P1.5 - Transmitted light pH optode for small sample volumes
- 18. GMA/ITG-Fachtagung Sensoren und Messsysteme 2016
2016-05-10 - 2016-05-11
- P1 Optische Messverfahren
- C. Rogge, S. Schneider, M. Heinrich, S. Zinn, A. Foitzik - University of Applied Science Wildau, Wildau (Germany), P. Prosposito - University of Rome Tor Vergata, Roma (Italy)
- 530 - 533
An innovative low cost pH optode concept for small sample volumes is presented. The pH monitoring is based on the color changing effect of phenol red, which is a well known reagent in nutrition media for cell cultivation. The optode includes an USB spectrophotometer, a controllable LED, some reactor slides and a self-written LabVIEW software. Spectral behavior at 450 nm and 560 nm is indicative of the pH value of the investigated samples.