Vienna 172/3-4(2011-03-01), 455-464 0026-3672 172:3-4<455 2011 172 604 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer