Paper-based plasticizer-free sodium ion-selective sensor with camera phone as a detector.
An ionophore-based ion-selective optode platform on paper is described for the first time with a sodium optode as the example. Cellulose paper is shown to be an excellent substrate for adsorption of the required chromoionophore, ionophore, and ion-exchanger species. These adsorbed components form a hydrophobic phase that enables heterogeneous optical ion sensing in the absence of any plasticizer or organic polymer phase.
Department of Chemistry, University of Michigan, 930 N. University, Ann Arbor, MI 48109-1055, USA. mmeyerho@umich.edu.
Xuewei
X
Wang
Yu
Y
Qin
Mark E
ME
Meyerhoff
D000327:Adsorption; D001881:Borates / Q000737:chemistry; D040421:Cell Phone / Q000295:instrumentation*; D006845:Hydrocarbons, Fluorinated / Q000737:chemistry; D007476:Ionophores / Q000737:chemistry; D010209:Paper; D012964:Sodium / Q000032:analysis*
D001881:Borates; D006845:Hydrocarbons, Fluorinated; D007476:Ionophores; C000597414:tetrakis(3,5-bis(trifluoromethyl)phenyl)borate; D012964:Sodium